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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 September 2026

Today Tonight and Wednesday.

Gale warning in effect.

Wind southwest 20 knots increasing to west 35 near noon then diminishing to west 25 early this evening. Wind veering to northwest 20 late this evening then diminishing to northwest 15 late overnight. Wind diminishing to north 10 Wednesday morning then becoming light Wednesday afternoon. Wind becoming south 10 Wednesday evening.

Waves

Issued 10:30 AM EDT 15 September 2026
Today Tonight and Wednesday. Waves 2 to 3 metres subsiding to 1 to 1.5 near midnight and to 0.5 to 1 early Wednesday morning. Waves subsiding to 0.5 or less near noon Wednesday.

Extended Forecast

Issued 03:00 AM EDT 15 September 2026
Thursday Wind light becoming northwest 15 knots in the afternoon.
Friday Wind northeast 15 knots diminishing to light.
Saturday Wind light.

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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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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)

Gale warning in effect

Western Lake Superior

Issued 10:30 AM EDT 15 September 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 10:30 AM EDT 15 September 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today quasi-stationary ridge from 1030 mb high
located on a line northeast-southwest over the East Coast of
the U.S.

At 10:30 a.m. EDT today low 994 mb located southwest of Hudson Bay.
By 10:30 a.m. EDT Wednesday low 998 mb located over northern Quebec.

Great Lakes - Lake Superior Area

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