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

1.2°C
Mist
Mist
-3.8°C
1.1°C
99%
E 20.2 kph
36.2 kph
-1.3°C
0.7°C
0 mm
0%
10 km
1009 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 6°C
L: 1°C
Moderate or heavy snow showers
Sat
H: 2°C
L: -1°C
Overcast
Sun
H: 0°C
L: -2°C
Moderate or heavy snow showers
Mon
H: -0°C
L: -4°C
Light freezing rain
Tue
H: -3°C
L: -10°C

Air Quality

PM2.5: 4.65 μg/m3
PM10: 4.75 μg/m3
Carbon Monoxide: 360.85 μg/m3
Nitrogen Dioxide: 14.75 μg/m3
Sulphur Dioxide: 3.55 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:31 AM
Sunset: 5:56 PM
Daylight: 10 hrs 47 mins
Moonrise: 8:25 AM
Moon Transit: 3:01 PM
Moonset: 9:53 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
2:31 PM - 5:01 PM

Minor Periods

9:23 PM - 10:53 PM
7:55 AM - 9:25 AM

Action Rating: 2 out of 5

yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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: Thu February 19, 2026, 8:38 PM
Expires: Fri February 20, 2026, 10:36 AM

Dense fog is expected. What: Near zero visibility in dense fog. When: This evening through overnight into early Friday morning. Additional information: Fog patches have developed in some locales and are expected to become dense with poor visibility. ### Travel will likely be hazardous in some locations. 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.

Be prepared for areas of near-zero visibility and allow extra time to reach your destination. If driving, turn on your lights, slow down and maintain a safe following distance.


special weather statement in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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: Thu February 19, 2026, 4:17 PM
Expires: Fri February 20, 2026, 8:17 AM

Strong winds expected Friday afternoon. What: Strong southwest winds gusting to 80 km/h. When: Friday afternoon. Additional information: Strong winds will develop as a cold front passes Friday afternoon. Winds will diminish Friday evening. Local utility outages are possible. Secure loose objects. ### 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.


Friday, February 20, 2026

Weather Forecast

Patchy rain nearby
6°C
0.7°C
2.8°C
93%
3.99 mm
83%
0%
42.1 kph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 7.57 μg/m3
PM10: 7.69 μg/m3
Carbon Monoxide: 322.05 μg/m3
Nitrogen Dioxide: 16.83 μg/m3
Sulphur Dioxide: 3.53 μg/m3
Ozone: 52.6 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:31 AM
Sunset: 5:56 PM
Daylight: 10 hrs 47 mins
Moonrise: 8:25 AM
Moon Transit: 3:01 PM
Moonset: 9:53 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
2:31 PM - 5:01 PM

Minor Periods

9:23 PM - 10:53 PM
7:55 AM - 9:25 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Moderate or heavy snow showers
1.5°C
-1.4°C
0.2°C
95%
12.43 mm
65%
29%
25.6 kph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 5.64 μg/m3
PM10: 5.73 μg/m3
Carbon Monoxide: 294.13 μg/m3
Nitrogen Dioxide: 17.46 μg/m3
Sulphur Dioxide: 4.83 μg/m3
Ozone: 52.52 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:31 AM
Sunset: 5:57 PM
Daylight: 10 hrs 50 mins
Moonrise: 8:48 AM
Moon Transit: 3:50 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
3:20 PM - 5:50 PM

Minor Periods

12:00 AM - 12:00 AM
8:18 AM - 9:48 AM

Action Rating: 4 out of 5

Sunday, February 22, 2026

Weather Forecast

Overcast
0°C
-2.1°C
-1.2°C
93%
0 mm
0%
0%
18.7 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 316.19 μg/m3
Nitrogen Dioxide: 17.31 μg/m3
Sulphur Dioxide: 4.72 μg/m3
Ozone: 55.44 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:31 AM
Sunset: 5:58 PM
Daylight: 10 hrs 53 mins
Moonrise: 9:13 AM
Moon Transit: 4:43 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
4:13 PM - 6:43 PM

Minor Periods

8:43 AM - 10:13 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, February 23, 2026

Weather Forecast

Moderate or heavy snow showers
-0°C
-4.3°C
-1.2°C
94%
3.72 mm
69%
55%
32 kph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.06 μg/m3
PM10: 8.3 μg/m3
Carbon Monoxide: 271.58 μg/m3
Nitrogen Dioxide: 21.95 μg/m3
Sulphur Dioxide: 4.73 μg/m3
Ozone: 51.46 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:31 AM
Sunset: 6:00 PM
Daylight: 10 hrs 56 mins
Moonrise: 9:46 AM
Moon Transit: 5:39 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

6:07 AM - 8:37 AM
5:09 PM - 7:39 PM

Minor Periods

9:16 AM - 10:46 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, February 24, 2026

Weather Forecast

Light freezing rain
-3.4°C
-9.7°C
-7.3°C
81%
0.27 mm
70%
17%
27.7 kph
0


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: 7:02 AM
Sun Transit: 12:31 AM
Sunset: 6:01 PM
Daylight: 10 hrs 59 mins
Moonrise: 10:27 AM
Moon Transit: 6:39 PM
Moonset: 1:46 AM
Moon Phase: First Quarter
Moon Illumination: 51.1%

Best Times for Fishing or Hunting

Major Periods

7:06 AM - 9:36 AM
6:09 PM - 8:39 PM

Minor Periods

9:57 AM - 11:27 AM
1:16 AM - 2:46 AM

Action Rating: 4 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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