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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 17 June 2026

Today Tonight and Thursday.

Strong wind warning in effect.

Wind southeast 10 knots veering to southwest 10 near noon then increasing to southeast 15 early this evening. Wind increasing to southwest 20 early Thursday morning and to southwest 25 near noon Thursday.

Scattered showers ending this afternoon. Rain beginning this evening with a risk of thunderstorms and changing to scattered showers Thursday morning.

Waves

Issued 10:30 AM EDT 17 June 2026
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1 to 1.5 Thursday morning. Waves building to 2 Thursday afternoon.

Extended Forecast

Issued 03:00 AM EDT 17 June 2026
Friday Wind west 20 to 25 knots.
Saturday Wind west 20 knots.
Sunday Wind west 15 knots diminishing to light late in the day.

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

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 10:30 AM EDT 17 June 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. 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 17 June 2026 Today Tonight and Thursday At 10:30 a.m. EDT today trough from 990 mb low located over
Minnesota.
By 10:30 a.m. EDT Thursday trough from 989 mb low located east of
Lake Nipissing.

By 10:30 a.m. EDT Thursday ridge located on a line
northeast-southwest over Nebraska.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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