fzus61 kbuf 050802
glflo 
expires:202609051500;;936458

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat sep 5 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 high pressure ridge averaging 30.1 inches builds gradually from 
northern ontario through monday. a cold front will sweep southward 
across lake ontario tuesday. behind the front, another ridge 
averaging 30.1 inches builds from near james bay through tuesday 
night. on wednesday, the ridge should exit southeastward and allow a 
warm front to sweep northeastward across lake ontario.


loz063>065-051500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat sep 5 2026

.today...north winds 5 to 10 knots. waves 1 foot or less. 
.tonight...north winds 5 to 15 knots becoming northeast. waves
1 to 3 feet. 
.sunday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...north winds 10 knots or less becoming northwest.
waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.tuesday...southwest winds 10 knots or less becoming south 10 to
15 knots. a chance of showers tuesday night. waves 2 feet or
less. 
.wednesday...south winds 15 to 25 knots becoming west. showers
likely. waves 2 to 4 feet building to 3 to 6 feet. 

$$

fzus61 kbuf 050802
glflo 
expires:202609051500;;936457

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat sep 5 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 high pressure ridge averaging 30.1 inches builds gradually from 
northern ontario through monday. a cold front will sweep southward 
across lake ontario tuesday. behind the front, another ridge 
averaging 30.1 inches builds from near james bay through tuesday 
night. on wednesday, the ridge should exit southeastward and allow a 
warm front to sweep northeastward across lake ontario.


loz062-051500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat sep 5 2026

.today...north winds around 10 knots becoming light and variable.
waves 1 foot or less. 
.tonight...north winds 10 knots or less becoming northeast 10 to
15 knots. waves 2 feet or less. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.sunday night...southeast winds less than 10 knots. waves 1 foot
or less. 
.monday...west winds less than 10 knots becoming southwest. waves
1 foot or less. 
.tuesday...light and variable winds becoming south 10 to
15 knots. a chance of showers tuesday night. waves 2 feet or
less. 
.wednesday...southwest winds 15 to 20 knots becoming west.
showers likely. waves 2 to 4 feet building to 4 to 7 feet, then
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 

$$

fzus61 kcle 050743
glfle 
expires:202609051415;;935980

open lake forecast for lake erie
national weather service cleveland oh
343 am edt sat sep 5 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 cold front continues to move south of lake erie through today. 
high pressure 30.20 inches gradually builds into the lake through
early next week.



lez164>167-051415-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
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-
343 am edt sat sep 5 2026

.today...northeast winds 10 to 15 knots. a slight chance of
showers this morning. waves 1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots. a slight chance of
showers after midnight. waves 1 to 3 feet. 
.sunday...east winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 15 to 20 knots becoming east 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.tuesday...southeast winds 10 knots or less becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west. a
chance of showers during the day. waves 3 to 6 feet. 

$$

fzus61 kcle 050743
glfle 
expires:202609051415;;935981

open lake forecast for lake erie
national weather service cleveland oh
343 am edt sat sep 5 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 cold front continues to move south of lake erie through today. 
high pressure 30.20 inches gradually builds into the lake through
early next week.



lez061-168-169-051415-
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-
343 am edt sat sep 5 2026

.today...northeast winds 5 to 10 knots. waves 2 feet or less. 
.tonight...northeast winds 5 to 15 knots. a slight chance of
showers after midnight. waves 2 feet or less. 
.sunday...east winds 5 to 15 knots becoming northeast. waves 1 to
3 feet. 
.sunday night...northeast winds 5 to 15 knots becoming east.
waves 1 to 3 feet. 
.monday...east winds 5 to 10 knots becoming southeast. waves
1 foot or less. 
.tuesday...southeast winds less than 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 foot or less building to
1 to 3 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west. a
chance of showers. waves 2 to 4 feet building to 3 to 6 feet. 

$$

fzus61 kcle 050743
glfle 
expires:202609051415;;935979

open lake forecast for lake erie
national weather service cleveland oh
343 am edt sat sep 5 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 cold front continues to move south of lake erie through today. 
high pressure 30.20 inches gradually builds into the lake through
early next week.



lez162-163-051415-
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-
343 am edt sat sep 5 2026

.today...northeast winds 10 to 15 knots. a chance of showers
early, then a slight chance of showers late this morning. waves
1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots. a slight chance of
showers late. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 10 to 15 knots becoming east.
waves 1 to 3 feet. 
.monday...east winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming south 15 to
20 knots. waves 2 feet or less. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet. 

$$

fzus63 kdtx 050718
glfsc 
expires:202609051530;;935291

lake st clair forecast
national weather service detroit/pontiac mi
318 am edt sat sep 5 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...a large area of high pressure anchored over ontario
will usher cooler, drier northeast flow to start this weekend.
more tranquil conditions by sunday into monday as the high drifts
overhead.


lcz460-051530-
lake st clair-
318 am edt sat sep 5 2026

.today...northeast winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon...then increasing to 10 to 15 knots late in
the afternoon. partly sunny in the morning then clearing. waves 2
feet or less.
.tonight...north winds 15 to 20 knots becoming northeast 10 to 15
knots after midnight. mostly clear. waves 2 feet or less.
.sunday...northeast winds 10 to 15 knots diminishing to 5 to 10
knots in the late morning and afternoon. mostly sunny. waves 2 feet
or less.
.sunday night...northeast winds 10 to 15 knots diminishing to 5 to
10 knots in the late evening and overnight. mostly clear. waves 2
feet or less.
.monday...east winds 5 to 10 knots veering to the southeast in the
evening. mostly clear. waves 2 feet or less.
.tuesday...south winds 10 to 15 knots. partly cloudy. waves 2 feet
or less.
.wednesday...west winds 15 to 20 knots. partly cloudy. waves 1 to 3
feet.

$$

fzus63 kdtx 050717
glflh 
expires:202609051530;;935266

open lake forecast for lake huron
national weather service detroit/pontiac mi
317 am edt sat sep 5 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...a large area of high pressure anchored over ontario
will usher cooler, drier northeast flow to start this weekend.
more tranquil conditions by sunday into monday as the high drifts
overhead.


lhz463-464-051530-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
317 am edt sat sep 5 2026

.today...northeast winds 5 to 10 knots becoming north 10 to
15 knots late in the afternoon. waves 1 to 3 feet. 
.tonight...north winds 15 to 20 knots becoming northeast 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...north winds 10 to 15 knots becoming northeast
5 to 10 knots in the late evening and overnight. waves 2 feet or
less. 
.monday...light and variable winds becoming east 5 to 10 knots
late in the evening. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots becoming south 15 to
20 knots. a chance of. waves 1 to 3 feet building to 2 to 4 feet
by midnight. 
.wednesday...southwest winds 15 to 20 knots veering to the west
by midnight. a chance of showers until afternoon. waves 2 to
4 feet. 


$$

fzus63 kdtx 050717
glflh 
expires:202609051530;;935265

open lake forecast for lake huron
national weather service detroit/pontiac mi
317 am edt sat sep 5 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...a large area of high pressure anchored over ontario
will usher cooler, drier northeast flow to start this weekend.
more tranquil conditions by sunday into monday as the high drifts
overhead.


lhz363-462-051530-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
317 am edt sat sep 5 2026

.today...northeast winds 5 to 10 knots. waves 2 feet or less. 
.tonight...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.monday...light and variable winds becoming southeast 5 to
10 knots late in the evening. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers by midnight. waves 1 to 3 feet
building to 3 to 5 feet by midnight. 
.wednesday...southwest winds 15 to 20 knots veering to the west
by midnight. gusts to 30 knots. a chance of showers until
afternoon. waves 4 to 6 feet. waves occasionally around 8 feet. 


$$

fzus63 kdtx 050717
glflh 
expires:202609051530;;935264

open lake forecast for lake huron
national weather service detroit/pontiac mi
317 am edt sat sep 5 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...a large area of high pressure anchored over ontario
will usher cooler, drier northeast flow to start this weekend.
more tranquil conditions by sunday into monday as the high drifts
overhead.


lhz361-362-051530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
317 am edt sat sep 5 2026

.today...northeast winds 5 to 10 knots in the morning becoming
light and variable. waves 2 feet or less. 
.tonight...light and variable winds. waves 2 feet or less. 
.sunday...light and variable winds. waves 2 feet or less. 
.sunday night...light and variable winds. waves 2 feet or less. 
.monday...light and variable winds becoming southeast 5 to
10 knots late in the afternoon. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 3 to
5 feet . 
.wednesday...southwest winds 15 to 20 knots veering to the west
by midnight. gusts to 35 knot gales. showers and a chance of
thunderstorms early in the morning...then a chance of showers in
the late morning and early afternoon. waves 4 to 6 feet. waves
occasionally around 8 feet. 


$$

fzus63 kmkx 050753
glflm 
expires:202609051515;;936154

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 am cdt sat sep 5 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 over lake michigan will shift east-northeasterly 
early this morning as a cold front gradually slides southward. 
areas of fog may form over central and southern lake michigan 
after the frontal passage, clearing out later this morning. 

high pressure around 30.1 inches builds over the great lakes from
ontario through the weekend, bringing modest northeast winds for
central and southern portions of lake michigan today. winds 
eventually weaken and become more light and variable for sunday 
and monday as the high pressure system settles closer to the
region. 


lmz261-362-364-366-563-565-567-868-051515-
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-
253 am cdt sat sep 5 2026

sheboygan wi to pentwater mi north...

.today...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
patchy dense fog this morning. waves 1 to 3 ft. 
.tonight...northeast winds 10 to 20 kt becoming east 10 to 15 kt
after midnight, then diminishing to 5 to 10 kt late. waves 2 to
4 ft. 
.sunday...east winds 5 to 10 kt becoming northeast. waves 1 to
3 ft subsiding to 1 to 2 ft. 
.sunday night...east winds 10 to 15 kt becoming southeast. waves
1 to 2 ft. 
.monday...south winds 5 to 10 kt increasing to 10 to 15 kt. waves
1 to 2 ft. 
.monday night...southeast winds 5 to 10 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...south winds 15 to 25 kt increasing to 30 kt. chance of
showers. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.wednesday...southwest gales to 35 kt becoming west. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.  

$$

fzus63 kmkx 050753
glflm 
expires:202609051515;;936155

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 am cdt sat sep 5 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 over lake michigan will shift east-northeasterly 
early this morning as a cold front gradually slides southward. 
areas of fog may form over central and southern lake michigan 
after the frontal passage, clearing out later this morning. 

high pressure around 30.1 inches builds over the great lakes from
ontario through the weekend, bringing modest northeast winds for
central and southern portions of lake michigan today. winds 
eventually weaken and become more light and variable for sunday 
and monday as the high pressure system settles closer to the
region. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-051515-
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-
253 am cdt sat sep 5 2026

sheboygan wi to pentwater mi south...

.today...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
patchy dense fog this morning. waves 1 to 3 ft. 
.tonight...north winds 10 to 20 kt becoming east 10 to 15 kt.
waves 2 to 4 ft. 
.sunday...east winds 10 to 15 kt becoming northeast. waves 2 to
4 ft subsiding to 1 to 2 ft. 
.sunday night...northeast winds 10 to 15 kt becoming southeast.
waves 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt. waves 1 to 2 ft. 
.monday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft. 
.wednesday...southwest winds to 30 kt becoming west. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.  

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936316

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz264-052000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt sat sep 5 2026

.early this morning...northeast winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.today...east winds 5 to 15 knots. patchy fog. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots diminishing to less than
10 knots after midnight. patchy fog. waves calm to 2 feet. 
.sunday...southeast winds less than 10 knots. waves calm to
2 feet. 
.sunday night...southeast winds 5 to 15 knots. a slight chance of
showers after midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of showers through
midnight, then showers likely after midnight. waves building to
3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots becoming southwest gales to
40 knots. showers. a chance of thunderstorms. a chance of
showers. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936317

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz265-052000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt sat sep 5 2026

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...east winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.sunday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.monday...southeast winds 10 to 20 knots. waves calm to 2 feet. 
.monday night...southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. showers likely after midnight.
waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 40 knots veering southwest. showers. a
chance of thunderstorms. a chance of showers. waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936314

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat sep 5 2026 /300 am cdt sat sep 5 2026/

.early this morning...northeast winds 10 to 20 knots. patchy fog.
a slight chance of showers. waves 1 to 3 feet subsiding to calm
to 2 feet. 
.today...northeast winds 10 to 20 knots. patchy fog through early
afternoon. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. a chance of showers. waves calm to 2 feet. 
.monday night...east winds 20 to 30 knots veering south after
midnight. showers and a chance of thunderstorms. waves building
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 20 to 30 knots becoming west gales to
35 knots. showers likely. a chance of thunderstorms. a chance of
showers. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.wednesday...west gales to 40 knots becoming northwest gales to
35 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936319

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz267-052000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt sat sep 5 2026

.early this morning...east winds 10 to 20 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots backing north late. waves calm
to 2 feet. 
.tonight...north winds 10 to 20 knots becoming east 5 to 15 knots
after midnight, then veering southeast late. patchy fog after
midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming northeast 5 to 15 knots
late. patchy fog through early afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of showers after
midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots. showers. a chance of
thunderstorms. waves building to 3 to 6 feet occasionally to
8 feet. 
.wednesday...west gales to 40 knots becoming northwest gales to
35 knots. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936318

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz266-052000-
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-
400 am edt sat sep 5 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots backing northeast late. waves
calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots becoming east less than
10 knots after midnight, then becoming southeast 5 to 15 knots
late. patchy fog after midnight. waves calm to 2 feet. 
.sunday...southeast winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing east late. patchy dense
fog through early afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. a chance of showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 40 knots. showers. a chance of showers.
waves building to 4 to 8 feet occasionally to 10 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202609052000;;936315

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat sep 5 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...

high pressure ridging builds to 30.1 inches over lake superior by 
this afternoon, remaining through sunday night. the ridge briefly 
builds further to 30.2 inches on monday as a 30.4 inch high passes 
eastward over far northern ontario. meanwhile, a 29.6 inch low 
develops off the northern rockies. the low then tracks northeast to 
james bay, deepening to 29.3 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday.




lsz263-052000-
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-
400 am edt sat sep 5 2026

.early this morning...northeast winds 5 to 15 knots. patchy fog.
waves 1 to 3 feet subsiding to calm to 2 feet. 
.today...northeast winds 5 to 15 knots increasing to 10 to
20 knots late. patchy dense fog through early afternoon. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming southeast less than
10 knots late. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves calm to 2 feet. 
.monday...southeast winds 10 to 20 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 20 to 30 knots becoming south
gales to 35 knots after midnight. a chance of showers through
midnight, then showers after midnight. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots becoming southwest gales to
40 knots. a chance of showers and thunderstorms. waves subsiding
to 3 to 5 feet occasionally to 7 feet, then building to 5 to
8 feet occasionally to 10 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 2 to 4 feet. 

$$