Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

4.2°C

Measurement Time: Monday, December 1, 2025, 11:00 PM EST

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

-1.6°C
Moderate snow
Conditions: Moderate snow
Humidity: 65%
Feels Like: -6.1°C
Wind: ESE 8.5 mph
Wind Gusts: 12.2 mph
Pressure: 30.01 in
Precipitation: 0.06 in
Cloud Cover: 0%
Visibility: 1 mi
UV Index: 0

Five Day Weather Forecast

Heavy snow
Tue
H: 1°C
L: -2°C
Light freezing rain
Wed
H: 2°C
L: -5°C
Blowing snow
Thu
H: -0°C
L: -7°C
Partly Cloudy
Fri
H: -3°C
L: -7°C
Patchy moderate snow
Sat
H: 0°C
L: -1°C

Air Quality

PM2.5: 7.75 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 615.85 μg/m3
Nitrogen Dioxide: 16.85 μg/m3
Sulphur Dioxide: 6.65 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 12:07 AM
Sunset: 4:44 PM
Daylight: 9 hrs 12 mins
Moonrise: 2:43 PM
Moon Transit: 10:14 PM
Moonset: 4:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

10:42 AM - 1:12 PM
12:00 AM - 12:00 AM

Minor Periods

2:13 PM - 3:43 PM
4:08 AM - 5:38 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued December 1 at 12:42PM EST until December 2 at 7:00PM EST by NWS Buffalo NY

Effective: Mon December 1, 2025, 12:42 PM
Expires: Tue December 2, 2025, 1:30 AM

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches. The snow will peak in intensity during the Tuesday morning commute. * WHERE...Niagara, Orleans, Monroe, Northern Erie, and Genesee Counties. * WHEN...From 1 AM to 7 PM EST Tuesday. * IMPACTS...Plan on snow covered and slippery road conditions with reduced visibility. The hazardous conditions will impact the Tuesday morning commute.

Periods of snow will result in snow covered roads and limited visibilities. Slow down and use caution while driving. Submit snow reports through our website or social media.


Winter Weather Advisory issued December 2 at 1:05AM EST until December 2 at 7:00PM EST by NWS Buffalo NY

Effective: Tue December 2, 2025, 1:05 AM
Expires: Tue December 2, 2025, 3:00 PM

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches. The snow will peak in intensity during the Tuesday morning commute. * WHERE...Niagara, Orleans, Monroe, Northern Erie, and Genesee Counties. * WHEN...Until 7 PM EST this evening. * IMPACTS...Plan on snow covered and slippery road conditions with reduced visibility. The hazardous conditions will impact the Tuesday morning commute.

Periods of snow will result in snow covered roads and limited visibilities. Slow down and use caution while driving. Submit snow reports through our website or social media.
Tuesday, December 2, 2025

Weather Forecast

Conditions: Heavy snow
Average Temperature: -0.9°C
Average Humidity: 90%
Chance of Rain: 61%
Wind: 10.1 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 7.54 μg/m3
PM10: 7.65 μg/m3
Carbon Monoxide: 432.97 μg/m3
Nitrogen Dioxide: 17.81 μg/m3
Sulphur Dioxide: 7.21 μg/m3
Ozone: 60 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 12:07 AM
Sunset: 4:44 PM
Daylight: 9 hrs 12 mins
Moonrise: 2:43 PM
Moon Transit: 10:14 PM
Moonset: 4:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

10:42 AM - 1:12 PM
12:00 AM - 12:00 AM

Minor Periods

2:13 PM - 3:43 PM
4:08 AM - 5:38 AM

Action Rating: 2 out of 5

Wednesday, December 3, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: -1.1°C
Average Humidity: 87%
Chance of Rain: 80%
Wind: 25.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 7.04 μg/m3
PM10: 7.11 μg/m3
Carbon Monoxide: 218.33 μg/m3
Nitrogen Dioxide: 13.54 μg/m3
Sulphur Dioxide: 3.79 μg/m3
Ozone: 63.6 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:08 AM
Sunset: 4:43 PM
Daylight: 9 hrs 11 mins
Moonrise: 3:18 PM
Moon Transit: 11:15 PM
Moonset: 6:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

11:41 AM - 2:11 PM
12:00 AM - 12:00 AM

Minor Periods

2:48 PM - 4:18 PM
5:32 AM - 7:02 AM

Action Rating: 3 out of 5

Thursday, December 4, 2025

Weather Forecast

Conditions: Blowing snow
Average Temperature: -2.8°C
Average Humidity: 77%
Chance of Rain: 64%
Wind: 24.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 4.57 μg/m3
Carbon Monoxide: 193.05 μg/m3
Nitrogen Dioxide: 7.14 μg/m3
Sulphur Dioxide: 3.1 μg/m3
Ozone: 71.4 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:08 AM
Sunset: 4:43 PM
Daylight: 9 hrs 9 mins
Moonrise: 4:06 PM
Moon Transit: 12:00 AM
Moonset: 7:26 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:46 AM - 3:16 PM

Minor Periods

3:36 PM - 5:06 PM
6:56 AM - 8:26 AM

Action Rating: 4 out of 5

Friday, December 5, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: -5.3°C
Average Humidity: 76%
Chance of Rain: 0%
Wind: 13.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 3.41 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 196.23 μg/m3
Nitrogen Dioxide: 8.51 μg/m3
Sulphur Dioxide: 2.7 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 7:35 AM
Sun Transit: 12:08 AM
Sunset: 4:43 PM
Daylight: 9 hrs 8 mins
Moonrise: 5:06 PM
Moon Transit: 12:22 AM
Moonset: 8:45 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:53 PM - 4:23 PM

Minor Periods

4:36 PM - 6:06 PM
8:15 AM - 9:45 AM

Action Rating: 5 out of 5

Saturday, December 6, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: -0.3°C
Average Humidity: 91%
Chance of Rain: 68%
Wind: 6.5 mph
UV Index: 1

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: 7:36 AM
Sun Transit: 12:09 AM
Sunset: 4:43 PM
Daylight: 9 hrs 7 mins
Moonrise: 6:20 PM
Moon Transit: 1:29 AM
Moonset: 9:49 AM
Moon Phase: Full
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

12:59 AM - 3:29 AM
3:00 PM - 5:30 PM

Minor Periods

5:50 PM - 7:20 PM
9:19 AM - 10:49 AM

Action Rating: 3 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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