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Southern Georgian Bay


Marine Forecast

Issued 09:59 PM EDT 01 August 2021

Tonight and Monday.

Wind northwest 15 knots diminishing to north 10 late overnight then becoming light Monday morning. Wind becoming southwest 10 early Monday evening then increasing to southwest 15 late Monday evening.


Issued 06:30 PM EDT 01 August 2021
Tonight and Monday. Waves one half to one metre subsiding to one half metre or less early Monday morning then building to one half to one metre Monday evening.

Extended Forecast

Issued 06:30 PM EDT 01 August 2021
Tuesday Wind southwest 15 knots diminishing to light in the afternoon.
Wednesday Wind light.
Thursday Wind light.

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Weather Conditions

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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
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 9 May 2021 Forecasts have ended for the season.

No watches or warnings in effect.


Technical Marine Synopsis

Issued 6:30 PM EDT 1 August 2021 Tonight and Monday At 6:30 p.m. EDT tonight low 1009 mb located east of Lake Ontario.
By 6:30 p.m. EDT Monday low 1010 mb located northeast of Nova

At 6:30 p.m. EDT tonight ridge located on a line north-south over
North Dakota.
By 6:30 p.m. EDT Monday ridge located on a line east-west over

By 6:30 p.m. EDT Monday approaching low 1010 mb located over
northwestern Hudson Bay.

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