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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 13 June 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind southwest 15 knots increasing to southwest 20 this afternoon then diminishing to west 10 this evening. Wind increasing to west 15 near noon Sunday and to west 20 Sunday afternoon.

Showers and fog patches with a risk of thunderstorms changing to rain Sunday morning and ending Sunday afternoon.

Waves

Issued 10:30 AM EDT 13 June 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight then building to 0.5 to 1 Sunday afternoon.

Extended Forecast

Issued 03:00 AM EDT 13 June 2026
Monday Wind northwest 20 knots backing to southwest 15 late in the day.
Tuesday Wind light becoming south 15 knots late in the day.
Wednesday Wind light becoming southeast 15 knots 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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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

Southern Georgian Bay

Issued 10:30 AM EDT 13 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.

Watches (In effect)

Squall watch in effect

Southern Georgian Bay

Issued 1:28 PM EDT 13 June 2026 Thunderstorms are expected to affect the area this afternoon and continue into the early evening. Some of these thunderstorms may be capable of producing very strong wind gusts up to 45 knots. Sizeable hail may also be a concern.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

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

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 13 June 2026 Today Tonight and Sunday At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over Lake Ontario.
By 10:30 a.m. EDT Sunday departing ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 10:30 a.m. EDT today trough located on a line northeast-southwest
over Lake Superior.
By 10:30 a.m. EDT Sunday trough located on a line
northeast-southwest over southern Ontario.

At 10:30 a.m. EDT today low 995 mb located west of James Bay.
By 10:30 a.m. EDT Sunday low 995 mb located over eastern Hudson Bay.

Great Lakes - Lake Huron Area

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