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

12.8°C
Clear
Clear
11.1°C
13.4°C
54%
E 18.4 kph
32.9 kph
12.2°C
5.4°C
0 mm
0%
10 km
1025 mbar
0

Five Day Weather Forecast

Heavy rain
Sat
H: 14°C
L: 9°C
Patchy rain nearby
Sun
H: 16°C
L: 9°C
Partly Cloudy
Mon
H: 18°C
L: 12°C
Patchy rain nearby
Tue
H: 20°C
L: 14°C
Patchy rain nearby
Wed
H: 18°C
L: 12°C

Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 6.75 μg/m3
Carbon Monoxide: 181.85 μg/m3
Nitrogen Dioxide: 10.05 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:14 PM
Sunset: 8:44 PM
Daylight: 14 hrs 57 mins
Moonrise: 1:07 PM
Moon Transit: 7:54 PM
Moonset: 2:08 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:28 AM - 10:58 AM
7:24 PM - 9:54 PM

Minor Periods

12:37 AM - 2:07 PM
1:38 AM - 3:08 AM

Action Rating: 2 out of 5

special weather statement in effect

Service Notice – April 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – avril 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Fri May 22, 2026, 9:15 PM
Expires: Sat May 23, 2026, 1:15 PM

Heavy rain is expected. What: Rainfall amounts of 30 to 50 mm possible. When: Overnight through Saturday evening. Additional information: A low pressure system is expected to track across the area beginning tonight bringing heavy rain. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/floods for the latest details. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.


Saturday, May 23, 2026

Weather Forecast

Heavy rain
13.8°C
8.7°C
11.9°C
79%
41.54 mm
92%
0%
31.7 kph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.74 μg/m3
PM10: 4.87 μg/m3
Carbon Monoxide: 196.45 μg/m3
Nitrogen Dioxide: 9.58 μg/m3
Sulphur Dioxide: 2.14 μg/m3
Ozone: 66.28 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:14 PM
Sunset: 8:44 PM
Daylight: 14 hrs 57 mins
Moonrise: 1:07 PM
Moon Transit: 7:54 PM
Moonset: 2:08 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:28 AM - 10:58 AM
7:24 PM - 9:54 PM

Minor Periods

12:37 AM - 2:07 PM
1:38 AM - 3:08 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
15.5°C
9.3°C
12.7°C
92%
3.72 mm
90%
0%
24.5 kph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 6.31 μg/m3
PM10: 6.31 μg/m3
Carbon Monoxide: 156.73 μg/m3
Nitrogen Dioxide: 10.55 μg/m3
Sulphur Dioxide: 2.92 μg/m3
Ozone: 59.16 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:15 PM
Sunset: 8:45 PM
Daylight: 14 hrs 59 mins
Moonrise: 2:16 PM
Moon Transit: 8:38 PM
Moonset: 2:29 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

9:13 AM - 11:43 AM
8:08 PM - 10:38 PM

Minor Periods

1:46 PM - 3:16 PM
1:59 AM - 3:29 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Partly Cloudy
17.8°C
12.2°C
15.1°C
86%
0.06 mm
0%
0%
11.5 kph
7.8


Air Quality

AQI: 2 - Moderate
PM2.5: 19.14 μg/m3
PM10: 19.21 μg/m3
Carbon Monoxide: 299.69 μg/m3
Nitrogen Dioxide: 31.27 μg/m3
Sulphur Dioxide: 6.49 μg/m3
Ozone: 46.08 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:15 PM
Sunset: 8:46 PM
Daylight: 15 hrs 1 mins
Moonrise: 3:22 PM
Moon Transit: 9:20 PM
Moonset: 2:48 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

9:55 AM - 12:25 AM
8:50 PM - 11:20 PM

Minor Periods

2:52 PM - 4:22 PM
2:18 AM - 3:48 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Patchy rain nearby
20.2°C
13.6°C
16.8°C
82%
1.81 mm
82%
0%
19.4 kph
8


Air Quality

AQI: 2 - Moderate
PM2.5: 18.18 μg/m3
PM10: 18.4 μg/m3
Carbon Monoxide: 213.4 μg/m3
Nitrogen Dioxide: 23.88 μg/m3
Sulphur Dioxide: 3.68 μg/m3
Ozone: 53.24 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:15 PM
Sunset: 8:47 PM
Daylight: 15 hrs 2 mins
Moonrise: 4:28 PM
Moon Transit: 10:01 PM
Moonset: 3:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

10:37 AM - 1:07 PM
12:00 AM - 12:00 AM

Minor Periods

3:58 PM - 5:28 PM
2:36 AM - 4:06 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
18.3°C
12°C
15°C
85%
0.44 mm
80%
0%
20.9 kph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 11.87 μg/m3
PM10: 12.21 μg/m3
Carbon Monoxide: 232.6 μg/m3
Nitrogen Dioxide: 19.32 μg/m3
Sulphur Dioxide: 4.6 μg/m3
Ozone: 58.31 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:15 PM
Sunset: 8:48 PM
Daylight: 15 hrs 4 mins
Moonrise: 5:33 PM
Moon Transit: 10:44 PM
Moonset: 3:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

11:19 AM - 1:49 PM
12:00 AM - 12:00 AM

Minor Periods

5:03 PM - 6:33 PM
2:55 AM - 4:25 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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