fzus61 kbuf 151402
glflo 
expires:202510152100;;180138

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed oct 15 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...an expansive 30.3 inch high will build from the upper 
great lakes today into quebec and the lower great lakes thursday 
through friday. the large surface high will push off the east coast 
on saturday as a large 29.2 inch surface low tracks across ontario, 
pushing its associated warm front across the lake saturday, followed 
by an associated cold front crossing the lake later sunday into 
sunday night.


loz063>065-152100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed oct 15 2025

.this afternoon...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tonight...north winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.thursday...north winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...north winds 15 to 20 knots becoming northeast
10 to 15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday...northeast winds 10 knots or less becoming south. a
chance of showers friday night. waves 1 to 3 feet subsiding to
1 foot or less. 
.saturday...south winds 5 to 10 knots increasing to 15 to
25 knots. a chance of showers. waves 1 to 3 feet building to 3 to
5 feet. 
.sunday...south winds 15 to 25 knots becoming southwest to
30 knots. showers. waves 3 to 5 feet building to 5 to 8 feet.
waves occasionally around 10 feet. 

$$

fzus61 kbuf 151402
glflo 
expires:202510152100;;180137

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed oct 15 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...an expansive 30.3 inch high will build from the upper 
great lakes today into quebec and the lower great lakes thursday 
through friday. the large surface high will push off the east coast 
on saturday as a large 29.2 inch surface low tracks across ontario, 
pushing its associated warm front across the lake saturday, followed 
by an associated cold front crossing the lake later sunday into 
sunday night.


loz062-152100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt wed oct 15 2025

.this afternoon...north winds 10 to 15 knots becoming northwest.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet building to 2 to 4 feet. 
.thursday...north winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.friday...northeast winds 5 to 10 knots becoming south. a chance
of showers friday night. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots. a chance of showers during
the day, then showers likely saturday night. waves 2 feet or
less. 
.sunday...south winds 10 to 15 knots becoming west and increasing
to 15 to 25 knots. showers. waves 1 to 3 feet building to 3 to
6 feet. 

$$

fzus61 kcle 151327
glfle 
expires:202510152030;;179152

open lake forecast for lake erie
national weather service cleveland oh
927 am edt wed oct 15 2025

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 will move from the northern great lakes
this afternoon to the southern great lakes thursday night. this 
high will move east of the area friday and allow a warm front to 
cross the lake on friday night into saturday. a strong cold front 
will cross the lake on sunday morning.


lez162-163-152030-
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-
927 am edt wed oct 15 2025

.rest of today...north winds 5 to 15 knots. a slight chance of
showers late this morning. waves 1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.thursday...northeast winds 10 knots or less. waves 2 feet or
less. 
.thursday night...east winds 10 knots or less becoming south.
waves 1 foot or less. 
.friday...south winds 5 to 15 knots. a chance of showers friday
night. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers during the day, then showers
saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 15 to 25 knots becoming west. showers
likely during the day, then a chance of showers sunday night.
waves 1 to 3 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 

$$

fzus61 kcle 151327
glfle 
expires:202510152030;;179153

open lake forecast for lake erie
national weather service cleveland oh
927 am edt wed oct 15 2025

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 will move from the northern great lakes
this afternoon to the southern great lakes thursday night. this 
high will move east of the area friday and allow a warm front to 
cross the lake on friday night into saturday. a strong cold front 
will cross the lake on sunday morning.


lez164>168-152030-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
927 am edt wed oct 15 2025

.rest of today...north winds 10 to 15 knots. a slight chance of
showers late this morning. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.tonight...north winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...northeast winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.thursday night...northeast winds less than 10 knots becoming
south. waves 1 foot or less. 
.friday...south winds 5 to 15 knots. a chance of showers friday
night. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming southwest. a
chance of showers during the day, then showers saturday night.
waves 1 to 3 feet building to 3 to 5 feet. 
.sunday...southwest winds 15 to 25 knots becoming west to
30 knots. showers during the day, then showers likely sunday
night. waves 3 to 6 feet building to 5 to 9 feet. waves
occasionally around 11 feet. 

$$

fzus61 kcle 151327
glfle 
expires:202510152030;;179154

open lake forecast for lake erie
national weather service cleveland oh
927 am edt wed oct 15 2025

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 will move from the northern great lakes
this afternoon to the southern great lakes thursday night. this 
high will move east of the area friday and allow a warm front to 
cross the lake on friday night into saturday. a strong cold front 
will cross the lake on sunday morning.


lez061-169-152030-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
927 am edt wed oct 15 2025

.rest of today...north winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...north winds 10 to 15 knots. waves 1 to 3 feet. 
.thursday...north winds 5 to 10 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.thursday night...north winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...south winds 10 knots or less increasing to 10 to
15 knots. a chance of showers friday night. waves 2 feet or less.
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots. showers likely saturday night. waves 1 to 3 feet
building to 2 to 4 feet. 
.sunday...southwest winds 15 to 25 knots becoming west. showers.
waves 3 to 5 feet building to 5 to 8 feet. waves occasionally
around 10 feet. 

$$

fzus63 kdtx 151343
glfsc 
expires:202510152145;;179487

lake st clair forecast
national weather service detroit/pontiac mi
943 am edt wed oct 15 2025

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...northeast flow backs to northwest by the late
afternoon and evening hours in the wake of a cold front.
expansive high pressure, 30.30 inches, will then build into the
great lakes through and will last through thursday.


lcz460-152145-
lake st clair-
943 am edt wed oct 15 2025

.rest of today...north winds 5 to 10 knots increasing to 10 to 15
knots late in the afternoon. partly sunny. waves 2 feet or less.
.tonight...north winds 10 to 15 knots diminishing to 5 to 10 knots
after midnight. clear. waves 2 feet or less.
.thursday...north winds 5 to 10 knots until late afternoon becoming
light and variable. sunny. waves 2 feet or less.
.thursday night...light and variable winds. clear. waves nearly
calm.
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots in
the evening. mostly sunny becoming partly sunny in the afternoon
becoming mostly cloudy. a chance of light showers in the evening.
waves 2 feet or less.
.saturday...south winds 15 to 20 knots. light showers. waves 1 to 3
feet.
.sunday...west winds 20 to 25 knots with gusts to 30 knots. light
showers. waves 1 to 3 feet. a small craft advisory may be needed.

$$

fzus63 kdtx 151342
glflh 
expires:202510152145;;179484

open lake forecast for lake huron
national weather service detroit/pontiac mi
942 am edt wed oct 15 2025

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...northeast flow backs to northwest by the late
afternoon and evening hours in the wake of a cold front.
expansive high pressure, 30.30 inches, will then build into the
great lakes through and will last through thursday.


lhz462>464-152145-
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-
942 am edt wed oct 15 2025

.rest of today...north winds 10 to 15 knots. waves 2 to 4 feet. 
.tonight...north winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight. 
.thursday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.thursday night...north winds 5 to 10 knots early in the evening
becoming light and variable...then becoming east 5 to 10 knots
after midnight. waves 2 feet or less. 
.friday...south winds 5 to 10 knots increasing to 15 to 20 knots.
a chance of showers late in the morning. rain showers likely late
in the afternoon. waves 1 to 3 feet building to 3 to 5 feet late
in the afternoon. 
.saturday...south winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the late morning and
early afternoon...then decreasing to 15 to 20 knots until early
morning. a chance of showers early in the morning...then showers
until early morning. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...west winds 15 to 20 knots with gusts to around 30 knots
increasing to 20 to 25 knots with gusts to around 30 knots early
in the evening...then decreasing to 15 to 20 knots in the late
evening and early morning. showers early in the morning...then
showers likely. waves 4 to 6 feet building to 6 to 9 feet until
early morning. waves occasionally around 12 feet. 


$$

fzus63 kdtx 151342
glflh 
expires:202510152145;;179483

open lake forecast for lake huron
national weather service detroit/pontiac mi
942 am edt wed oct 15 2025

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...northeast flow backs to northwest by the late
afternoon and evening hours in the wake of a cold front.
expansive high pressure, 30.30 inches, will then build into the
great lakes through and will last through thursday.


lhz362-363-152145-
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-
942 am edt wed oct 15 2025

.rest of today...north winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the afternoon. 
.tonight...north winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. waves 1 to 3 feet. 
.thursday...north winds 5 to 10 knots until late afternoon
becoming light and variable. waves 1 to 3 feet. 
.thursday night...light and variable winds becoming south 5 to
10 knots after midnight. a chance of showers after midnight.
waves 2 feet or less. 
.friday...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers...then showers likely late in the
afternoon. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. a chance of showers early
in the morning...then showers likely in the late morning and
early afternoon. rain showers until early morning. waves 6 to
9 feet. waves occasionally around 12 feet. 
.sunday...west winds 10 to 15 knots becoming northwest 15 to
20 knots in the late morning and early afternoon...then becoming
west 20 to 25 knots early in the evening decreasing to 15 to
20 knots in the late evening and early morning. showers likely...
then a chance of showers in the late evening and early morning.
waves 4 to 6 feet building to 6 to 9 feet until early morning.
waves occasionally around 12 feet. 


$$

fzus63 kdtx 151342
glflh 
expires:202510152145;;179482

open lake forecast for lake huron
national weather service detroit/pontiac mi
942 am edt wed oct 15 2025

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...northeast flow backs to northwest by the late
afternoon and evening hours in the wake of a cold front.
expansive high pressure, 30.30 inches, will then build into the
great lakes through and will last through thursday.


lhz361-152145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
942 am edt wed oct 15 2025

.rest of today...northeast winds 5 to 10 knots late in the
morning becoming light and variable...then becoming northwest
5 to 10 knots late in the afternoon. waves 2 feet or less. 
.tonight...northwest winds 5 to 10 knots. waves 2 feet or less. 
.thursday...light and variable winds. waves 2 feet or less. 
.thursday night...light and variable winds becoming southeast
5 to 10 knots in the late evening and overnight. showers likely
after midnight. waves 2 feet or less. 
.friday...south winds 10 to 15 knots. showers likely. waves 1 to
3 feet building to 4 to 6 feet. waves occasionally around 8 feet.
.saturday...south winds 15 to 20 knots decreasing to 5 to
10 knots. a chance of showers early in the morning...then showers
until early morning. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots
with gusts to around 30 knots until early morning. a chance of
showers early in the morning...then showers likely until early
evening. a chance of showers in the late evening and early
morning. waves 3 to 5 feet. 


$$

fzus63 kmkx 151351
glflm 
expires:202510152115;;179686

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 am cdt wed oct 15 2025

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

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

.synopsis...

high pressure of 30.4 inches will cross lake superior today and
tonight while weakening to 30.2 inches. the breezy east-northeast
winds will diminish by late morning and become southeast by
thursday morning. look for the southeast winds to become breezy 
again thursday night into friday morning as low pressure of 29.3 
inches develops in north dakota and lifts into manitoba. 

the low will further deepen to 29.1 inches as it reaches the 
northern manitoba-ontario border friday afternoon. gusty southerly
winds are expected over lake michigan as an associated surface
trough cold front approaches from minnesota. southerly gale force
gusts will be possible friday afternoon and evening over the 
north half of the lake. 

a surface low is expected to deepen to 29.5 inches as it crosses
lake michigan saturday night. gusty northerly winds are expected 
sunday with gales possible again, this time over southern lake 
michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-152115-
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 wed oct 15 2025

sheboygan wi to pentwater mi south...

.rest of today...east winds 10 to 15 kt becoming northeast.
scattered showers through mid morning. waves 3 to 5 ft subsiding
to 2 to 4 ft. 
.tonight...northeast winds 10 to 15 kt becoming east. waves 1 to
3 ft. 
.thursday...southeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.thursday night...southeast winds 10 to 20 kt becoming south
15 to 25 kt. chance of showers. waves 2 to 4 ft building to 4 to
7 ft occasionally to 9 ft. 
.friday...south winds to 30 kt. chance of showers. waves 7 to
10 ft occasionally to 13 ft building to 10 to 14 ft occasionally
to 18 ft. 
.friday night...south winds to 30 kt. showers likely. waves 8 to
12 ft occasionally to 16 ft subsiding to 8 to 11 ft occasionally
to 14 ft. 
.saturday...south winds to 30 kt becoming southwest 15 to 25 kt.
showers likely. waves 8 to 11 ft occasionally to 14 ft subsiding
to 6 to 9 ft occasionally to 12 ft. 
.sunday...northwest winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 8 to 11 ft occasionally to 14 ft
building to 10 to 14 ft occasionally to 18 ft.  

$$

fzus63 kmkx 151351
glflm 
expires:202510152115;;179685

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 am cdt wed oct 15 2025

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

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

.synopsis...

high pressure of 30.4 inches will cross lake superior today and
tonight while weakening to 30.2 inches. the breezy east-northeast
winds will diminish by late morning and become southeast by
thursday morning. look for the southeast winds to become breezy 
again thursday night into friday morning as low pressure of 29.3 
inches develops in north dakota and lifts into manitoba. 

the low will further deepen to 29.1 inches as it reaches the 
northern manitoba-ontario border friday afternoon. gusty southerly
winds are expected over lake michigan as an associated surface
trough cold front approaches from minnesota. southerly gale force
gusts will be possible friday afternoon and evening over the 
north half of the lake. 

a surface low is expected to deepen to 29.5 inches as it crosses
lake michigan saturday night. gusty northerly winds are expected 
sunday with gales possible again, this time over southern lake 
michigan.


lmz261-362-364-366-563-565-567-868-152115-
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 wed oct 15 2025

sheboygan wi to pentwater mi north...

.rest of today...northeast winds 5 to 10 kt becoming north 10 to
15 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tonight...north winds 10 to 15 kt becoming northeast. waves 1 to
2 ft. 
.thursday...east winds 10 to 15 kt veering to south 10 to 20 kt.
waves 2 to 4 ft. 
.thursday night...south winds 10 to 20 kt increasing to 15 to
25 kt. chance of showers in the evening, then showers likely
overnight. waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft. 
.friday...south winds to 30 kt. chance of showers. waves 7 to
10 ft occasionally to 13 ft building to 10 to 14 ft occasionally
to 18 ft. 
.friday night...south winds to 30 kt. showers likely. waves 10 to
14 ft occasionally to 18 ft subsiding to 8 to 11 ft occasionally
to 14 ft. 
.saturday...south winds to 30 kt becoming southwest 15 to 25 kt.
showers likely. waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft. 
.sunday...northwest winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180084

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed oct 15 2025 /901 am cdt wed oct 15 2025/

.rest of today...southeast winds 5 to 15 knots backing east in
the afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast late. a
slight chance of rain after midnight. waves calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots. a chance of rain
through early afternoon, then rain by mid afternoon. waves calm
to 2 feet. 
.thursday night...southeast winds 10 to 20 knots veering south
after midnight. rain likely through midnight, then a chance of
rain after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.friday...south winds 15 to 25 knots. a chance of showers. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.friday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a chance of showers. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180085

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz263-152000-
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 wed oct 15 2025

.rest of today...west winds less than 10 knots becoming southwest
5 to 15 knots late. waves calm to 2 feet. 
.tonight...southwest winds less than 10 knots becoming southeast
5 to 15 knots after midnight, then veering south late. waves calm
to 2 feet. 
.thursday...southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain through early
afternoon, then rain likely by mid afternoon. waves calm to
2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. rain through midnight, then a chance of
rain after midnight. waves building to 2 to 4 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. a chance of showers. waves building to
3 to 5 feet occasionally to 7 feet. 
.friday night...southwest winds 15 to 25 knots. a chance of
showers. waves subsiding to 2 to 4 feet. 
.saturday...southwest winds 20 to 30 knots veering west. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.sunday...west gales to 35 knots diminishing to 15 to 25 knots.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180086

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt wed oct 15 2025

.rest of today...west winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then diminishing to less than 10 knots
late. waves calm to 2 feet. 
.tonight...west winds less than 10 knots backing southwest after
midnight, then becoming south 5 to 15 knots late. waves calm to
2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing southeast late. a chance
of rain by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...south winds 15 to 25 knots. rain. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 15 to 25 knots. a chance of showers. waves
3 to 6 feet occasionally to 8 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. showers likely through midnight, then a chance of
showers after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southwest winds 20 to 30 knots veering west. a chance
of showers. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.sunday...west gales to 35 knots diminishing to 15 to 25 knots. a
chance of showers. waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180087

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt wed oct 15 2025

.rest of today...northwest winds 5 to 15 knots veering north
late. waves calm to 2 feet. 
.tonight...west winds less than 10 knots becoming south 5 to
15 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a chance of rain by mid afternoon. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots. rain. waves
building to 1 to 3 feet. 
.friday...south winds 20 to 30 knots. a chance of showers. waves
building to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. showers likely. waves subsiding to calm
to 2 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180088

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz266-152000-
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 wed oct 15 2025

.rest of today...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northwest winds less than 10 knots increasing to 5 to
15 knots after midnight, then backing south late. waves calm to
2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming southeast 15 to 25 knots
late. a chance of rain by mid afternoon. waves building to 1 to
3 feet. 
.thursday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. rain. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...south gales to 35 knots. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.friday night...south gales to 35 knots diminishing to 20 to
30 knots after midnight. showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots. showers likely, then a
chance of showers. waves subsiding to 2 to 4 feet, then building
to 3 to 5 feet occasionally to 7 feet. 
.sunday...west winds 20 to 30 knots. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202510152000;;180089

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed oct 15 2025

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...

30.4 inch high pressure over lake superior today gradually weakens 
to 30.1 inches as it shifts eastward across the great lakes through 
thursday evening. a deepening 29.3 inch low develops over the 
northern plains thursday night and and lifts near lake winnipeg at 
29.2 inches friday morning. this will send 29.5 inch troughing over 
lake superior friday into saturday as the low moves to hudson bay. a 
secondary low deepens to 29.3 inches near the straits of mackinac 
sunday morning and moves over james bay by sunday night. 29.8 inch 
ridging returns to lake superior on monday.



lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt wed oct 15 2025

.rest of today...north winds 5 to 15 knots backing northwest in
the afternoon. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north late.
waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering southeast in the
afternoon. a slight chance of rain by mid afternoon. waves calm
to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight. rain. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. showers likely through early
afternoon, then a chance of showers by mid afternoon. waves
building to 5 to 8 feet occasionally to 10 feet. 
.friday night...south gales to 35 knots diminishing to 20 to
30 knots after midnight. showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...south winds 15 to 25 knots becoming west 10 to
20 knots. showers. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots backing west. showers
likely, then a chance of showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$