Language selection

Government of Canada / Gouvernement du Canada

Search

Features

Colour-coded Weather Alerts

Colour-coded Weather Alerts

Weather shortcuts

Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 15 December 2025

Today Tonight and Tuesday.

Wind northwest 15 knots backing to west 15 early this morning then increasing to southwest 30 near noon. Wind veering to west 25 this evening then diminishing to west 15 overnight. Wind backing to southwest 15 Tuesday morning then increasing to southwest 20 Tuesday evening.

Scattered flurries beginning early this morning and ending Tuesday afternoon.

Waves

Issued 03:00 AM EST 15 December 2025
Today Tonight and Tuesday. Waves 0.5 to 1 metre building to 1 to 1.5 this morning and to 2 to 3 this afternoon. Waves subsiding to 1 Tuesday morning then building to 1.5 Tuesday evening.

Extended Forecast

Issued 03:00 AM EST 15 December 2025
Wednesday Wind southwest 30 knots diminishing to light late in the day.
Thursday Wind south 20 knots increasing to south 30.
Friday Wind southwest 35 knots diminishing to northwest 20 late in the day.

Stay connected

ATOM

List of Official Text Forecasts
Resources

Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
Legend:
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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 15 December 2025 Today Tonight and Tuesday At 3:00 a.m. EST today high 1037 mb located over southern Illinois.
By 3:00 a.m. EST Tuesday high 1030 mb located over North Carolina.

At 3:00 a.m. EST today trough located on a line northeast-southwest
over the Ontario - Manitoba border.
By 3:00 a.m. EST Tuesday trough located on a line
northeast-southwest over Georgian Bay.

By 3:00 a.m. EST Tuesday approaching low 988 mb located over
southern Saskatchewan.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

Weather shortcuts


How to use
  • Add to shortcuts
    • Go to the desired page on the site, open the Weather shortcuts menu and click on the "Add to shortcuts" button
    • Page name will display in the "Add this page" window, the name can be changed by highlighting the text and entering the desired name
    • Click on the "Save" button to add the link to the list
    • Click on the "X" button to close the panel
  • Delete a link
    • Click on the "Organize shortcuts" button
    • Select the link to delete
    • Click on the "Delete" button to remove the link from the list
    • Click on the "Close" button to save the change
  • Move a link up/down the list
    • Click on the "Organize shortcuts" button
    • Click and hold the link and move to new location in the list
    • Click on the "Close" button to save the change
  • Rename a link
    • Click on the "Organize shortcuts" button
    • Select the link to rename
    • Click on the "Rename" button and change the link name
    • Click the enter or tab key
    • Click on the "Close" button to save the change
  • Keyboard navigation
    • Use the Tab key to move to a button or link
    • Use the Enter key to click on buttons or links
    • Organize shortcuts navigation
      • Use the ↑ Up key to select the link above. If none are selected, it will select the first link.
      • Use the ↓ Down key to select the link below. If none are selected, it will select the last link.
      • Use the Page Up key to move a selection up in the list.
      • Use the Page Down key to move a selection down in the list.
  • Restore default list

    Warning: Clicking on the button below will remove all your customized links.

Customized Weather shortcuts

Save your customized list as a bookmark.

Copy/paste or click on the link below then when the page displays, you can bookmark the page using the web browser. Bookmarking your customized list will allow you to access it even if the local storage on your device is erased.

Feedbackabout this web site
Date modified: