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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 April 2026

Today Tonight and Sunday.

Wind northwest 30 knots backing to west 30 this afternoon then veering to northwest 25 near midnight. Wind diminishing to northwest 15 Sunday evening.

Showers and fog patches with a risk of thunderstorms becoming scattered flurries or scattered showers early this morning and ending Sunday morning. Visibility 1 mile or less in fog patches and in flurries.

Waves

Issued 03:00 AM EDT 18 April 2026
Today Tonight and Sunday. Over open water waves 2 to 3 metres subsiding to 1.5 near noon Sunday.

Extended Forecast

Issued 03:00 AM EDT 18 April 2026
Monday Wind northwest 15 knots diminishing to light in the morning then increasing to south 25 late in the day.
Tuesday Wind south 25 knots diminishing to northwest 15 late in the day.
Wednesday Wind north 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 17 April 2026 Today Tonight and Saturday Open water except 2 tenths thick lake ice near parts of the southern and eastern shores. Consolidated rotten thick lake ice along parts of the southern shore.

*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 17 April 2026 Today Tonight and Saturday

Ice Coverage

Open water except 2 tenths thick lake ice near parts of the southern
and eastern shores. Consolidated rotten thick lake ice along parts
of the southern shore.

Warnings

Warnings (Ended)

Gale warning ended

Eastern Lake Superior

Issued 03:00 AM EDT 18 April 2026
Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 18 April 2026 Today Tonight and Sunday At 3:00 a.m. EDT today low 994 mb located over northeastern Ontario.
By 3:00 a.m. EDT Sunday low 981 mb located over eastern Hudson Bay.

At 3:00 a.m. EDT today cold front located on a line north-south
over eastern Lake Superior.
By 3:00 a.m. EDT Sunday cold front from low located on a line
northeast-southwest over the St. Lawrence River.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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