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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 13 April 2026

Today Tonight and Tuesday.

Wind northwest 10 knots becoming light early this evening then becoming northeast 15 near midnight. Wind diminishing to northeast 10 near noon Tuesday.

Drizzle beginning near noon changing to showers Tuesday morning. Fog patches forming early this evening.

Waves

Issued 10:30 AM EDT 13 April 2026
Today Tonight and Tuesday. Over open water waves 0.5 to 1 metre subsiding to 0.5 or less this afternoon then building to 0.5 to 1 late overnight. Waves subsiding to 0.5 or less Tuesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 13 April 2026
Wednesday Wind light.
Thursday Wind light becoming northeast 15 knots.
Friday Wind northeast 15 knots veering to southeast 20 late in the day.

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 10:30 AM EDT 13 April 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today departing trough located on a line
northeast-southwest over northeastern Ontario.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over Manitoba.
By 10:30 a.m. EDT Tuesday departing ridge located on a line
northwest-southeast over northern Quebec.

At 10:30 a.m. EDT today low 1002 mb located over eastern Nebraska.
By 10:30 a.m. EDT Tuesday low 1006 mb located near Lake Huron.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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