Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

12.3°C

Measurement Time: Monday, June 8, 2026, 11:00 AM EDT

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

17.3°C
Partly cloudy
Partly cloudy
17.3°C
16.4°C
52%
W 18 kph
29.4 kph
16°C
9.1°C
0 mm
50%
24 km
1011 mbar
1

Five Day Weather Forecast

Patchy rain nearby
Sat
H: 23°C
L: 13°C
Patchy rain nearby
Sun
H: 20°C
L: 13°C
Sunny
Mon
H: 20°C
L: 13°C
Sunny
Tue
H: 20°C
L: 12°C
Patchy rain nearby
Wed
H: 20°C
L: 13°C

Air Quality

AQI: 1 - Good
PM2.5: 8.4 μg/m3
PM10: 8.7 μg/m3
Carbon Monoxide: 118 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 38 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:19 PM
Sunset: 9:02 PM
Daylight: 15 hrs 24 mins
Moonrise: 12:04 AM
Moon Transit: 6:34 PM
Moonset: 12:32 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
6:04 PM - 8:34 PM

Minor Periods

11:34 AM - 1:04 PM
12:02 AM - 1:32 AM

Action Rating: 3 out of 5

Small Craft Advisory issued June 20 at 3:43AM EDT until June 20 at 8:00AM EDT by NWS Buffalo NY

Effective: Sat June 20, 2026, 3:43 AM
Expires: Sat June 20, 2026, 8:00 AM

* WHAT...West winds 15 to 25 knots and waves 3 to 5 feet. * WHERE...The nearshore waters of Lake Ontario from the Niagara River to Hamlin Beach. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Winds and/or waves will cause hazardous conditions that could capsize or damage small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Beach Hazards Statement issued June 19 at 7:55PM EDT until June 20 at 8:00AM EDT by NWS Buffalo NY

Effective: Fri June 19, 2026, 7:55 PM
Expires: Sat June 20, 2026, 8:00 AM

* WHAT...Strong currents and dangerous swimming conditions. * WHERE...Beaches of Niagara and Orleans counties. * WHEN...Through Saturday morning. * IMPACTS...Strong currents and dangerous swimming conditions.

Stay out of the water to avoid dangerous swimming conditions.
Saturday, June 20, 2026

Weather Forecast

Patchy rain nearby
22.8°C
12.6°C
17.5°C
64%
0.76 mm
36%
0%
18.7 kph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 10.52 μg/m3
PM10: 10.86 μg/m3
Carbon Monoxide: 126 μg/m3
Nitrogen Dioxide: 10.74 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 52.96 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:19 PM
Sunset: 9:02 PM
Daylight: 15 hrs 24 mins
Moonrise: 12:04 AM
Moon Transit: 6:34 PM
Moonset: 12:32 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
6:04 PM - 8:34 PM

Minor Periods

11:34 AM - 1:04 PM
12:02 AM - 1:32 AM

Action Rating: 3 out of 5

Sunday, June 21, 2026

Weather Forecast

Patchy rain nearby
19.6°C
13.1°C
16.4°C
80%
0.96 mm
52%
0%
13 kph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 14.33 μg/m3
PM10: 14.73 μg/m3
Carbon Monoxide: 198.42 μg/m3
Nitrogen Dioxide: 19.62 μg/m3
Sulphur Dioxide: 3.63 μg/m3
Ozone: 44.88 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:20 PM
Sunset: 9:02 PM
Daylight: 15 hrs 24 mins
Moonrise: 1:13 PM
Moon Transit: 7:18 PM
Moonset: 12:52 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%

Best Times for Fishing or Hunting

Major Periods

7:52 AM - 10:22 AM
6:48 PM - 9:18 PM

Minor Periods

12:43 AM - 2:13 PM
12:22 AM - 1:52 AM

Action Rating: 3 out of 5

Monday, June 22, 2026

Weather Forecast

Sunny
20°C
13.3°C
16.3°C
73%
0 mm
7%
0%
14.4 kph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 14.65 μg/m3
PM10: 14.88 μg/m3
Carbon Monoxide: 284.58 μg/m3
Nitrogen Dioxide: 31.67 μg/m3
Sulphur Dioxide: 4.95 μg/m3
Ozone: 29.54 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:20 PM
Sunset: 9:02 PM
Daylight: 15 hrs 24 mins
Moonrise: 2:20 PM
Moon Transit: 8:00 PM
Moonset: 1:11 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%

Best Times for Fishing or Hunting

Major Periods

8:35 AM - 11:05 AM
7:30 PM - 10:00 PM

Minor Periods

1:50 PM - 3:20 PM
12:41 AM - 2:11 AM

Action Rating: 2 out of 5

Tuesday, June 23, 2026

Weather Forecast

Sunny
20.1°C
12.4°C
16.1°C
74%
0 mm
8%
0%
13.3 kph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 9 μg/m3
PM10: 9.13 μg/m3
Carbon Monoxide: 228.47 μg/m3
Nitrogen Dioxide: 21.33 μg/m3
Sulphur Dioxide: 4.96 μg/m3
Ozone: 46.13 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:20 PM
Sunset: 9:02 PM
Daylight: 15 hrs 24 mins
Moonrise: 3:25 PM
Moon Transit: 8:43 PM
Moonset: 1:30 AM
Moon Phase: First Quarter
Moon Illumination: 61.0%

Best Times for Fishing or Hunting

Major Periods

9:17 AM - 11:47 AM
8:13 PM - 10:43 PM

Minor Periods

2:55 PM - 4:25 PM
1:00 AM - 2:30 AM

Action Rating: 2 out of 5

Wednesday, June 24, 2026

Weather Forecast

Patchy rain nearby
19.9°C
12.9°C
15.9°C
73%
0.44 mm
36%
0%
13.7 kph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.14 μg/m3
PM10: 3.22 μg/m3
Carbon Monoxide: 168.22 μg/m3
Nitrogen Dioxide: 14.12 μg/m3
Sulphur Dioxide: 3.28 μg/m3
Ozone: 28.78 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:20 PM
Sunset: 9:02 PM
Daylight: 15 hrs 23 mins
Moonrise: 4:31 PM
Moon Transit: 9:27 PM
Moonset: 1:51 AM
Moon Phase: First Quarter
Moon Illumination: 71.7%

Best Times for Fishing or Hunting

Major Periods

10:01 AM - 12:31 AM
8:57 PM - 11:27 PM

Minor Periods

4:01 PM - 5:31 PM
1:21 AM - 2:51 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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