fzus61 kbuf 210802
glflo 
expires:202609211500;;807494

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon sep 21 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...
an expansive 30.4 inch high over ontario province will build east 
across quebec and strengthen to 30.7 inches through wednesday. the 
high will then slowly retrograde westward to the upper great lakes 
and weaken to 30.4 inches thursday and friday while a 29.3 inch low 
develops and moves northward off the mid-atlantic coastline.


loz063>065-211500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon sep 21 2026

.today...northeast winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tonight...northeast winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 6 feet. 
.tuesday...northeast winds 15 to 20 knots. waves 3 to 6 feet. 
.tuesday night...northeast winds 15 to 20 knots becoming east.
waves 3 to 6 feet. 
.wednesday...east winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.thursday...east winds 10 to 15 knots becoming northeast. waves
1 to 3 feet. 
.friday...northeast winds 10 to 15 knots becoming north. waves
1 to 3 feet. 

$$

fzus61 kbuf 210802
glflo 
expires:202609211500;;807493

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon sep 21 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...
an expansive 30.4 inch high over ontario province will build east 
across quebec and strengthen to 30.7 inches through wednesday. the 
high will then slowly retrograde westward to the upper great lakes 
and weaken to 30.4 inches thursday and friday while a 29.3 inch low 
develops and moves northward off the mid-atlantic coastline.


loz062-211500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon sep 21 2026

.today...northeast winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tonight...northeast winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 6 feet. 
.tuesday...northeast winds 20 to 25 knots becoming east. waves
5 to 8 feet. waves occasionally around 10 feet. 
.tuesday night...east winds 15 to 25 knots. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.wednesday...east winds 15 to 20 knots. waves 4 to 6 feet
subsiding to 2 to 4 feet. 
.thursday...east winds 10 to 15 knots becoming northeast around
10 knots. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.friday...northeast winds 5 to 15 knots becoming north. waves
2 feet or less. 

$$

fzus61 kcle 210750
glfle 
expires:202609211415;;807207

open lake forecast for lake erie
national weather service cleveland oh
350 am edt mon sep 21 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...
lake erie will reside be between high pressure 30.40 inches to 
the north and low pressure 29.90 inches over the ohio valley for
at least the first half of the week. high pressure 30.20 inches 
will expand south over lake erie thursday night into friday and
persist through the weekend. 


lez061-169-211415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
350 am edt mon sep 21 2026

.today...northeast winds 15 to 25 knots. waves 3 to 6 feet
building to 4 to 7 feet, then subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.tonight...northeast winds 20 to 25 knots becoming east. waves
4 to 7 feet. waves occasionally around 9 feet. 
.tuesday...east winds 15 to 25 knots becoming northeast. waves
4 to 7 feet. waves occasionally around 9 feet. 
.tuesday night...east winds 15 to 25 knots. a chance of showers
overnight. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.wednesday...east winds 15 to 20 knots. a chance of showers
during the day. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...east winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kcle 210750
glfle 
expires:202609211415;;807205

open lake forecast for lake erie
national weather service cleveland oh
350 am edt mon sep 21 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...
lake erie will reside be between high pressure 30.40 inches to 
the north and low pressure 29.90 inches over the ohio valley for
at least the first half of the week. high pressure 30.20 inches 
will expand south over lake erie thursday night into friday and
persist through the weekend. 


lez162-163-211415-
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-
350 am edt mon sep 21 2026

.today...northeast winds 20 to 25 knots. a chance of showers. 
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally 
around 10 feet. 
.tonight...northeast winds 20 to 25 knots. a slight chance of
showers. a slight chance of waterspouts after midnight. waves
5 to 8 feet. waves occasionally around 10 feet. 
.tuesday...northeast winds to 30 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.tuesday night...northeast winds to 30 knots becoming east. a
chance of showers. waves 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday...east winds 15 to 25 knots. a chance of showers
during the day. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.thursday...east winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 210750
glfle 
expires:202609211415;;807206

open lake forecast for lake erie
national weather service cleveland oh
350 am edt mon sep 21 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...
lake erie will reside be between high pressure 30.40 inches to 
the north and low pressure 29.90 inches over the ohio valley for
at least the first half of the week. high pressure 30.20 inches 
will expand south over lake erie thursday night into friday and
persist through the weekend. 


lez164>168-211415-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
350 am edt mon sep 21 2026

.today...east winds 20 to 25 knots becoming northeast. a slight
chance of showers. waves 5 to 9 feet. waves occasionally around
11 feet. 
.tonight...northeast winds to 30 knots becoming east. a slight
chance of showers through the early overnight. waves 6 to 9 feet.
waves occasionally around 11 feet. 
.tuesday...east winds to 30 knots. waves 6 to 9 feet. waves
occasionally around 11 feet. 
.tuesday night...east winds to 30 knots diminishing to 15 to
25 knots. a chance of showers overnight. waves 5 to 9 feet. waves
occasionally around 11 feet. 
.wednesday...east winds 15 to 25 knots. a chance of showers
during the day. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.thursday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 

$$

fzus63 kdtx 210704
glfsc 
expires:202609211515;;805586

lake st clair forecast
national weather service detroit/pontiac mi
304 am edt mon sep 21 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...high pressure, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lcz460-211515-
lake st clair-
304 am edt mon sep 21 2026

...small craft advisory in effect through wednesday evening...

.today...northeast winds 20 to 25 knots diminishing to 15 to 20
knots in the late morning and afternoon. mostly cloudy. waves 2 to 4
feet subsiding to 1 to 3 feet in the late morning and afternoon.
.tonight...northeast winds 20 to 25 knots. gusts to 30 knots by
midnight. mostly cloudy this evening becoming partly cloudy. waves 2
to 4 feet building to 3 to 5 feet in the late evening and overnight.
waves occasionally around 7 feet.
.tuesday...northeast winds 20 to 25 knots diminishing to 15 to 20
knots early in the afternoon. partly sunny. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon.
.tuesday night...northeast winds to 30 knots with gusts to 35 knot
gales. partly cloudy early in the evening becoming mostly cloudy.
waves 3 to 5 feet. waves occasionally around 7 feet.  a gale warning
may be needed.
.wednesday...northeast winds 20 to 25 knots becoming east 15 to 20
knots in the afternoon...then increasing to 20 to 25 knots in the
evening. partly cloudy. waves 2 to 4 feet.
.thursday...east winds 20 to 25 knots. mostly clear. waves 1 to 3
feet.
.friday...north winds 10 to 15 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 210704
glflh 
expires:202609211515;;805582

open lake forecast for lake huron
national weather service detroit/pontiac mi
304 am edt mon sep 21 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...high pressure, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz361-362-211515-
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-
304 am edt mon sep 21 2026

.today...northeast winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.tonight...northeast winds 10 to 15 knots increasing to 15 to
20 knots after midnight. waves 3 to 5 feet. 
.tuesday...east winds 15 to 20 knots decreasing to 10 to 15 knots
early in the afternoon. waves 3 to 5 feet. 
.tuesday night...northeast winds 10 to 15 knots becoming east
15 to 20 knots in the late evening and overnight. waves 3 to
5 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots. waves 3 to 5 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
. waves 1 to 3 feet. 
.friday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 210704
glflh 
expires:202609211515;;805583

open lake forecast for lake huron
national weather service detroit/pontiac mi
304 am edt mon sep 21 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...high pressure, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz363-462>464-211515-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
304 am edt mon sep 21 2026

.today...northeast winds 20 to 25 knots decreasing to 15 to
20 knots in the late morning and afternoon. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.tonight...northeast winds 15 to 20 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.tuesday...northeast winds 15 to 20 knots. gusts to 30 knots
early in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.tuesday night...northeast winds 15 to 20 knots. waves 4 to
6 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots late in the morning...then becoming northeast 15 to
20 knots late in the afternoon becoming east 10 to 15 knots late
in the evening. waves 3 to 5 feet. waves occasionally around
8 feet. 
.thursday...east winds 10 to 15 knots becoming northeast 5 to
10 knots . waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...east winds 5 to 10 knots backing to the north . waves
2 feet or less. 


$$

fzus63 kmkx 210827
glflm 
expires:202609211515;;808810

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
327 am cdt mon sep 21 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...

high pressure around 30.4 inches north of lake superior today 
will shift eastward into quebec tonight. the high will then 
largely remain in place through the middle of the week, while 
strengthening to around 30.7 inches. gusty easterly winds are
expected today into tuesday, with east to northeast winds on
wednesday. a few gale force gusts may occur at times today, 
mainly over southern portions of the lake. 

due to prevailing easterly flow, waves continue to build and 
impact western portions of the lake through the middle of the 
week. winds then look to diminish toward the end of the week, as 
the high pressure system slowly weakens and moves farther east.

the influence of the high should linger through the end of the 
week, with generally lighter easterly winds expected over the 
lake. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
327 am cdt mon sep 21 2026

sheboygan wi to pentwater mi south...

.today...east winds to 30 kt becoming northeast 15 to 25 kt.
slight chance of sprinkles this morning. waves 7 to 10 ft
occasionally to 13 ft. 
.tonight...northeast winds 15 to 25 kt becoming east. waves 5 to
8 ft occasionally to 10 ft. 
.tuesday...east winds 15 to 25 kt becoming northeast. waves 4 to
7 ft occasionally to 9 ft. 
.tuesday night...east winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
4 to 7 ft occasionally to 9 ft. 
.wednesday night...east winds 10 to 20 kt. waves 3 to 5 ft. 
.thursday...east winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 3 to 5 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft.  

$$

fzus63 kmkx 210827
glflm 
expires:202609211515;;808809

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
327 am cdt mon sep 21 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...

high pressure around 30.4 inches north of lake superior today 
will shift eastward into quebec tonight. the high will then 
largely remain in place through the middle of the week, while 
strengthening to around 30.7 inches. gusty easterly winds are
expected today into tuesday, with east to northeast winds on
wednesday. a few gale force gusts may occur at times today, 
mainly over southern portions of the lake. 

due to prevailing easterly flow, waves continue to build and 
impact western portions of the lake through the middle of the 
week. winds then look to diminish toward the end of the week, as 
the high pressure system slowly weakens and moves farther east.

the influence of the high should linger through the end of the 
week, with generally lighter easterly winds expected over the 
lake. 


lmz261-362-364-366-563-565-567-868-211515-
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-
327 am cdt mon sep 21 2026

sheboygan wi to pentwater mi north...

.today...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.tonight...northeast winds 15 to 25 kt becoming east 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 3 to 5 ft. 
.tuesday night...east winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...east winds 10 to 20 kt becoming northeast 15 to
25 kt. waves 2 to 4 ft. 
.wednesday night...east winds 15 to 25 kt becoming southeast
10 to 20 kt. waves 2 to 4 ft. 
.thursday...east winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday...southeast winds 5 to 10 kt becoming east 10 to 15 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807389

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz162-212000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon sep 21 2026 /301 am cdt mon sep 21 2026/

.early this morning...east winds 10 to 20 knots. waves calm to
2 feet. 
.today...east winds 10 to 20 knots becoming northeast 15 to
25 knots late. waves building to 1 to 3 feet. 
.tonight...east winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then becoming northeast 15 to 25 knots late.
waves building to 1 to 3 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots veering south after
midnight. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday...south winds 5 to 15 knots backing east. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807390

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz263-212000-
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-
401 am edt mon sep 21 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...east winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 1 to 3 feet. 
.tonight...east winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then veering southeast late. waves subsiding to
calm to 2 feet. 
.tuesday...east winds less than 10 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807391

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz264-212000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon sep 21 2026

.early this morning...east 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 diminishing to less than
10 knots late. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...southwest winds less than 10 knots becoming southeast
5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807392

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz265-212000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon sep 21 2026

.early this morning...east winds 15 to 25 knots. waves 2 to
4 feet. 
.today...east winds 15 to 25 knots diminishing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.tonight...east winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.thursday...southeast winds 10 to 20 knots becoming south 5 to
15 knots. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807393

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz266-212000-
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-
401 am edt mon sep 21 2026

.early this morning...east winds 10 to 20 knots. waves 2 to
4 feet. 
.today...east winds 10 to 20 knots backing northeast late. waves
subsiding to calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots veering east late. waves
calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 210801
glfls 
expires:202609212000;;807394

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 21 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 30.3 inch centered over southern ontario this morning builds to 
30.4 inches as it moves east toward the ontario-quebec border, 
resulting in veering flow from northeasterly to easterly of less 
than 20 knots over lake superior. the high slowly builds to 30.5 
inches as it shifts into quebec by midday tuesday, trailing a 30.4 
inch ridge over lake superior while surface winds persist as 
easterly. the high builds further to 30.6 inches by wednesday, 
remaining through wednesday night before weakening to 30.4 inches by 
thursday night. meanwhile, veering winds continue on to become 
southerly by thursday afternoon. by late friday, the high weakens to 
30.3 inches over the eastern great lakes basin as 29.5 inch low 
pressure develops over montana.




lsz267-212000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon sep 21 2026

.early this morning...east winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.today...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing northeast late. waves subsiding to
calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing northeast late. waves calm to
2 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$