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 302230
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 Sunday 30 March 2025 for tonight and Monday.
The next scheduled forecast will be issued at 3:00 a.m. EDT Monday.

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 northeast 25 knots backing to north 20 near midnight then to
 northwest 20 Monday afternoon. Wind veering to north 15 Monday
 evening. Scattered flurries this evening. Risk of freezing spray
 Monday.

Eastern Lake Superior.
Freezing spray warning in effect.
Wind northeast 30 knots backing to north 25 late overnight then
 diminishing to north 15 Monday evening. Snow changing to scattered
 flurries overnight and ending Monday morning. Visibility 1 mile or
 less in snow. Freezing spray beginning overnight and ending early
 Monday evening. Risk of freezing spray Monday late in the day.

Whitefish Bay.
Wind northeast 15 knots backing to north 20 near midnight then to
 northwest 20 near noon Monday. Wind veering to north 15 Monday
 evening. Freezing rain changing to snow late overnight then to
 scattered flurries Monday morning and ending near noon Monday.
 Visibility 1 mile or less in freezing rain.

Northern Lake Huron.
Wind southwest 30 knots except north 25 near the north end. Wind
 diminishing to west 25 late overnight then veering to northwest 20
 Monday morning. Wind increasing to northwest 25 Monday afternoon
 then veering to north 20 Monday evening. Periods of rain with a risk
 of thunderstorms changing to scattered flurries Monday morning and
 ending Monday afternoon. Fog patches dissipating late overnight.

Southern Lake Huron.
Wind south 20 knots increasing to southwest 30 this evening then
 diminishing to northwest 20 Monday morning. Wind increasing to
 northwest 25 Monday evening. Showers with a risk of thunderstorms
 becoming scattered flurries or scattered showers Monday morning and
 ending near noon Monday. Fog patches dissipating late overnight.

Northern Georgian Bay.
Wind east 30 knots diminishing to southwest 20 near midnight then
 veering to northwest 20 early Monday morning. Wind diminishing to
 northwest 15 Monday afternoon. Rain and fog patches with a risk of
 thunderstorms changing to scattered flurries or scattered showers
 Monday morning and ending near noon Monday.

Southern Georgian Bay.
Wind southeast 25 knots veering to south 20 near midnight then to
 southwest 20 early Monday morning. Wind veering to northwest 15 near
 noon Monday then to north 15 Monday evening. Periods of rain and fog
 patches with a risk of thunderstorms changing to scattered flurries
 or scattered showers Monday morning and ending near noon Monday.

Lake St. Clair.
Wind south 20 knots veering to southwest 20 this evening then
 diminishing to southwest 15 late overnight. Wind veering to
 northwest 15 Monday morning then diminishing to north 10 Monday
 afternoon. Showers ending near noon Monday. Risk of thunderstorms
 tonight. Fog patches dissipating late overnight.

Western Lake Erie.
Wind south 20 knots veering to southwest 20 this evening then to west
 15 Monday morning. Wind veering to northwest 15 Monday afternoon
 then diminishing to north 10 Monday evening. Showers ending Monday
 afternoon. Risk of thunderstorms tonight. Fog patches dissipating
 Monday morning.

Eastern Lake Erie.
Wind south 20 knots veering to southwest 20 near midnight then to
 west 20 Monday morning. Wind veering to northwest 15 Monday
 afternoon. Showers ending Monday afternoon. Risk of thunderstorms
 tonight. Fog patches dissipating Monday morning.

Western Lake Ontario.
Wind east 10 knots increasing to southwest 15 this evening and to
 southwest 20 late overnight. Wind veering to west 20 Monday
 afternoon then to northwest 20 Monday evening. Rain changing to
 showers this evening and ending near noon Monday with a risk of
 thunderstorms. Fog patches dissipating near noon Monday.

Eastern Lake Ontario.
Wind east 10 knots increasing to southeast 15 this evening then
 veering to southwest 20 late overnight. Wind veering to west 25
 Monday afternoon then to northwest 20 Monday evening. Rain changing
 to showers this evening and ending Monday afternoon with a risk of
 thunderstorms. Fog patches dissipating near noon Monday.

Kingston to Cornwall.
Wind northeast 10 knots becoming light this evening then becoming
 south 15 late overnight. Wind veering to southwest 15 Monday morning
 then diminishing to west 10 Monday afternoon. Rain changing to
 showers overnight. Risk of thunderstorms overnight and Monday
 morning. Fog patches dissipating near noon Monday.

End
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