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Eastern Lake Superior

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 June 2025

Tonight and Monday.

Wind light becoming south 10 knots late overnight then backing to southeast 10 Monday afternoon.

Scattered showers Monday evening with a risk of thunderstorms. Fog patches forming Monday morning.

Waves

Issued 06:30 PM EDT 15 June 2025
Tonight and Monday. Waves 0.5 metres or less.

Extended Forecast

Issued 06:30 PM EDT 15 June 2025
Tuesday Wind east 20 knots becoming west 20 in the afternoon.
Wednesday Wind light.
Thursday Wind light.

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Map of Great Lakes - Lake Superior marine weather areas Pukaskwa National Park Marathon Airport Caribou Island Armstrong Airport Royal Island Kenora Airport Thunder Bay Airport Welcome Island Lake Of the Woods - 45148 Little Flatland Island Sault Ste. Marie Airport Wawa Airport Slate Island - 45136
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 15 June 2025 Tonight and Monday At 6:30 p.m. EDT tonight high 1022 mb located over southern Quebec.
By 6:30 p.m. EDT Monday departing high 1024 mb located east of
Nova Scotia.

By 6:30 p.m. EDT Monday low 1004 mb located over northwestern
Minnesota.

Great Lakes - Lake Superior Area

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