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Marine Forecast

Issued 03:00 AM EST 11 December 2025

Today Tonight and Friday.

Wind west 15 knots increasing to west 20 to 30 early this morning. Wind west 20 to 30 tonight. Wind west 15 to 25 Friday.

Snow ending this evening. Visibility as low as 1 mile in snow.

Temperatures minus 4 falling to minus 9 near noon then rising to minus 3 Friday afternoon. Temperatures falling to minus 8 Friday evening.

Extended Forecast

Issued 06:00 AM EST 11 December 2025
Saturday Wind southerly 10 to 15 knots.
Sunday Wind west 15 knots.
Monday Wind light becoming southwest 10 to 15 knots late in the day.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island 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 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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buoy Buoy
land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 11 December 2025 Today Tonight and Friday At 3:00 a.m. EST today low 989 mb located near Trois-Rivières.
By 7:00 p.m. EST Friday low 972 mb located over Labrador Sea.

At 7:00 a.m. EST Friday ridge located on a line north-south over
Lake Superior.
By 7:00 p.m. EST Friday ridge located on a line north-south over
Lake Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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