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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 August 2026

Today Tonight and Monday.

Wind northwest 15 knots diminishing to west 10 this morning then increasing to southwest 15 this afternoon. Wind diminishing to southwest 10 this evening then increasing to southwest 15 overnight. Wind diminishing to southwest 10 Monday morning then increasing to west 15 Monday afternoon.

Scattered showers overnight and Monday with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 09 August 2026
Today Tonight and Monday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 03:00 AM EDT 09 August 2026
Tuesday Wind northwest 15 knots diminishing to light in the morning.
Wednesday Wind light.
Thursday Wind light becoming northwest 15 knots late in the day.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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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 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 August 2026 Today Tonight and Monday At 3:00 a.m. EDT today departing cold front located on a line
northeast-southwest over the East Coast of the U.S.

At 3:00 a.m. EDT today ridge located on a line north-south over
Lower Michigan.
By 3:00 a.m. EDT Monday ridge from high located on a line
northeast-southwest over Pennsylvania.

By 3:00 a.m. EDT Monday approaching low 1010 mb located near
Lake Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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