Language selection

My Weather Profile Weather Topics  | 

Western Lake Ontario


Marine Forecast

Issued 06:30 PM EDT 31 July 2021

Tonight and Sunday.

Wind south 10 knots becoming light near midnight then becoming north 15 Sunday evening.

Scattered showers ending Sunday morning. Risk of thunderstorms and waterspouts overnight and Sunday.


Issued 06:30 PM EDT 31 July 2021
Tonight and Sunday. Waves one half metre or less subsiding to less than one half metre late overnight.

Extended Forecast

Issued 06:30 PM EDT 31 July 2021
Monday Wind north 15 knots becoming southwest 15 in the afternoon.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind light.

Stay connected


Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Great Lakes - Lake Erie and Lake Ontario 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 31 July 2021 Tonight and Sunday At 6:30 p.m. EDT tonight low 1011 mb located east of Lake Superior.
By 6:30 p.m. EDT Sunday low 1010 mb located over New York State.

At 6:30 p.m. EDT tonight ridge located on a line north-south
over Saskatchewan.
By 6:30 p.m. EDT Sunday ridge located from Minnesota to James Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

What we are doing

Date modified: