fzus61 kbuf 122002
glflo 
expires:202609130300;;343039

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat sep 12 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 30.0 inches continues 
to exit eastward and allows a wavy warm front to sweep northeastward 
across the lake this evening. a cold front then sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. a cold 
front should sweep eastward across the lake on wednesday and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest through thursday.


loz063>065-130300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat sep 12 2026

.tonight...south winds 15 to 20 knots becoming southwest. a
chance of showers and thunderstorms early, then showers likely
with a chance of thunderstorms. a chance of showers late. waves
1 to 3 feet building to 2 to 4 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. a chance
of showers early. a chance of showers late. waves 1 to 3 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest. a
chance of showers. waves 2 to 4 feet building to 3 to 5 feet. 
.monday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.tuesday...south winds 15 to 25 knots. a chance of showers
tuesday night. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 15 to 20 knots becoming east and
diminishing to 10 knots or less. a chance of showers. waves 1 to
3 feet subsiding to 1 foot or less. 
.thursday...southeast winds 5 to 15 knots becoming north 15 to
20 knots. showers likely. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 122002
glflo 
expires:202609130300;;343038

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat sep 12 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 30.0 inches continues 
to exit eastward and allows a wavy warm front to sweep northeastward 
across the lake this evening. a cold front then sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. a cold 
front should sweep eastward across the lake on wednesday and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest through thursday.


loz062-130300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sat sep 12 2026

.tonight...southeast winds 5 to 15 knots becoming southwest.
waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
showers in the evening. waves 1 to 3 feet building to 3 to
5 feet, then subsiding to 2 to 4 feet. 
.monday...north winds 15 to 20 knots becoming west and
diminishing to less than 10 knots in the afternoon. waves 2 to
4 feet subsiding to 1 foot or less. 
.monday night...west winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday...south winds 5 to 15 knots becoming southwest. a chance
of showers tuesday night. waves 2 feet or less. 
.wednesday...west winds 10 knots or less becoming east. a chance
of showers. waves 1 foot or less. 
.thursday...east winds 5 to 15 knots becoming north. showers
likely during the day, then a chance of showers thursday night.
waves 2 feet or less. 

$$

fzus61 kcle 121949
glfle 
expires:202609130215;;342551

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt sat sep 12 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...
pressure holds around 29.90 inches before a cold front tracks 
across lake erie sunday, followed by high pressure 30.30 inches 
for monday. pressure falls to 30.20 inches tuesday night as a warm
front sets up over lake erie for midweek.



lez164>167-130215-
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-
349 pm edt sat sep 12 2026

.tonight...southwest winds 10 to 15 knots. a slight chance of
showers and thunderstorms early. a slight chance of showers late.
waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...west winds 5 to 15 knots. a slight chance of showers
and thunderstorms in the afternoon. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north.
waves 1 to 3 feet building to 3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming northeast 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday night...east winds 10 knots or less becoming southeast
and increasing to 15 to 20 knots overnight. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely with a chance of thunderstorms tuesday
night. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...west winds 5 to 10 knots becoming southeast. a
chance of showers. waves 2 feet or less. 
.thursday...southwest winds 10 to 15 knots becoming northeast
15 to 20 knots. showers likely during the day, then a chance of
showers thursday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121949
glfle 
expires:202609130215;;342552

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt sat sep 12 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...
pressure holds around 29.90 inches before a cold front tracks 
across lake erie sunday, followed by high pressure 30.30 inches 
for monday. pressure falls to 30.20 inches tuesday night as a warm
front sets up over lake erie for midweek.



lez061-168-169-130215-
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-
349 pm edt sat sep 12 2026

.tonight...southwest winds 10 to 15 knots. a chance of showers
with a slight chance of thunderstorms early, then a slight chance
of showers and thunderstorms late this evening. waves 1 to
3 feet. 
.sunday...west winds 5 to 15 knots. a slight chance of showers
and thunderstorms late. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north. a
chance of showers in the evening. waves 2 to 3 feet building to
3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming northeast and
diminishing to less than 10 knots in the afternoon. waves 3 to
5 feet subsiding to 2 feet or less. 
.monday night...east winds 10 knots or less becoming southeast
10 to 15 knots. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...southwest winds 10 knots or less becoming southeast.
a chance of showers. waves 2 feet or less. 
.thursday...southwest winds 5 to 15 knots becoming northeast. a
chance of showers. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121949
glfle 
expires:202609130215;;342550

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt sat sep 12 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...
pressure holds around 29.90 inches before a cold front tracks 
across lake erie sunday, followed by high pressure 30.30 inches 
for monday. pressure falls to 30.20 inches tuesday night as a warm
front sets up over lake erie for midweek.



lez162-163-130215-
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-
349 pm edt sat sep 12 2026

.tonight...south winds around 10 knots becoming west. waves 1 to
2 feet. 
.sunday...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 1 to 3 feet building to 2 to 4 feet. 
.monday...north winds 5 to 15 knots becoming east less than
10 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.monday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms tuesday
night. waves 1 to 3 feet subsiding to 1 foot or less. 
.wednesday...north winds 5 to 10 knots becoming east. a chance of
showers during the day, then showers likely wednesday night.
waves 1 foot or less. 
.thursday...southwest winds 10 to 15 knots becoming northeast
15 to 20 knots. showers likely during the day, then a chance of
showers thursday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121942
glfsc 
expires:202609130345;;342364

lake st clair forecast
national weather service detroit/pontiac mi
342 pm edt sat sep 12 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...low pressure, 29.30 inches, lifting over northern
ontario then drags a cold front across the central great lakes
late saturday into sunday.


lcz460-130345-
lake st clair-
342 pm edt sat sep 12 2026

.tonight...southwest winds 10 to 15 knots becoming west 5 to 10
knots after midnight. partly cloudy. waves 2 feet or less.
.sunday...north winds 5 to 10 knots becoming northwest 15 to 20
knots late in the afternoon. mostly sunny. waves 2 feet or less.
.sunday night...northwest winds 20 to 25 knots becoming north 15 to
20 knots after midnight. mostly cloudy early in the evening then
clearing. waves 1 to 3 feet.
.monday...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and early afternoon...then becoming light and
variable early in the afternoon. sunny. waves 2 feet or less.
.monday night...southeast winds 5 to 10 knots becoming south 15 to
20 knots. partly cloudy. waves 2 feet or less.
.tuesday...south winds 20 to 25 knots becoming southwest 10 to 15
knots. partly cloudy. a chance of light showers. showers likely in
the evening. waves 1 to 3 feet.
.wednesday...northeast winds 5 to 10 knots. mostly cloudy. showers
likely. waves 2 feet or less.
.thursday...north winds 10 to 15 knots. mostly cloudy. showers
likely. waves 2 feet or less.

$$

fzus63 kdtx 121941
glflh 
expires:202609130345;;342361

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 pm edt sat sep 12 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...low pressure, 29.30 inches, lifting over northern
ontario then drags a cold front across the central great lakes
late saturday into sunday.


lhz361>363-130345-
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-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
341 pm edt sat sep 12 2026

.tonight...south winds 10 to 15 knots veering to the southwest
late in the evening...then veering to the southwest 10 to
15 knots after midnight decreasing to 5 to 10 knots early in the
morning. a chance of showers in the evening. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.sunday...northwest winds 5 to 10 knots becoming west 15 to
20 knots with gusts to around 30 knots. waves 1 to 3 feet
building to 4 to 6 feet late in the afternoon. waves occasionally
around 8 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots early in the morning
becoming light and variable. waves 3 to 5 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.monday night...southeast winds 5 to 10 knots increasing to 15 to
20 knots with gusts to around 30 knots by midnight...then
becoming south 20 to 25 knots with gusts to 35 knot gales after
midnight. showers after midnight. waves 1 to 3 feet building to
6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...south winds to 30 knots with gusts to 40 knot gales
decreasing to 20 to 25 knots with gusts to 40 knot gales late in
the morning...then becoming southwest 10 to 15 knots late in the
afternoon. showers in the morning. rain showers likely late in
the morning. waves 8 to 12 feet subsiding to 2 to 4 feet late in
the evening. waves occasionally around 15 feet. 
.wednesday...north winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots by midnight. a chance of showers by midnight. waves
2 feet or less. 
.thursday...northeast winds 5 to 10 knots. a chance of showers
until afternoon. waves 2 feet or less. 


$$

fzus63 kdtx 121941
glflh 
expires:202609130345;;342362

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 pm edt sat sep 12 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...low pressure, 29.30 inches, lifting over northern
ontario then drags a cold front across the central great lakes
late saturday into sunday.


lhz462>464-130345-
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-
341 pm edt sat sep 12 2026

.tonight...south winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 10 knots backing to the northwest
early in the afternoon...then becoming west 10 to 15 knots late
in the afternoon. a chance of showers in the afternoon. waves
1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots becoming light and
variable. waves 3 to 5 feet subsiding to 1 to 3 feet early in the
afternoon. 
.monday night...light and variable winds becoming southeast 10 to
15 knots by midnight...then becoming south 15 to 20 knots with
gusts to around 30 knots after midnight. waves 1 to 3 feet
building to 4 to 6 feet after midnight. waves occasionally around
8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
becoming southwest 10 to 15 knots late in the afternoon. showers
likely...then a chance of showers late in the afternoon. waves
5 to 7 feet subsiding to 1 to 3 feet late in the evening. waves
occasionally around 10 feet. 
.wednesday...north winds 5 to 10 knots veering to the northeast
by midnight. a chance of showers early in the evening. rain
showers likely by midnight. waves 2 feet or less. 
.thursday...east winds 5 to 10 knots becoming north 10 to
15 knots. showers likely until afternoon. waves 1 to 3 feet. 


$$

fzus63 kmkx 121950
glflm 
expires:202609130315;;342562

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt sat sep 12 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...

a cold front will move across lake michigan late this afternoon
with modest southwest winds shifting west northwest. modest
northwest winds will then prevail tonight and sunday until high 
pressure around 30.3 inches moves across the lake late sunday
night into monday morning. winds will increase and veer south- 
southwest monday night into tuesday as low pressure around 29.4 
inches develops over manitoba. gales appear likely during this 
time frame. periods of showers and thunderstorms will accompany 
the developing low from as early as monday evening into tuesday. 
winds will trend northerly and weaken behind a cold front tuesday 
night into wednesday.


lmz261-362-364-366-563-565-567-868-130315-
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-
250 pm cdt sat sep 12 2026

sheboygan wi to pentwater mi north...

.tonight...northwest winds 10 to 20 kt becoming north 15 to
25 kt, then becoming northwest 10 to 20 kt late. waves 2 to 4 ft.
.sunday...northwest winds 10 to 20 kt increasing to 30 kt. waves
3 to 5 ft. 
.sunday night...northwest winds to 30 kt becoming north 10 to
15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...northeast winds 10 to 15 kt veering to south 15 to
25 kt in the afternoon. waves 1 to 3 ft building to 3 to 5 ft. 
.monday night...south gales to 40 kt. chance of showers in the
evening, then showers overnight. waves 7 to 10 ft occasionally to
13 ft building to 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 40 kt diminishing to 30 kt in the
afternoon. showers in the morning, then chance of showers in the
afternoon. waves 10 to 14 ft occasionally to 18 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.tuesday night...northwest winds 15 to 25 kt becoming north 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. chance of showers. waves 1 to 3 ft.  

$$

fzus63 kmkx 121950
glflm 
expires:202609130315;;342563

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt sat sep 12 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...

a cold front will move across lake michigan late this afternoon
with modest southwest winds shifting west northwest. modest
northwest winds will then prevail tonight and sunday until high 
pressure around 30.3 inches moves across the lake late sunday
night into monday morning. winds will increase and veer south- 
southwest monday night into tuesday as low pressure around 29.4 
inches develops over manitoba. gales appear likely during this 
time frame. periods of showers and thunderstorms will accompany 
the developing low from as early as monday evening into tuesday. 
winds will trend northerly and weaken behind a cold front tuesday 
night into wednesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130315-
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-
250 pm cdt sat sep 12 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.sunday...north winds 10 to 20 kt becoming northwest 15 to 25 kt.
slight chance of showers in the afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...northwest winds 10 to 20 kt becoming northeast
10 to 15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...east winds 10 to 20 kt becoming southeast 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.monday night...southeast gales to 40 kt becoming south. chance
of showers overnight. waves 6 to 9 ft occasionally to 12 ft
building to 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt diminishing to 30 kt. showers
likely in the morning, then chance of showers in the afternoon.
waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.tuesday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers and thunderstorms. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 2 to 4 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. waves 3 to 5 ft.  

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342958

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sat sep 12 2026

.late this afternoon...west winds to 30 knots with a few gale
force gusts to 35 knots possible. waves 3 to 6 feet occasionally
to 8 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds to 30 knots with a few gale force gusts to
35 knots possible becoming northwest 20 to 30 knots after
midnight. waves 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a slight chance of showers through early afternoon.
waves subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.monday...south winds 10 to 20 knots becoming southeast 20 to
30 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tuesday...southwest gales to 35 knots becoming west gales to
40 knots by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.tuesday night...northwest gales to 35 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342959

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz266-130800-
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 pm edt sat sep 12 2026

.late this afternoon...west winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight, then diminishing to 15 to 25 knots late. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 7 to 10 feet occasionally to 13 feet. 
.tuesday...southwest gales to 35 knots becoming west gales to
40 knots by mid afternoon. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...northwest gales to 35 knots becoming north 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots veering east. waves
subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342960

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sat sep 12 2026

.late this afternoon...west winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight, then diminishing to 15 to 25 knots late. waves building
to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. a chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots backing southeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 20 to 30 knots increasing to gales to
40 knots after midnight. showers. waves building to 6 to 9 feet
occasionally to 11 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...west winds 20 to 30 knots becoming north 10 to
20 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342955

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat sep 12 2026 /301 pm cdt sat sep 12 2026/

.late this afternoon...west winds 15 to 25 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 1 to 3 feet. 
.sunday...west winds 15 to 25 knots becoming northwest 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. showers likely by mid afternoon. waves
calm to 2 feet. 
.monday night...southeast gales to 35 knots veering southwest
after midnight. showers through midnight. waves building to 4 to
7 feet occasionally to 9 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342956

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz263-130800-
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 pm edt sat sep 12 2026

.late this afternoon...west winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then backing west late. waves
subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 4 to 8 feet occasionally to
10 feet. 
.tuesday...west gales to 40 knots. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202609130800;;342957

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 12 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 cold front and 29.7 inch trough continue to shift east of the lake 
this evening. 30.0 inch ridging builds back in from the northern 
plains on sunday and strengthens to 30.2 inches on monday. a low 
averaging 29.4 inches crosses northern ontario on tuesday, with a 
strong 30.4 inch high building across lake superior on wednesday.




lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sat sep 12 2026

.late this afternoon...west winds to 30 knots with a few gale
force gusts to 35 knots possible. waves 4 to 7 feet occasionally
to 9 feet subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots becoming northwest 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon, then veering northwest late. a slight chance of
showers through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 1 to 3 feet. 
.monday night...south gales to 35 knots. showers. waves building
to 6 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots. waves subsiding to 4 to 7 feet
occasionally to 9 feet, then building to 6 to 9 feet occasionally
to 11 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$