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Eastern Lake Ontario


Marine Forecast

Issued 10:30 AM EDT 09 May 2021

Today Tonight and Monday.

Strong wind warning in effect.

Wind southwest 10 knots becoming light this afternoon then becoming northwest 10 late overnight. Wind increasing to west 15 Monday morning and to west 20 Monday afternoon.


Issued 10:30 AM EDT 09 May 2021
Today Tonight and Monday. Waves one half metre subsiding to less than one half metre this afternoon then building to one half to one metre Monday morning. Waves building to one and one half metres Monday evening.

Extended Forecast

Issued 03:00 AM EDT 09 May 2021
Tuesday Wind west 15 knots increasing to west 20 in the afternoon.
Wednesday Wind northwest 15 knots.
Thursday Wind northwest 15 knots backing to southwest 15.

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Map of Great Lakes - Lake Huron marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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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 9 May 2021 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 09 May 2021

'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 or Weatheradio stations.


Technical Marine Synopsis

Issued 10:30 AM EDT 9 May 2021 Today Tonight and Monday At 10:30 a.m. EDT today trough located from James Bay to the Gulf
of St. Lawrence.
By 10:30 a.m. EDT Monday trough located from Lake Nipissing to
the Maritimes.

At 10:30 a.m. EDT today ridge located from Lake Nipigon to Lake
Huron then to Ohio.
By 10:30 a.m. EDT Monday ridge located from Lake of the Woods to
Lower Michigan then to Lake Ontario.

At 10:30 a.m. EDT today low 1002 mb located over central Illinois.
By 10:30 a.m. EDT Monday low 1008 mb located off the East Coast
of the U.S.

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