fzus61 kbuf 201402
glflo 
expires:202609202100;;766996

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun sep 20 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 29.9 inch inverted trough draped from the ohio valley to new york 
state will drift southeastward and away from the lake this afternoon 
and tonight as a 30.4 inch high builds southeastward across ontario 
province. this high will then strengthen to 30.6 inches as it slowly 
drifts across quebec through thursday.


loz063>065-202100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun sep 20 2026

.rest of today...northeast winds 10 to 15 knots. a chance of
showers late this morning. waves 1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.monday night...northeast winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 6 feet. 
.tuesday...east winds 15 to 20 knots. waves 3 to 6 feet. 
.wednesday...east winds 15 to 20 knots. waves 3 to 5 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. 

$$

fzus61 kbuf 201402
glflo 
expires:202609202100;;766995

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun sep 20 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 29.9 inch inverted trough draped from the ohio valley to new york 
state will drift southeastward and away from the lake this afternoon 
and tonight as a 30.4 inch high builds southeastward across ontario 
province. this high will then strengthen to 30.6 inches as it slowly 
drifts across quebec through thursday.


loz062-202100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt sun sep 20 2026

.rest of today...northeast winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...northeast winds 5 to 10 knots increasing to 15 to
20 knots. waves 1 to 2 feet building to 4 to 6 feet. 
.monday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.monday night...northeast winds 15 to 20 knots. waves 3 to
6 feet. 
.tuesday...northeast winds 15 to 25 knots becoming east. waves
4 to 7 feet. waves occasionally around 9 feet. 
.wednesday...east winds 15 to 20 knots. waves 3 to 6 feet. 
.thursday...east winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus61 kcle 201329
glfle 
expires:202609202015;;766104

open lake forecast for lake erie
national weather service cleveland oh
929 am edt sun sep 20 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 low pressure system 29.90 inches will move along a stalled 
boundary today, moving a strong cold front southeast through the 
area. the lake will then remain between cool high pressure 30.40 
inches to the north and a trough averaging 29.90 inches over the 
ohio valley through the middle of the week.


lez061-168-169-202015-
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-
929 am edt sun sep 20 2026

.rest of today...northeast winds 10 to 15 knots. a slight chance
of showers. waves 1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.monday night...northeast winds to 30 knots becoming east. waves
5 to 8 feet. waves occasionally around 10 feet. 
.tuesday...east winds 15 to 25 knots. a chance of showers. waves
5 to 8 feet. waves occasionally around 10 feet. 
.wednesday...east winds 15 to 20 knots. a chance of showers.
waves 3 to 6 feet. 
.thursday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 

$$

fzus61 kcle 201329
glfle 
expires:202609202015;;766102

open lake forecast for lake erie
national weather service cleveland oh
929 am edt sun sep 20 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 low pressure system 29.90 inches will move along a stalled 
boundary today, moving a strong cold front southeast through the 
area. the lake will then remain between cool high pressure 30.40 
inches to the north and a trough averaging 29.90 inches over the 
ohio valley through the middle of the week.


lez162-163-202015-
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-
929 am edt sun sep 20 2026

.rest of today...north winds 10 to 15 knots becoming northeast
15 to 20 knots. patchy fog late this morning. showers, then a
chance of showers late. waves 1 to 3 feet. 
.tonight...northeast winds 15 to 25 knots. a chance of showers in
the evening. waves 2 to 4 feet building to 3 to 6 feet. 
.monday...northeast winds 20 to 25 knots. waves 5 to 8 feet.
waves occasionally around 10 feet. 
.monday night...northeast winds 20 to 25 knots. a chance of
showers overnight. waves 5 to 8 feet. waves occasionally around
10 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers during the day, then showers likely tuesday night. waves
5 to 8 feet. waves occasionally around 10 feet. 
.wednesday...east winds 15 to 25 knots. showers likely during the
day, then a chance of showers wednesday night. waves 3 to 6 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. 

$$

fzus61 kcle 201329
glfle 
expires:202609202015;;766103

open lake forecast for lake erie
national weather service cleveland oh
929 am edt sun sep 20 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 low pressure system 29.90 inches will move along a stalled 
boundary today, moving a strong cold front southeast through the 
area. the lake will then remain between cool high pressure 30.40 
inches to the north and a trough averaging 29.90 inches over the 
ohio valley through the middle of the week.


lez164>167-202015-
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-
929 am edt sun sep 20 2026

.rest of today...northeast winds 10 to 15 knots increasing to
15 to 20 knots. patchy fog late this morning. a chance of
showers. waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...northeast winds 15 to 25 knots. a slight chance of
showers in the evening. waves 2 to 4 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.monday...east winds to 30 knots becoming northeast. waves 5 to
9 feet. waves occasionally around 11 feet. 
.monday night...northeast winds to 30 knots becoming east. waves
6 to 10 feet. waves occasionally around 13 feet. 
.tuesday...east winds to 30 knots. a chance of showers during the
day, then showers likely tuesday night. waves 6 to 10 feet. waves
occasionally around 13 feet. 
.wednesday...east winds 15 to 25 knots. showers likely during the
day, then a chance of showers wednesday night. 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. 

$$

fzus63 kdtx 201351
glflh 
expires:202609202200;;766701

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt sun sep 20 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 next week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz361-362-202200-
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-
951 am edt sun sep 20 2026

.rest of today...north winds 10 to 15 knots. waves 1 to 3 feet. 
.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots in the late evening and overnight. waves 2 to 4 feet
building to 4 to 6 feet in the late evening and overnight. waves
occasionally around 8 feet. 
.monday...northeast winds 15 to 20 knots decreasing to 10 to
15 knots early in the afternoon. waves 3 to 5 feet. 
.monday night...northeast winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. waves 3 to
5 feet. 
.tuesday...east winds 15 to 20 knots. waves 3 to 5 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots by midnight. waves 3 to 5 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
. waves 1 to 3 feet. 


$$

fzus63 kdtx 201351
glflh 
expires:202609202200;;766702

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt sun sep 20 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 next week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz363-462>464-202200-
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-
951 am edt sun sep 20 2026

.rest of today...north winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon. waves 1 to 3 feet building to
3 to 5 feet late in the afternoon. 
.tonight...northeast winds 15 to 20 knots increasing to 20 to
25 knots after midnight. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.monday...northeast winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday night...northeast winds 15 to 20 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.tuesday...northeast winds 15 to 20 knots with gusts to around
30 knots increasing to 20 to 25 knots with gusts to around
30 knots late in the afternoon...then becoming east 15 to
20 knots late in the evening. waves 4 to 6 feet. 
.wednesday...east winds 15 to 20 knots. waves 4 to 6 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. 


$$

fzus63 kdtx 201347
glfsc 
expires:202609202200;;766646

lake st clair forecast
national weather service detroit/pontiac mi
947 am edt sun sep 20 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 next week. this will lead to prolong
moderate northeast winds over the central great lakes.


lcz460-202200-
lake st clair-
947 am edt sun sep 20 2026

...small craft advisory in effect from 8 pm edt this evening
through wednesday evening...

.rest of today...northeast winds 10 to 15 knots. mostly cloudy.
patchy fog late in the morning. light showers likely late in the
morning...then a chance of light showers early in the afternoon.
waves 2 feet or less.
.tonight...northeast winds 15 to 20 knots increasing to 20 to 25
knots in the late evening and overnight. partly cloudy. waves 1 to 3
feet building to 2 to 4 feet in the late evening and overnight.
.monday...northeast winds 20 to 25 knots diminishing to 15 to 20
knots in the late morning and afternoon. partly sunny. waves 1 to 3
feet.
.monday night...northeast winds 20 to 25 knots increasing to 30
knots in the late evening and overnight. mostly cloudy. waves 2 to 4
feet.
.tuesday...northeast winds 20 to 25 knots diminishing to 15 to 20
knots with gusts to 30 knots in the afternoon...then increasing to
30 knots in the evening. partly sunny in the morning becoming mostly
cloudy. waves 2 to 4 feet building to 3 to 5 feet in the evening.
waves occasionally around 7 feet.
.wednesday...east winds to 30 knots. mostly cloudy with a chance of
showers. waves 2 to 4 feet.
.thursday...east winds 20 to 25 knots. partly cloudy. waves 1 to 3
feet.

$$

fzus63 kmkx 201351
glflm 
expires:202609202130;;766699

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 am cdt sun sep 20 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...

low pressure around 29.8 inches will move from central illinois 
into the ohio valley today into monday. meanwhile, high pressure 
around 30.4 inches over western ontario today will move eastward 
through monday, reaching quebec by monday night. the high will 
then largely remain in place into mid-week, while strengthening to
around 30.7 inches. gusty northeast winds are expected today into
tonight, becoming east and remaining gusty monday into wednesday.
a few gale force gusts may occur today into monday, mainly over 
southern portions of the lake. building waves are expected over 
western portions of the lake today into the middle of the week. 
lighter easterly winds should then linger for thursday into 
friday, as the high pressure system slowly moves farther east.


lmz080-669-671-673-675-777-779-870-872-874-876-878-202130-
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-
851 am cdt sun sep 20 2026

sheboygan wi to pentwater mi south...

.rest of today...northeast winds 15 to 25 kt increasing to 30 kt.
patchy fog. showers and slight chance of thunderstorms through
mid morning, then chance of showers this afternoon. waves 4 to
7 ft occasionally to 9 ft building to 10 to 14 ft occasionally to
18 ft. 
.tonight...northeast winds to 30 kt becoming east. waves 10 to
14 ft occasionally to 18 ft subsiding to 7 to 10 ft occasionally
to 13 ft. 
.monday...east winds to 30 kt becoming northeast. waves 8 to
11 ft occasionally to 14 ft. 
.monday night...northeast winds to 30 kt. waves 7 to 10 ft
occasionally to 13 ft. 
.tuesday...northeast winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft. 
.tuesday night...northeast winds to 30 kt diminishing to 15 to
25 kt. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northeast winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.thursday...east winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 201351
glflm 
expires:202609202130;;766698

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 am cdt sun sep 20 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...

low pressure around 29.8 inches will move from central illinois 
into the ohio valley today into monday. meanwhile, high pressure 
around 30.4 inches over western ontario today will move eastward 
through monday, reaching quebec by monday night. the high will 
then largely remain in place into mid-week, while strengthening to
around 30.7 inches. gusty northeast winds are expected today into
tonight, becoming east and remaining gusty monday into wednesday.
a few gale force gusts may occur today into monday, mainly over 
southern portions of the lake. building waves are expected over 
western portions of the lake today into the middle of the week. 
lighter easterly winds should then linger for thursday into 
friday, as the high pressure system slowly moves farther east.


lmz261-362-364-366-563-565-567-868-202130-
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-
851 am cdt sun sep 20 2026

sheboygan wi to pentwater mi north...

.rest of today...northeast winds 10 to 20 kt increasing to 30 kt.
waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.tonight...northeast winds to 30 kt becoming east 15 to 25 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.monday...east winds 15 to 25 kt becoming northeast to 30 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.monday night...northeast winds to 30 kt becoming east 15 to
25 kt. waves 4 to 7 ft occasionally to 9 ft. 
.tuesday...northeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft. 
.tuesday night...east winds to 30 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
3 to 5 ft. 
.thursday...east winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766965

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz266-202000-
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 sun sep 20 2026

.rest of today...northeast winds 20 to 30 knots diminishing to
15 to 25 knots in the afternoon, then backing north late. waves
3 to 5 feet occasionally to 7 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 2 to 4 feet. 
.monday...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766966

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt sun sep 20 2026

.rest of today...northeast winds 15 to 25 knots backing north
late. waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to
4 feet. 
.tonight...northeast winds 15 to 25 knots veering east after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 1 to 3 feet. 
.monday...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then becoming northeast 10 to 20 knots late.
waves subsiding to calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766961

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun sep 20 2026 /901 am cdt sun sep 20 2026/

.rest of today...northeast winds 20 to 30 knots becoming east
15 to 25 knots late. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.monday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.monday night...east winds 15 to 25 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
by mid afternoon. 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...east winds 10 to 20 knots. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766962

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz263-202000-
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 sun sep 20 2026

.rest of today...northeast winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.monday night...east winds 15 to 25 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
by mid 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 veering south. waves
calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766963

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt sun sep 20 2026

.rest of today...northeast winds 15 to 25 knots diminishing to
10 to 20 knots late. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.tonight...northeast winds 5 to 15 knots veering east after
midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. 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 veering south. waves
calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202609202000;;766964

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun sep 20 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...

today and monday, a 30.2 inch high over manitoba builds to 30.4 
inches as it moves over ontario. this high pressure center slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches wednesday as it progresses eastward. the 
high, still over southern quebec, weakens to 30.4 inches thursday. 
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.




lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt sun sep 20 2026

.rest of today...northeast winds 20 to 30 knots diminishing to
15 to 25 knots late. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...northeast winds 15 to 25 knots veering east after
midnight. waves subsiding to 2 to 4 feet. 
.monday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.monday night...east winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid 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...east winds 10 to 20 knots veering south. waves calm
to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 

$$