Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

-0.9°C

Measurement Time: Friday, December 5, 2025, 1:00 PM EST

Temperature Locations

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Local Points of Interest

Hamilton, ON; Toronto, ON

Lake Ontario

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

Elevation Above Sea Level: 73 meters

Nearest Address:
Grimsby, ON
Niagara Regional District County

GPS Coordinates: 43.25, -79.53

Nearby Water Temperatures

Eighteenmile Creek, Burt, NY (66.3 km)
Buffalo River, Buffalo, NY (66.4 km)
Erie Canal, Lockport, NY (68.7 km)
Oak Orchard Creek, Medina, NY (93.1 km)
Oak Orchard Creek, Kenyonville, NY (98.9 km)
Cattaraugus Creek, Gowanda, NY (100.0 km)
Johnson Creek, Kuckville, NY (103.1 km)
Oak Orchard Creek, Kent, NY (108.8 km)
Sandy Creek, North Hamlin, NY (131.1 km)
Allegheny River, Salamanca, NY (138.7 km)
Walnut Creek, Erie, PA (142.9 km)
Northrup Creek, North Greece, NY (144.8 km)
Erie Canal, Rochester, NY (153.0 km)
Genesee River, Rochester, NY (155.6 km)
Allen Creek, Brighton, NY (162.9 km)

Weather for Grimsby, Ontario

Current Weather

4.5°C
Clear
Clear
1.6°C
3.1°C
86%
WNW 12.2 kph
20.9 kph
0.7°C
0°C
0 mm
0%
10 km
1009 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 11°C
L: 3°C
Patchy rain nearby
Fri
H: 7°C
L: 2°C
Patchy rain nearby
Sat
H: 8°C
L: 1°C
Partly Cloudy
Sun
H: 10°C
L: 1°C
Patchy rain nearby
Mon
H: 13°C
L: 7°C

Air Quality

AQI: 1 - Good
PM2.5: 7.85 μg/m3
PM10: 9.65 μg/m3
Carbon Monoxide: 231.85 μg/m3
Nitrogen Dioxide: 13.25 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 53 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:15 PM
Sunset: 8:19 PM
Daylight: 14 hrs 6 mins
Moonrise: 7:41 PM
Moon Transit: 12:02 AM
Moonset: 5:20 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:20 PM - 3:50 PM

Minor Periods

7:11 PM - 8:41 PM
4:50 AM - 6:20 AM

Action Rating: 5 out of 5

Frost Advisory issued April 30 at 1:32AM EDT until May 1 at 9:00AM EDT by NWS Buffalo NY

Effective: Thu April 30, 2026, 1:32 AM
Expires: Thu April 30, 2026, 4:15 PM

* WHAT...Temperatures in the lower to mid 30s will result in frost formation. * WHERE...Erie, Niagara, Orleans, Monroe, Wayne, Genesee, Wyoming, Livingston, Ontario, and Chautauqua Counties. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left unprotected. * ADDITIONAL DETAILS...The coldest temperatures and greater risk of frost will be inland away from the lakeshores.

Take steps now to protect tender plants from the cold.
Thursday, April 30, 2026

Weather Forecast

Patchy rain nearby
10.9°C
2.5°C
6.3°C
70%
0.33 mm
86%
0%
26.3 kph
2.6


Air Quality

AQI: 1 - Good
PM2.5: 8.56 μg/m3
PM10: 9.67 μg/m3
Carbon Monoxide: 224.77 μg/m3
Nitrogen Dioxide: 14.93 μg/m3
Sulphur Dioxide: 5.12 μg/m3
Ozone: 64.08 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:15 PM
Sunset: 8:19 PM
Daylight: 14 hrs 6 mins
Moonrise: 7:41 PM
Moon Transit: 12:02 AM
Moonset: 5:20 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:20 PM - 3:50 PM

Minor Periods

7:11 PM - 8:41 PM
4:50 AM - 6:20 AM

Action Rating: 5 out of 5

Friday, May 1, 2026

Weather Forecast

Patchy rain nearby
7.4°C
1.7°C
4.7°C
69%
2.09 mm
85%
0%
20.5 kph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 12.27 μg/m3
PM10: 12.55 μg/m3
Carbon Monoxide: 241.29 μg/m3
Nitrogen Dioxide: 27.07 μg/m3
Sulphur Dioxide: 7.42 μg/m3
Ozone: 44.44 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:15 PM
Sunset: 8:20 PM
Daylight: 14 hrs 9 mins
Moonrise: 8:48 PM
Moon Transit: 12:46 AM
Moonset: 5:42 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
2:05 PM - 4:35 PM

Minor Periods

8:18 PM - 9:48 PM
5:12 AM - 6:42 AM

Action Rating: 4 out of 5

Saturday, May 2, 2026

Weather Forecast

Patchy rain nearby
7.6°C
0.9°C
4.4°C
66%
0.66 mm
87%
0%
19.1 kph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 6.91 μg/m3
PM10: 7.19 μg/m3
Carbon Monoxide: 188.09 μg/m3
Nitrogen Dioxide: 16.38 μg/m3
Sulphur Dioxide: 4.8 μg/m3
Ozone: 55.8 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:15 PM
Sunset: 8:21 PM
Daylight: 14 hrs 11 mins
Moonrise: 9:53 PM
Moon Transit: 1:31 AM
Moonset: 6:09 AM
Moon Phase: Full
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
2:51 PM - 5:21 PM

Minor Periods

9:23 PM - 10:53 PM
5:39 AM - 7:09 AM

Action Rating: 3 out of 5

Sunday, May 3, 2026

Weather Forecast

Partly Cloudy
10.4°C
1.2°C
6°C
63%
0.03 mm
0%
0%
25.9 kph
5.7


Air Quality

AQI: 1 - Good
PM2.5: 9.32 μg/m3
PM10: 10.47 μg/m3
Carbon Monoxide: 189.86 μg/m3
Nitrogen Dioxide: 16.98 μg/m3
Sulphur Dioxide: 4.24 μg/m3
Ozone: 60.36 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 14 mins
Moonrise: 10:56 PM
Moon Transit: 2:19 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
3:40 PM - 6:10 PM

Minor Periods

10:26 PM - 11:56 PM
6:11 AM - 7:41 AM

Action Rating: 4 out of 5

Monday, May 4, 2026

Weather Forecast

Patchy rain nearby
13.3°C
7.2°C
8.7°C
81%
1.49 mm
88%
0%
40.7 kph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 7.76 μg/m3
PM10: 8.59 μg/m3
Carbon Monoxide: 186.1 μg/m3
Nitrogen Dioxide: 7.74 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 86.38 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:14 PM
Sunset: 8:24 PM
Daylight: 14 hrs 16 mins
Moonrise: 11:53 PM
Moon Transit: 3:09 AM
Moonset: 7:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
4:31 PM - 7:01 PM

Minor Periods

12:00 AM - 12:00 AM
6:50 AM - 8:20 AM

Action Rating: 2 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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