Marine Forecasts for the Great Lakes and St. Lawrence River (On)

Choose a Province or Territory

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* NOTE: Corrected and/or amended bulletins are listed first *

 
FQCN13 CWTO 102230
Marine forecasts for the Canadian portion of the Great Lakes and the
Ontario portion of the St. Lawrence River issued by Environment
Canada at 6:30 p.m. EDT Tuesday 10 March 2026 for tonight and
Wednesday.
The next scheduled forecast will be issued at 3:00 a.m. EDT
Wednesday.

Fog implies visibility less than 1 mile.

Winds are for offshore areas. Nearshore winds may vary considerably
due to shoreline effects.

Western Lake Superior.
Wind east 20 knots backing to northeast 15 near midnight then to
 north 20 near noon Wednesday. Periods of snow overnight and
 Wednesday. Scattered flurries Wednesday evening. Visibility as low
 as 1 mile in snow.

Eastern Lake Superior.
Wind northeast 20 knots backing to north 20 Wednesday morning then
 increasing to north 25 Wednesday afternoon. Periods of snow
 overnight and Wednesday. Visibility 1 mile or less in snow.

Whitefish Bay.
Wind east 10 knots increasing to east 15 this evening then
 diminishing to northeast 10 late overnight. Wind backing to north 10
 near noon Wednesday then increasing to north 20 Wednesday evening.
 Periods of snow overnight and Wednesday. Visibility 1 mile or less
 in snow.

Northern Lake Huron.
Wind northeast 25 knots increasing to northeast 30 near midnight then
 backing to northwest 25 Wednesday evening. Drizzle changing to
 freezing rain near midnight then to drizzle or freezing drizzle and
 fog patches Wednesday morning. Freezing rain Wednesday afternoon
 changing to periods of snow Wednesday evening. Visibility 1 mile or
 less in fog patches and in snow.

Southern Lake Huron.
Wind northeast 25 knots backing to northwest 25 Wednesday evening.
 Drizzle changing to showers near midnight with a risk of
 thunderstorms then to drizzle and fog patches Wednesday morning with
 a risk of freezing drizzle then to showers Wednesday afternoon.

Northern Georgian Bay.
Wind northeast 20 knots increasing to northeast 25 this evening then
 backing to northwest 25 Wednesday evening. Scattered flurries with a
 risk of freezing drizzle changing to freezing rain after midnight
 then to freezing drizzle and fog patches Wednesday morning. Freezing
 rain Wednesday afternoon and evening.

Southern Georgian Bay.
Wind northeast 20 knots diminishing to northeast 15 near noon
 Wednesday then increasing to northwest 25 Wednesday evening. Drizzle
 with a risk of freezing drizzle changing to freezing rain after
 midnight with a risk of thunderstorms then to drizzle and fog
 patches Wednesday morning with a risk of freezing drizzle then to
 freezing rain Wednesday evening.

Lake St. Clair.
Wind northeast 10 knots becoming variable 10 near midnight then
 increasing to southwest 20 near noon Wednesday. Wind veering to
 northwest 20 Wednesday evening. Showers or scattered flurries with a
 risk of thunderstorms.

Western Lake Erie.
Wind variable 10 knots increasing to south 15 near midnight then
 veering to southwest 20 early Wednesday morning. Wind increasing to
 southwest 30 near noon Wednesday then diminishing to northwest 20
 Wednesday evening. Showers with a risk of thunderstorms.

Eastern Lake Erie.
Wind east 15 knots increasing to southwest 20 early Wednesday morning
 and to southwest 30 Wednesday afternoon. Wind diminishing to
 northwest 20 Wednesday evening. Showers with a risk of
 thunderstorms.

Western Lake Ontario.
Wind northeast 15 knots increasing to northeast 20 near midnight then
 veering to east 20 late overnight. Wind diminishing to east 15 near
 noon Wednesday then increasing to southwest 30 Wednesday evening.
 Scattered showers with a risk of thunderstorms changing to drizzle
 and fog patches near noon Wednesday then to showers Wednesday
 evening with a risk of thunderstorms.

Eastern Lake Ontario.
Wind northeast 15 knots increasing to northeast 20 this evening then
 diminishing to northeast 15 near noon Wednesday. Wind increasing to
 southwest 30 Wednesday evening. Scattered showers changing to
 drizzle and fog patches Wednesday afternoon then to showers
 Wednesday evening. Risk of thunderstorms tonight and Wednesday.

Kingston to Cornwall.
Forecasts have ended for the season.

End
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