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Eastern Lake Ontario: Past 24 Hour Conditions

Warnings

 

Grenadier Island

04:00 AM EDT 21 June 2025
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) Conditions Visibility(km) Pressure(kPa) Air temp(°C) Relative humidity(%) Dew point(°C) Humidex
21 June 2025
4:00 WSW 1 N/A N/A 101.7 15 97 14 *
3:00 WSW 2 N/A N/A 101.7 15 96 14 *
2:00 calm N/A N/A 101.6 15 95 15 *
1:00 calm N/A N/A 101.6 16 94 15 *
0:00 SW 1 N/A N/A 101.5 16 90 15 *
20 June 2025
23:00 S 2 N/A N/A 101.5 17 85 15 *
22:00 WSW 1 N/A N/A 101.4 18 84 15 *
21:00 WSW 3 N/A N/A 101.4 19 78 15 *
20:00 SW 1 N/A N/A 101.3 20 73 15 *
19:00 SW 3 N/A N/A 101.3 21 67 15 25
18:00 SSW 2 N/A N/A 101.2 22 66 16 27
17:00 SSW 4 N/A N/A 101.2 22 63 15 26
16:00 S 4 N/A N/A 101.2 22 64 15 26
15:00 SSW 2 N/A N/A 101.2 21 68 15 25
14:00 SW 4 N/A N/A 101.1 23 59 14 26
13:00 WSW 3 N/A N/A 101.1 23 53 13 25
12:00 W 2 N/A N/A 101.1 22 59 14 25
11:00 SSW 1 N/A N/A 101.1 21 69 15 25
10:00 W 4 N/A N/A 101.1 19 71 14 *
9:00 W 2 N/A N/A 101.0 18 79 14 *
8:00 W 2 N/A N/A 100.9 16 91 14 *
7:00 WSW 3 N/A N/A 100.9 16 93 14 *
6:00 WSW 4 N/A N/A 100.7 15 93 14 *
5:00 SSE 2 N/A N/A 100.6 15 93 14 *
4:00 NW 3 N/A N/A 100.4 15 92 14 *

If you require additional historical weather information, please visit Climate Data Online

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