fzus61 kbuf 052002
glflo 
expires:202609060300;;959426

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat sep 5 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...
a large high pressure ridge averaging 30.1 inches will gradually 
build from the upper great lakes tonight, southeast across the lower 
great lakes region through tuesday. the ridge will shift southeast 
on wednesday, allowing a warm front to sweep northeastward across 
the lake, followed by a cold front crossing the lake later wednesday 
night into thursday.


loz062-060300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sat sep 5 2026

.tonight...northwest winds 10 knots or less becoming northeast.
waves 2 feet or less. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.sunday night...east winds less than 10 knots. waves 1 foot or
less. 
.monday...west winds less than 10 knots becoming southwest. waves
1 foot or less. 
.monday night...southwest winds less than 10 knots becoming west.
waves 1 foot or less. 
.tuesday...light and variable winds becoming south 5 to 10 knots.
waves 2 feet or less. 
.wednesday...southwest winds 15 to 25 knots becoming west. a
chance of showers. waves 2 to 4 feet building to 4 to 7 feet,
then subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.thursday...west winds 15 to 20 knots becoming northwest. waves
3 to 5 feet subsiding to 2 to 3 feet. 

$$

fzus61 kbuf 052002
glflo 
expires:202609060300;;959427

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat sep 5 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...
a large high pressure ridge averaging 30.1 inches will gradually 
build from the upper great lakes tonight, southeast across the lower 
great lakes region through tuesday. the ridge will shift southeast 
on wednesday, allowing a warm front to sweep northeastward across 
the lake, followed by a cold front crossing the lake later wednesday 
night into thursday.


loz063>065-060300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat sep 5 2026

.tonight...northwest winds 5 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...north winds 10 knots or less becoming northwest.
waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.monday night...west winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...west winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.wednesday...south winds 15 to 25 knots becoming west to
30 knots. showers likely. waves 2 to 4 feet building to 3 to
6 feet. 
.thursday...west winds 15 to 25 knots becoming northwest. waves
3 to 6 feet building to 4 to 7 feet, then subsiding to 2 to
4 feet. waves occasionally around 9 feet. 

$$

fzus61 kcle 052056
glfle 
expires:202609060215;;962535

open lake forecast for lake erie
national weather service cleveland oh
456 pm edt sat sep 5 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.20 inches north of lake erie will slowly build
south over the lake through early next week.


lez061-168-169-060215-
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-
456 pm edt sat sep 5 2026

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

$$

fzus61 kcle 052056
glfle 
expires:202609060215;;962534

open lake forecast for lake erie
national weather service cleveland oh
456 pm edt sat sep 5 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.20 inches north of lake erie will slowly build
south over the lake through early next week.


lez164>167-060215-
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-
456 pm edt sat sep 5 2026

.tonight...northeast winds 5 to 15 knots. a slight chance of
showers after midnight. a chance of showers late. waves 1 to
2 feet. 
.sunday...northeast winds 10 to 15 knots. a chance of showers
early, then a slight chance of showers late in the morning. waves
1 to 3 feet. 
.sunday night...northeast winds 5 to 15 knots becoming east.
waves 1 to 3 feet. 
.monday...east winds 5 to 15 knots becoming northeast. waves 1 to
2 feet. 
.monday night...east winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.tuesday...southeast winds less than 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west. waves
2 to 4 feet building to 3 to 6 feet. 
.thursday...west winds 15 to 20 knots becoming north 10 to
15 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 052056
glfle 
expires:202609060215;;962533

open lake forecast for lake erie
national weather service cleveland oh
456 pm edt sat sep 5 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.20 inches north of lake erie will slowly build
south over the lake through early next week.


lez162-163-060215-
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-
456 pm edt sat sep 5 2026

.tonight...northeast winds 10 to 15 knots. a slight chance of
showers late. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots. a slight chance of
showers in the morning. waves 1 to 2 feet. 
.sunday night...northeast winds 10 to 15 knots. waves 1 to
2 feet. 
.monday...east winds around 10 knots. waves 1 to 2 feet. 
.monday night...east winds 5 to 10 knots becoming southeast.
waves 1 to 2 feet. 
.tuesday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 2 feet or less. 
.wednesday...southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. waves 1 to 3 feet. 
.thursday...west winds 10 to 15 knots becoming north. waves 1 to
2 feet. 

$$

fzus63 kdtx 052005
glfsc 
expires:202609060415;;959744

lake st clair forecast
national weather service detroit/pontiac mi
405 pm edt sat sep 5 2026

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

.synopsis...favorable marine conditions are forecast through the
weekend as high pressure builds south from central ontario, 
eventually settling over lake huron. a low pressure system 
arrives tuesday night into wednesday with associated warm/cold 
fronts leading to rising thunderstorm chances.


lcz460-060415-
lake st clair-
405 pm edt sat sep 5 2026

.tonight...northeast winds 15 to 20 knots diminishing to 10 to 15
knots after midnight. clear. waves 1 to 3 feet.
.sunday...northeast winds 10 to 15 knots diminishing to 5 to 10
knots in the late morning and afternoon. mostly sunny. waves 2 feet
or less.
.sunday night...northeast winds 10 to 15 knots diminishing to 5 to
10 knots in the late evening and overnight. partly cloudy. waves 2
feet or less.
.monday...east winds 5 to 10 knots. mostly sunny. waves 2 feet or
less.
.monday night...east winds 5 to 10 knots. mostly clear. waves 2 feet
or less.
.tuesday...southeast winds 5 to 10 knots becoming south 10 to 15
knots in the afternoon and evening. mostly sunny in the morning
becoming partly cloudy. waves 2 feet or less.
.wednesday...west winds 20 to 25 knots with gusts to 30 knots.
partly cloudy. waves 1 to 3 feet. a small craft advisory may be
needed.
.thursday...north winds 15 to 20 knots. partly cloudy. waves 2 feet
or less.

$$

fzus63 kdtx 052005
glflh 
expires:202609060415;;959734

open lake forecast for lake huron
national weather service detroit/pontiac mi
405 pm edt sat sep 5 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...favorable marine conditions are forecast through the
weekend as high pressure builds south from central ontario, 
eventually settling over lake huron. a low pressure system 
arrives tuesday night into wednesday with associated warm/cold 
fronts leading to rising thunderstorm chances.


lhz361-362-060415-
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-
405 pm edt sat sep 5 2026

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


$$

fzus63 kdtx 052005
glflh 
expires:202609060415;;959735

open lake forecast for lake huron
national weather service detroit/pontiac mi
405 pm edt sat sep 5 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...favorable marine conditions are forecast through the
weekend as high pressure builds south from central ontario, 
eventually settling over lake huron. a low pressure system 
arrives tuesday night into wednesday with associated warm/cold 
fronts leading to rising thunderstorm chances.


lhz363-462-060415-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
405 pm edt sat sep 5 2026

.tonight...north winds 5 to 10 knots. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.monday...light and variable winds. waves 2 feet or less. 
.monday night...light and variable winds becoming southeast 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.tuesday...south winds 5 to 10 knots increasing to 15 to
20 knots. a chance of thunderstorms late in the evening. waves
2 feet or less building to 3 to 5 feet late in the afternoon. 
.wednesday...southwest winds 15 to 20 knots increasing to 20 to
25 knots in the late morning and early afternoon...then becoming
west 15 to 20 knots . gusts to 35 knot gales. showers likely
early in the morning. a chance of showers in the late morning and
early afternoon. waves 4 to 6 feet. 
.thursday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots . waves 2 to 4 feet. waves occasionally around 8 feet. 


$$

fzus63 kdtx 052005
glflh 
expires:202609060415;;959736

open lake forecast for lake huron
national weather service detroit/pontiac mi
405 pm edt sat sep 5 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...favorable marine conditions are forecast through the
weekend as high pressure builds south from central ontario, 
eventually settling over lake huron. a low pressure system 
arrives tuesday night into wednesday with associated warm/cold 
fronts leading to rising thunderstorm chances.


lhz463-464-060415-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
405 pm edt sat sep 5 2026

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


$$

fzus63 kmkx 051949
glflm 
expires:202609060330;;958655

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt sat sep 5 2026

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

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

.synopsis...

light to modest east northeast winds are expected into tonight. 
high pressure around 30.1 inches will build into the northern 
great lakes tonight and sunday, shifting to the lower great lakes
for monday. light and variable winds are forecast for sunday and 
monday. 

increasing south to southwest winds are possible tuesday into 
wednesday, shifting west to northwest wednesday night into 
thursday, as a cold front moves toward and through the region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-060330-
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-
249 pm cdt sat sep 5 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 10 to 20 kt veering to east 10 to 15 kt.
waves 2 to 4 ft. 
.sunday...east winds 10 to 15 kt backing to north. waves 1 to
3 ft subsiding to 1 to 2 ft. 
.sunday night...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt. waves 1 to 2 ft. 
.monday night...southeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft. 
.tuesday night...south winds to 30 kt becoming southwest. chance
of showers. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...southwest winds to 30 kt becoming west. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.thursday...northwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 051949
glflm 
expires:202609060330;;958654

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt sat sep 5 2026

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

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

.synopsis...

light to modest east northeast winds are expected into tonight. 
high pressure around 30.1 inches will build into the northern 
great lakes tonight and sunday, shifting to the lower great lakes
for monday. light and variable winds are forecast for sunday and 
monday. 

increasing south to southwest winds are possible tuesday into 
wednesday, shifting west to northwest wednesday night into 
thursday, as a cold front moves toward and through the region.


lmz261-362-364-366-563-565-567-868-060330-
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-
249 pm cdt sat sep 5 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 10 to 20 kt becoming east 10 to 15 kt
after midnight, then diminishing to 5 to 10 kt late. waves 1 to
3 ft. 
.sunday...southeast winds 5 to 10 kt becoming northeast. patchy
fog in the morning. waves 1 to 2 ft. 
.sunday night...northeast winds 10 to 15 kt veering to south.
waves 1 to 2 ft. 
.monday...south winds 5 to 10 kt increasing to 10 to 15 kt. waves
1 to 2 ft. 
.monday night...southeast winds 5 to 10 kt becoming south 10 to
20 kt overnight. waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...south winds 15 to 25 kt increasing to 30 kt. chance of
showers. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.tuesday night...south gales to 35 kt becoming southwest. showers
with a chance of thunderstorms. waves 5 to 8 ft occasionally to
10 ft. 
.wednesday...southwest gales to 35 kt becoming west gales to
40 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.thursday...northwest winds 15 to 25 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959209

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz265-060800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt sat sep 5 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots late. waves calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. showers likely after midnight.
waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. showers through early afternoon. a chance of
thunderstorms. a chance of showers by mid afternoon. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.tuesday night...south gales to 35 knots veering southwest after
midnight. a chance of showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots becoming southwest
10 to 20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959207

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz263-060800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 pm edt sat sep 5 2026

.late this afternoon...northeast 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. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots late. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight, then becoming south 10 to 20 knots late. waves calm to
2 feet. 
.monday...south winds 10 to 20 knots backing east by mid
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.monday night...southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. a chance of showers through
midnight, then showers after midnight. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. showers through early afternoon. a chance of
thunderstorms. a chance of showers by mid afternoon. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...southwest gales to 35 knots becoming west gales
to 40 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...west gales to 45 knots becoming northwest gales to
40 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots backing southwest.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959210

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz266-060800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 pm edt sat sep 5 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds 5 to 15 knots veering southeast late.
waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. a chance of showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots. showers and a chance of
thunderstorms. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday night...south gales to 35 knots veering southwest after
midnight. a chance of showers. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.wednesday...west gales to 45 knots veering northwest. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 15 to 25 knots becoming southwest
10 to 20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959211

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz267-060800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt sat sep 5 2026

.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...north winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight, then veering east late. waves calm to
2 feet. 
.sunday...southeast winds 5 to 15 knots backing northeast late.
waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots. a chance of
showers after midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots. showers. waves building to
3 to 6 feet occasionally to 8 feet. 
.tuesday night...south winds 20 to 30 knots becoming southwest
gales to 35 knots after midnight. showers likely through
midnight. a chance of thunderstorms. a chance of showers after
midnight. waves 3 to 6 feet occasionally to 8 feet. 
.wednesday...west gales to 40 knots veering northwest. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.thursday...northwest winds 15 to 25 knots becoming west 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959208

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz264-060800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt sat sep 5 2026

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

$$

fzus63 kmqt 052000
glfls 
expires:202609060800;;959206

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat sep 5 2026

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

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

.synopsis...

high pressure ridging of 30.1 inches over lake superior this 
afternoon remains through sunday night. the ridge briefly builds 
further to 30.2 inches on monday as a 30.4 inch high passes eastward 
over far northern ontario. meanwhile, a 29.6 inch low develops off 
the northern rockies. the low then tracks northeast to eastern 
hudson bay, deepening to 29.2 inches by wednesday afternoon. this 
sends a 29.7 inch trough over lake superior tuesday night and 
wednesday. weak ridging of 29.9 inches returns to lake superior by 
the end of thursday.




lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sat sep 5 2026 /300 pm cdt sat sep 5 2026/

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

$$