Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

6.4°C

Measurement Time: Saturday, May 10, 2025, 3:00 AM EDT

Temperature Locations

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Local Points of Interest

Hamilton, ON; Toronto, ON

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Lake Ontario

Station Name: West Lake Ontario - Grimsby
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 240 feet / 73 meters

Nearest Address:
Grimsby, ON
Niagara Regional District County

GPS Coordinates: 43.25, -79.53

Nearby Water Temperatures

Eighteenmile Creek, Burt, NY (41.2 mi)
Buffalo River, Buffalo, NY (41.3 mi)
Erie Canal, Lockport, NY (42.7 mi)
Oak Orchard Creek, Medina, NY (57.8 mi)
Oak Orchard Creek, Kenyonville, NY (61.4 mi)
Cattaraugus Creek, Gowanda, NY (62.2 mi)
Johnson Creek, Kuckville, NY (64.1 mi)
Oak Orchard Creek, Kent, NY (67.6 mi)
Sandy Creek, North Hamlin, NY (81.4 mi)
Allegheny River, Salamanca, NY (86.2 mi)
Walnut Creek, Erie, PA (88.8 mi)
Northrup Creek, North Greece, NY (90.0 mi)
Erie Canal, Rochester, NY (95.1 mi)
Genesee River, Rochester, NY (96.7 mi)
Allen Creek, Brighton, NY (101.2 mi)

Weather for Grimsby, Ontario

Current Weather

6.2°C
Clear
Conditions: Clear
Humidity: 67%
Feels Like: 4.5°C
Wind: W 5.1 mph
Wind Gusts: 10.8 mph
Pressure: 30.08 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Sat
H: 20°C
L: 2°C
Sunny
Sun
H: 12°C
L: 6°C
Sunny
Mon
H: 17°C
L: 6°C
Patchy rain nearby
Tue
H: 14°C
L: 10°C
Patchy rain nearby
Wed
H: 20°C
L: 11°C

Air Quality

PM2.5: 13.32 μg/m3
PM10: 14.06 μg/m3
Carbon Monoxide: 375.55 μg/m3
Nitrogen Dioxide: 26.46 μg/m3
Sulphur Dioxide: 9.99 μg/m3
Ozone: 54 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:14 PM
Sunset: 8:31 PM
Daylight: 14 hrs 31 mins
Moonrise: 6:53 PM
Moon Transit: 12:00 AM
Moonset: 4:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:39 AM - 3:09 PM

Minor Periods

6:23 PM - 7:53 PM
4:16 AM - 5:46 AM

Action Rating: 3 out of 5

Frost Advisory issued May 9 at 10:43PM EDT until May 10 at 8:00AM EDT by NWS Buffalo NY

Effective: Fri May 9, 2025, 10:43 PM
Expires: Sat May 10, 2025, 8:00 AM

* WHAT...Temperatures in the mid 30s will result in areas of frost formation. * WHERE...Well inland from Lake Erie for Chautauqua and Southern Erie Counties, in addition to all of Wyoming County. * WHEN...From 2 AM to 8 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left unprotected.

Take steps now to protect tender plants from the cold.
Saturday, May 10, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 11°C
Average Humidity: 66%
Chance of Rain: 0%
Wind: 11.4 mph
UV Index: 1.7

Air Quality

AQI: 2 - Moderate
PM2.5: 17.46 μg/m3
PM10: 18.34 μg/m3
Carbon Monoxide: 391.39 μg/m3
Nitrogen Dioxide: 35.19 μg/m3
Sulphur Dioxide: 10.02 μg/m3
Ozone: 64.52 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:14 PM
Sunset: 8:31 PM
Daylight: 14 hrs 31 mins
Moonrise: 6:53 PM
Moon Transit: 12:00 AM
Moonset: 4:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:39 AM - 3:09 PM

Minor Periods

6:23 PM - 7:53 PM
4:16 AM - 5:46 AM

Action Rating: 3 out of 5

Sunday, May 11, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 8.2°C
Average Humidity: 60%
Chance of Rain: 0%
Wind: 11.4 mph
UV Index: 2.1

Air Quality

AQI: 1 - Good
PM2.5: 13.52 μg/m3
PM10: 14.3 μg/m3
Carbon Monoxide: 379.4 μg/m3
Nitrogen Dioxide: 31.52 μg/m3
Sulphur Dioxide: 14.02 μg/m3
Ozone: 68.24 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:14 PM
Sunset: 8:32 PM
Daylight: 14 hrs 33 mins
Moonrise: 7:57 PM
Moon Transit: 12:03 AM
Moonset: 5:06 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:21 PM - 3:51 PM

Minor Periods

7:27 PM - 8:57 PM
4:36 AM - 6:06 AM

Action Rating: 5 out of 5

Monday, May 12, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 10.9°C
Average Humidity: 70%
Chance of Rain: 0%
Wind: 5.8 mph
UV Index: 2.1

Air Quality

AQI: 2 - Moderate
PM2.5: 38.26 μg/m3
PM10: 39.47 μg/m3
Carbon Monoxide: 660.67 μg/m3
Nitrogen Dioxide: 76.85 μg/m3
Sulphur Dioxide: 25.32 μg/m3
Ozone: 62.16 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:14 PM
Sunset: 8:33 PM
Daylight: 14 hrs 36 mins
Moonrise: 9:03 PM
Moon Transit: 12:47 AM
Moonset: 5:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:17 AM - 2:47 AM
2:06 PM - 4:36 PM

Minor Periods

8:33 PM - 10:03 PM
4:59 AM - 6:29 AM

Action Rating: 4 out of 5

Tuesday, May 13, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 11.8°C
Average Humidity: 91%
Chance of Rain: 89%
Wind: 6.3 mph
UV Index: 1.3

Air Quality

AQI: 4 - Unhealthy
PM2.5: 67.74 μg/m3
PM10: 68.05 μg/m3
Carbon Monoxide: 779.56 μg/m3
Nitrogen Dioxide: 111.93 μg/m3
Sulphur Dioxide: 24.56 μg/m3
Ozone: 24.31 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:14 PM
Sunset: 8:34 PM
Daylight: 14 hrs 38 mins
Moonrise: 10:08 PM
Moon Transit: 1:33 AM
Moonset: 5:58 AM
Moon Phase: Full
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:03 AM - 3:33 AM
2:54 PM - 5:24 PM

Minor Periods

9:38 PM - 11:08 PM
5:28 AM - 6:58 AM

Action Rating: 4 out of 5

Wednesday, May 14, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 13.7°C
Average Humidity: 92%
Chance of Rain: 88%
Wind: 5.8 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:14 PM
Sunset: 8:35 PM
Daylight: 14 hrs 40 mins
Moonrise: 11:09 PM
Moon Transit: 2:23 AM
Moonset: 6:35 AM
Moon Phase: Full
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

1:53 AM - 4:23 AM
3:46 PM - 6:16 PM

Minor Periods

12:00 AM - 12:00 AM
6:05 AM - 7:35 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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