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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 21 April 2026

Today Tonight and Wednesday.

Wind variable 10 knots becoming light near midnight then becoming east 10 Wednesday afternoon.

Waves

Issued 10:30 AM EDT 21 April 2026
Today Tonight and Wednesday. Waves 1.5 metres subsiding to 0.5 or less near noon.

Extended Forecast

Issued 03:00 AM EDT 21 April 2026
Thursday Wind southeast 15 knots increasing to southeast 25 late in the day.
Friday Wind southeast 25 knots.
Saturday Wind northwest 15 knots diminishing to light late in the day.

Ice Forecast*

Issued 12:00 PM EDT 21 April 2026 Today Tonight and Wednesday Open water except 2 tenths thick lake ice along parts of the southern and eastern shores.

*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 21 April 2026 Today Tonight and Wednesday

Ice Coverage

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

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 21 April 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over New Brunswick.
By 10:30 a.m. EDT Wednesday ridge located on a line north-south
over Nova Scotia.

At 10:30 a.m. EDT today trough located on a line north-south over
Lake Superior.
By 10:30 a.m. EDT Wednesday trough located on a line north-south
over Quebec.

Great Lakes - Lake Superior Area

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