Language selection

Government of Canada / Gouvernement du Canada

Search

Weather shortcuts

Eastern Lake Ontario: Past 24 Hour Conditions

Warnings

 

Grimsby - 45139

09:00 AM EDT 21 July 2026Buoy position: 43.27N 79.54W
Disclaimer

This table is a summary of hourly weather conditions for the past 24 hours.
Please note that these observations might not always be representative of weather conditions over their associated marine area.
Date / Time
(EDT)		 Wind(knots) Wave height(m) Wave period(s) Pressure(kPa) Air temp(°C) Water temp(°C)
21 July 2026
9:00 SSW 19 gusts 27 0.18 2.0 100.1 25 22
8:00 SE 13 gusts 16 0.09 3.6 100.1 23 22
7:00 NE 5 gusts 5 0.07 3.7 100.4 22 22
6:00 WSW 10 gusts 29 0.21 2.1 100.4 23 22
5:00 SSW 15 gusts 19 0.26 2.1 100.3 24 22
4:00 SSW 13 gusts 17 0.28 2.3 100.4 23 22
3:00 S 16 gusts 20 0.35 2.6 100.4 23 21
2:00 S 11 gusts 14 0.17 1.9 100.6 22 21
1:00 SSE 12 gusts 14 0.20 2.0 100.7 22 21
0:00 S 10 gusts 11 0.16 2.0 100.8 22 21
20 July 2026
23:00 S 10 gusts 12 0.17 2.2 100.9 23 22
22:00 S 11 gusts 13 0.08 1.8 100.9 23 22
21:00 SSE 6 gusts 7 0.06 2.2 100.9 23 22
20:00 SSW 5 gusts 7 0.12 2.1 101.0 24 22
19:00 SW 10 gusts 12 0.22 2.2 101.1 24 22
18:00 SW 14 gusts 18 0.30 2.3 101.1 24 22
17:00 SSW 12 gusts 15 0.23 2.0 101.2 24 23
16:00 SW 11 gusts 13 0.15 2.1 101.2 25 23
15:00 E 4 gusts 6 0.07 2.6 101.3 23 24
14:00 NE 3 gusts 3 0.09 2.6 101.4 22 24
13:00 NNE 3 gusts 4 0.15 4.3 101.4 21 23
12:00 E 3 gusts 5 0.10 2.7 101.4 21 22
11:00 N 3 gusts 4 0.12 2.2 101.5 20 21
10:00 NW 6 gusts 8 0.15 2.2 101.5 19 21
9:00 WNW 5 gusts 7 0.19 2.2 101.5 19 21

If you require additional historical weather information please visit Fisheries and Oceans Canada

Zoom-in to make a selection

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

Great Lakes - Lake Erie and Lake Ontario 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.

Features

Colour-coded weather alerts

Learn more about weather alerting in Canada

Thunderstorm Outlooks

Find the Thunderstorm Outlook for your area.

Feedbackabout this web site
Date modified: