fzus61 kbuf 061403
glflo 
expires:202608062100;;716035

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt thu aug 6 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.3 inch high off the mid-alantic will 
slowly drift south and southeast while weakening to 30.2 inches 
through saturday. meanwhile, a 29.4 inch low over northeastern 
manitoba will slowly track east over the hudson bay and weaken to 
29.6 inches by saturday while sending its cold front through the 
region. a 30.1 inch high over the southeast will then nose in over 
the lake sunday followed by a 29.7 inch low that will pass by to our 
north monday through tuesday.


loz063>065-062100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt thu aug 6 2026

.this afternoon...southwest winds 5 to 10 knots becoming west.
waves 1 foot or less. 
.tonight...southwest winds less than 10 knots. waves 1 foot or
less. 
.friday...southwest winds less than 10 knots becoming southeast.
showers likely with a chance of thunderstorms in the afternoon.
waves 1 foot or less. 
.friday night...south winds 10 knots or less becoming southwest.
showers likely with a chance of thunderstorms. waves 1 foot or
less. 
.saturday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers saturday night. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers sunday night. waves 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms monday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 061403
glflo 
expires:202608062100;;716034

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt thu aug 6 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.3 inch high off the mid-alantic will 
slowly drift south and southeast while weakening to 30.2 inches 
through saturday. meanwhile, a 29.4 inch low over northeastern 
manitoba will slowly track east over the hudson bay and weaken to 
29.6 inches by saturday while sending its cold front through the 
region. a 30.1 inch high over the southeast will then nose in over 
the lake sunday followed by a 29.7 inch low that will pass by to our 
north monday through tuesday.


loz062-062100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt thu aug 6 2026

.this afternoon...southwest winds less than 10 knots. waves 1 foot
or less. 
.tonight...south winds less than 10 knots. waves 1 foot or less. 
.friday...light and variable winds. a chance of showers in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 1 foot or less. 
.friday night...southeast winds 5 to 10 knots becoming southwest.
a chance of showers and thunderstorms in the evening, then a
chance of showers overnight. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.sunday...west winds 5 to 10 knots becoming southwest. a chance
of showers sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms monday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 061330
glfle 
expires:202608062015;;715124

open lake forecast for lake erie
national weather service cleveland oh
930 am edt thu aug 6 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 30.00 inches will remain just northwest of the
lake today. another trough averaging 29.90 inches will enter the
great lakes region friday into saturday and extend a cold front
across the lake on saturday night. a ridge averaging 30.00 inches
will briefly build into the region on sunday and a warm front will
cross the lake. low pressure 29.80 inches will enter the great
lakes for monday.


lez162>164-062015-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
930 am edt thu aug 6 2026

.this afternoon...southwest winds 10 knots or less. a chance of
showers and thunderstorms late. waves 1 foot or less. 
.tonight...south winds 10 knots or less becoming southwest. a
slight chance of showers and thunderstorms late in the evening. a
chance of showers and thunderstorms after midnight, then a chance
of showers with a slight chance of thunderstorms late. waves
1 foot or less. 
.friday...southwest winds 5 to 10 knots becoming south. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.friday night...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 15 knots becoming northwest. a
chance of showers during the day. waves 1 to 2 feet. 
.sunday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms sunday night. waves 2 feet or less. 
.monday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely monday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 061330
glfle 
expires:202608062015;;715126

open lake forecast for lake erie
national weather service cleveland oh
930 am edt thu aug 6 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 30.00 inches will remain just northwest of the
lake today. another trough averaging 29.90 inches will enter the
great lakes region friday into saturday and extend a cold front
across the lake on saturday night. a ridge averaging 30.00 inches
will briefly build into the region on sunday and a warm front will
cross the lake. low pressure 29.80 inches will enter the great
lakes for monday.


lez061-168-169-062015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
930 am edt thu aug 6 2026

.this afternoon...southwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...southwest winds 10 knots or less becoming south. a
slight chance of showers and thunderstorms late. waves 1 foot or
less. 
.friday...south winds 5 to 10 knots becoming southwest. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.friday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms in the evening, then showers likely
with a chance of thunderstorms overnight. waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. showers
likely with a chance of thunderstorms sunday night. waves 1 to
2 feet. 
.monday...southwest winds around 10 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers monday night. waves 1 to 3 feet building to 2 to
4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 061330
glfle 
expires:202608062015;;715125

open lake forecast for lake erie
national weather service cleveland oh
930 am edt thu aug 6 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a trough averaging 30.00 inches will remain just northwest of the
lake today. another trough averaging 29.90 inches will enter the
great lakes region friday into saturday and extend a cold front
across the lake on saturday night. a ridge averaging 30.00 inches
will briefly build into the region on sunday and a warm front will
cross the lake. low pressure 29.80 inches will enter the great
lakes for monday.


lez165>167-062015-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
930 am edt thu aug 6 2026

.this afternoon...southwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...west winds 10 knots or less becoming south. a slight
chance of showers and thunderstorms after midnight. a chance of
showers with a slight chance of thunderstorms late. waves 1 foot
or less. 
.friday...south winds 5 to 10 knots becoming southwest. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.friday night...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms. waves 1 to 3 feet. 
.saturday...southwest winds 10 to 15 knots becoming northwest. a
chance of showers during the day. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. showers
likely with a chance of thunderstorms sunday night. waves 1 to
3 feet. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely monday night. waves 1 to 3 feet building to
2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 061350
glflh 
expires:202608062200;;715557

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am edt thu aug 6 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...another round of showers and thunderstorms is possible
this afternoon and evening as a cold front slowly drifts across
the great lakes. brief period of high pressure, 30.00 inches,
fills in overnight ahead of the next cold front which tracks
through this weekend.


lhz362-363-062200-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
950 am edt thu aug 6 2026

.rest of today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds. waves 2 feet or less. 
.friday...light and variable winds becoming southeast 5 to
10 knots in the late morning and afternoon. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming light and
variable. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers . waves 1 to 3 feet. 
.monday...light and variable winds becoming west 5 to 10 knots
until early evening...then backing to the southeast by midnight.
a chance of showers. waves 2 feet or less. 


$$

fzus63 kdtx 061350
glflh 
expires:202608062200;;715558

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am edt thu aug 6 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...another round of showers and thunderstorms is possible
this afternoon and evening as a cold front slowly drifts across
the great lakes. brief period of high pressure, 30.00 inches,
fills in overnight ahead of the next cold front which tracks
through this weekend.


lhz462>464-062200-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
950 am edt thu aug 6 2026

.rest of today...light and variable winds becoming north 5 to
10 knots late in the afternoon. waves 2 feet or less. 
.tonight...northeast winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots
in the late morning and afternoon. a chance of showers in the
afternoon. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots veering to the west
late in the afternoon...then becoming light and variable late in
the evening. a chance of showers. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers .
waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots backing to the east by
midnight. a chance of showers early in the morning...then a
chance of thunderstorms until early evening. rain showers likely.
waves 2 feet or less. 


$$

fzus63 kdtx 061350
glfsc 
expires:202608062200;;715561

lake st clair forecast
national weather service detroit/pontiac mi
950 am edt thu aug 6 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...another round of showers and thunderstorms is possible
this afternoon and evening as a cold front slowly drifts across
the great lakes. brief period of high pressure, 30.00 inches,
fills in overnight ahead of the next cold front which tracks
through this weekend.


lcz460-062200-
lake st clair-
950 am edt thu aug 6 2026

.rest of today...light and variable winds becoming south 5 to 10
knots in the afternoon. partly sunny. scattered showers and
thunderstorms late in the afternoon. waves 2 feet or less.
.tonight...south winds 5 to 10 knots. mostly cloudy. scattered
thunderstorms early in the evening. scattered light showers. waves 2
feet or less.
.friday...south winds 5 to 10 knots. mostly cloudy. a chance of
light showers in the late morning and afternoon. a chance of
thunderstorms early in the afternoon. waves 2 feet or less.
.friday night...southwest winds 5 to 10 knots. partly cloudy. a
chance of showers and thunderstorms . waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots increasing to 10 to 15
knots in the afternoon...then becoming west 5 to 10 knots in the
evening. partly sunny in the morning...then mostly clear with a
chance of showers and thunderstorms in the afternoon and evening.
waves 2 feet or less.
.sunday...southwest winds 10 to 15 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.
.monday...southwest winds 15 to 20 knots. showers and a chance of
thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 061350
glflh 
expires:202608062200;;715556

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am edt thu aug 6 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...another round of showers and thunderstorms is possible
this afternoon and evening as a cold front slowly drifts across
the great lakes. brief period of high pressure, 30.00 inches,
fills in overnight ahead of the next cold front which tracks
through this weekend.


lhz361-062200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
950 am edt thu aug 6 2026

.rest of today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds becoming southeast 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.friday...south winds 5 to 10 knots early in the morning becoming
light and variable...then becoming east 5 to 10 knots early in
the afternoon. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots in the morning becoming
west 10 to 15 knots...then decreasing to 5 to 10 knots late in
the afternoon becoming light and variable. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers by midnight. waves 2 feet or less. 
.monday...light and variable winds becoming northwest 5 to
10 knots in the late morning and early afternoon...then backing
to the west early in the evening veering to the northwest by
midnight. a chance of showers. waves 2 feet or less. 


$$

fzus63 kmkx 061359
glflm 
expires:202608062115;;715834

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt thu aug 6 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

light winds are expected today as high pressure of 30.0 inches 
gradually moves through the region. patchy fog is ongoing over
northwest portions of lake michigan. light south winds will 
develop tonight, then increase by friday afternoon as the high 
departs to the east and low pressure of 29.8 inches reaches lake 
superior from the west. scattered showers and storms are possible 
friday night as the low drags a cold front across the lake. west 
to northwest winds behind the front later friday night into early 
saturday will quickly return to southerly by saturday evening 
ahead of the next approaching low pressure system.


lmz080-669-671-673-675-777-779-870-872-874-876-878-062115-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
859 am cdt thu aug 6 2026

sheboygan wi to pentwater mi south...

.rest of today...east winds 5 to 10 kt becoming southeast. slight
chance of showers through mid morning. waves 1 ft or less. 
.tonight...southeast winds 5 to 10 kt veering to southwest.
patchy fog overnight. waves nearly calm. 
.friday...southwest winds 5 to 10 kt becoming south 10 to 20 kt.
waves 1 ft or less building to 2 to 4 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.saturday night...south winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...south winds 10 to 20 kt. chance of showers. waves 1 to
3 ft. 
.monday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
showers likely with a chance of thunderstorms. waves 2 to 4 ft.  

$$

fzus63 kmkx 061359
glflm 
expires:202608062115;;715833

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt thu aug 6 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

light winds are expected today as high pressure of 30.0 inches 
gradually moves through the region. patchy fog is ongoing over
northwest portions of lake michigan. light south winds will 
develop tonight, then increase by friday afternoon as the high 
departs to the east and low pressure of 29.8 inches reaches lake 
superior from the west. scattered showers and storms are possible 
friday night as the low drags a cold front across the lake. west 
to northwest winds behind the front later friday night into early 
saturday will quickly return to southerly by saturday evening 
ahead of the next approaching low pressure system.


lmz261-362-364-366-563-565-567-868-062115-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
859 am cdt thu aug 6 2026

sheboygan wi to pentwater mi north...

.rest of today...southeast winds less than 10 kt increasing to
5 to 10 kt. waves 1 ft or less. 
.tonight...southeast winds 5 to 10 kt becoming southwest. waves
1 ft or less. 
.friday...south winds 10 to 15 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming west. waves 1 to
3 ft. 
.saturday night...southwest winds 10 to 20 kt diminishing to
10 to 15 kt. waves 1 to 2 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...northeast winds 10 to 20 kt veering to south 15 to
25 kt. chance of showers and thunderstorms. waves 1 to 3 ft. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715991

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz162-062000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt thu aug 6 2026 /901 am cdt thu aug 6 2026/

.rest of today...southwest winds 15 to 25 knots backing south
late. waves 1 to 3 feet building to 2 to 4 feet, then subsiding
to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots veering southwest after
midnight, then diminishing to 10 to 20 knots late. a slight
chance of showers and thunderstorms after midnight. waves 1 to
3 feet. 
.friday...southwest winds 10 to 20 knots veering west late. a
chance of showers and a slight chance of thunderstorms. waves
subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday night...west winds 5 to 15 knots veering northwest
after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots veering north. waves calm
to 2 feet. 
.monday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715992

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz263-062000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 am edt thu aug 6 2026

.rest of today...southwest winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon, then becoming south 15 to
25 knots late. waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...south winds 15 to 25 knots veering southwest late.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots. a chance of showers and
thunderstorms. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a slight chance of
showers through midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet. 
.saturday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715993

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz264-062000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt thu aug 6 2026

.rest of today...southwest winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then backing south late. waves
1 to 3 feet building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots becoming south 5 to
15 knots late. a chance of showers and a slight chance of
thunderstorms. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a slight chance of
showers through midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet. 
.saturday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715994

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz265-062000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt thu aug 6 2026

.rest of today...south winds 10 to 20 knots backing southeast
late. waves calm to 2 feet. 
.tonight...south winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.friday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots. showers likely and a
slight chance of thunderstorms through midnight. waves calm to
2 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 10 to 20 knots veering west
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715995

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz266-062000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 am edt thu aug 6 2026

.rest of today...south winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then becoming southeast 10 to 20 knots
late. waves calm to 2 feet building to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a chance of showers and a slight
chance of thunderstorms by mid afternoon. waves subsiding to calm
to 2 feet. 
.friday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. showers and a slight chance of
thunderstorms through midnight, then a slight chance of showers
after midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 061401
glfls 
expires:202608062000;;715996

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu aug 6 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.1 inch high over the upper great lakes today keeps 30.0 inch 
ridging over lake superior until tonight as the weak high travels 
east towards the st. lawrence river. by friday, a cold front brings 
29.8 inch troughing across the lake before 29.9 inch ridging returns 
with a high digging towards chicago late friday night into saturday. 
while some weak 29.8 inch troughing could be seen over lake superior 
saturday night, weak 29.9 inch ridging settles once again over the 
lake sunday and monday. the high pressure ridging could increase to 
30.0 inches by tuesday. 




lsz267-062000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt thu aug 6 2026

.rest of today...south winds 5 to 15 knots backing southeast
late. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots. waves building to 1 to
3 feet. 
.friday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.friday night...south winds 10 to 20 knots veering west after
midnight. showers through midnight. a slight chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$