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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 September 2026

Today Tonight and Thursday.

Strong wind warning in effect.

Wind southwest 20 knots veering to west 25 early this morning then to northwest 25 this evening. Wind diminishing to northwest 15 Thursday morning and to variable 10 near noon Thursday. Wind increasing to southwest 15 Thursday afternoon.

Scattered showers this afternoon and this evening.

Waves

Issued 03:00 AM EDT 09 September 2026
Today Tonight and Thursday. Waves 1 to 1.5 metres building to 2 this morning then subsiding to 1 to 1.5 overnight. Waves subsiding to 0.5 to 1 Thursday morning.

Extended Forecast

Issued 03:00 AM EDT 09 September 2026
Friday Wind south 15 knots increasing to south 20 late in the day.
Saturday Wind south 25 knots veering to west 25.
Sunday Wind northwest 20 knots.

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Map of Great Lakes - Lake Superior marine weather areas Royal Island Kenora Airport Sault Ste. Marie Airport Armstrong Airport Caribou Island Marathon Airport Pukaskwa National Park Wawa Airport Thunder Bay Airport Welcome Island Little Flatland Island Slate Island - 45136 Lake Of the Woods - 45148
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land station Land Station
Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 03:00 AM EDT 09 September 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 September 2026 Today Tonight and Thursday At 3:00 a.m. EDT today departing ridge located on a line north-south
over New Brunswick.

At 3:00 a.m. EDT today low 990 mb located south of Hudson Bay.
By 3:00 a.m. EDT Thursday low 982 mb located over eastern Hudson
Bay.

At 3:00 a.m. EDT today cold front from low located on a line
north-south over Thunder Bay.
By 3:00 a.m. EDT Thursday cold front from low located on a line
northeast-southwest over Montréal.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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