Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

12.7°C 54.9°F
Cold Thermal Gear Required
12.7°C
Frigid < 10°C
Cold 10°–15°
Cool 16°–21°
Comfortable 21°–27°
Warm 27°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Saturday, November 7, 2026, 3:00 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: 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

9.8°C
Light drizzle
Conditions: Light drizzle
Humidity: 82%
Feels Like: 6.6°C
Wind: WNW 13.4 mph
Wind Gusts: 20.3 mph
Pressure: 29.93 in
Precipitation: 0.01 in
Cloud Cover: 100%
Visibility: 1 mi
UV Index: 0.1

Weather Forecast

Sunny
Sat
H: 10°C
L: 5°C
Sunny
Sun
H: 13°C
L: 6°C
Overcast
Mon
H: 10°C
L: 8°C

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.5 μg/m³
Good
PM10
2.5 μg/m³
Good
Ozone (O3)
39 μg/m³
Photochemical
NO2
11.5 μg/m³
Nitrogen Dioxide
SO2
3.8 μg/m³
Sulfur Dioxide
CO
247 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 1m daylight
Sunrise 7:01 AM
Solar Noon 12:01 PM
Sunset 5:02 PM
Moon
Waning Crescent • 1%
Moonrise 5:23 AM
Transit 10:41 AM
Moonset 3:51 PM

Best Times for Fishing or Hunting

Major Periods

10:11 AM - 12:41 PM
10:34 PM - 1:04 AM

Minor Periods

4:53 AM - 6:23 AM
3:21 PM - 4:51 PM
Action Rating:
Good Action 3/5
Saturday, November 7, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 7.8°C
Average Humidity: 74%
Chance of Rain: 49%
Wind: 17.4 mph
UV Index: 2.1

Astronomical

Sun
10h 1m daylight
Sunrise 7:01 AM
Solar Noon 12:01 PM
Sunset 5:02 PM
Moon
Waning Crescent • 1%
Moonrise 5:23 AM
Transit 10:41 AM
Moonset 3:51 PM

Best Times for Fishing or Hunting

Major Periods

10:11 AM - 12:41 PM
10:34 PM - 1:04 AM

Minor Periods

4:53 AM - 6:23 AM
3:21 PM - 4:51 PM
Action Rating:
Good Action 3/5
Sunday, November 8, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 9.7°C
Average Humidity: 66%
Chance of Rain: 21%
Wind: 24.8 mph
UV Index: 2.1

Astronomical

Sun
9h 59m daylight
Sunrise 7:02 AM
Solar Noon 12:01 PM
Sunset 5:01 PM
Moon
New • 0%
Moonrise 6:32 AM
Transit 11:27 AM
Moonset 4:16 PM

Best Times for Fishing or Hunting

Major Periods

10:57 AM - 1:27 PM
11:21 PM - 1:51 AM

Minor Periods

6:02 AM - 7:32 AM
3:46 PM - 5:16 PM
Action Rating:
Peak Action 5/5
Monday, November 9, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 8.9°C
Average Humidity: 65%
Chance of Rain: 36%
Wind: 23 mph
UV Index: 1.4

Astronomical

Sun
9h 56m daylight
Sunrise 7:04 AM
Solar Noon 12:01 PM
Sunset 5:00 PM
Moon
New • 2%
Moonrise 7:39 AM
Transit 12:15 PM
Moonset 4:46 PM

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
11:45 AM - 2:15 PM

Minor Periods

7:09 AM - 8:39 AM
4:16 PM - 5:46 PM
Action Rating:
Very Good 4/5
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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