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Cornwall to Montréal: Past 24 Hour Conditions

Warnings

 

Grimsby - 45139

11:00 AM EDT 12 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)
12 July 2026
11:00 NNE 5 gusts 6 0.08 3.4 102.4 22 23
10:00 NNE 2 gusts 3 0.09 3.6 102.3 22 23
9:00 ENE 1 gusts 2 0.10 2.7 102.3 23 22
8:00 SE 1 gusts 1 0.12 2.7 102.3 24 22
7:00 ESE 3 gusts 5 0.13 3.6 102.2 22 22
6:00 SE 3 gusts 4 0.16 3.8 102.2 21 22
5:00 ENE 6 gusts 8 0.17 2.3 102.1 22 22
4:00 NE 7 gusts 8 0.18 2.3 102.1 22 22
3:00 NE 6 gusts 8 0.21 4.3 102.1 22 22
2:00 NE 7 gusts 8 0.22 2.4 102.1 23 22
1:00 NE 10 gusts 12 0.22 3.1 102.0 23 22
0:00 NNE 6 gusts 8 0.22 3.8 102.0 23 22
11 July 2026
23:00 NNE 5 gusts 6 0.25 3.8 102.0 23 22
22:00 NNE 5 gusts 6 0.30 3.3 101.9 23 22
21:00 NE 4 gusts 5 0.33 3.7 101.9 23 22
20:00 ENE 6 gusts 8 0.41 4.2 101.8 24 22
19:00 ENE 8 gusts 9 0.43 4.1 101.8 23 22
18:00 ENE 10 gusts 12 0.46 3.8 101.7 23 22
17:00 ENE 10 gusts 12 0.49 3.9 101.8 23 22
16:00 ENE 10 gusts 11 0.48 3.9 101.8 23 22
15:00 ENE 11 gusts 12 0.46 3.0 101.8 22 22
14:00 ENE 10 gusts 12 0.43 3.3 101.8 22 22
13:00 NE 10 gusts 12 0.41 3.4 101.8 22 22
12:00 NE 10 gusts 12 0.34 3.4 101.8 22 22
11:00 NNE 8 gusts 10 0.32 3.3 101.8 22 22

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

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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
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