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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 14 April 2026

Today Tonight and Wednesday.

Wind northeast 15 knots diminishing to northeast 10 near noon then becoming light near midnight. Wind light Wednesday.

Drizzle changing to showers this afternoon with a risk of thunderstorms then to drizzle this evening and ending near noon Wednesday. Fog patches.

Waves

Issued 03:00 AM EDT 14 April 2026
Today Tonight and Wednesday. Over open water waves 0.5 metres or less building to 0.5 to 1 early this morning then subsiding to 0.5 or less this afternoon.

Extended Forecast

Issued 03:00 AM EDT 14 April 2026
Thursday Wind light.
Friday Wind northeast 15 knots veering to southeast 20 late in the day.
Saturday Wind southeast 20 knots increasing to northwest 25.

Ice Forecast*

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday Open water except 2 tenths thick lake ice along parts of the southwestern shore and in and near Thunder Bay. Consolidated rotten thick lake ice in southern Chequamegon Bay. Consolidated very thick lake ice in Black Bay, Nipigon Bay and Thunder Bay.

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Superior marine weather areas Kenora Airport Pukaskwa National Park Royal Island Armstrong Airport Caribou Island Marathon Airport Thunder Bay Airport Welcome Island Little Flatland Island Sault Ste. Marie Airport Wawa Airport 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 13 April 2026 Today Tonight and Tuesday

Ice Coverage

Open water except 2 tenths thick lake ice along parts of the
southwestern shore and in and near Thunder Bay. Consolidated rotten
thick lake ice in southern Chequamegon Bay. Consolidated very thick
lake ice in Black Bay, Nipigon Bay and Thunder Bay.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 14 April 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today high 1019 mb located over James Bay.
By 3:00 a.m. EDT Wednesday departing high 1025 mb located over
eastern Quebec.

At 3:00 a.m. EDT today low 1002 mb located over southern Wisconsin.
By 3:00 a.m. EDT Wednesday low 1009 mb located over Maine.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Nebraska.
By 3:00 a.m. EDT Wednesday trough located from Kansas to Michigan.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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