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Lake Simcoe

Warnings

Forecast

Marine Forecast

Issued 05:00 PM EDT 16 June 2026

Tonight and Wednesday.

Wind southwest 10 knots becoming light early this evening then becoming southwest 15 near midnight. Wind diminishing to southeast 10 Wednesday evening.

Scattered showers with a risk of thunderstorms.

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

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

Lake Simcoe

Issued 4:29 PM EDT 16 June 2026 Conditions are favourable for the development of squalls with wind gusts up to 35 knots, hail and poor to very poor visibility in thunderstorms heavy at times.

Thunderstorms moving west to east may track across portions of Lake Huron, Lake St. Clair and Lake Simcoe this afternoon or evening.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

There is no Synopsis issued for this area.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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