Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

6.0°C

Measurement Time: Wednesday, November 26, 2025, 11:00 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: 240 feet / 73 meters

Nearest Address:
Grimsby, ON
Niagara Regional District County

GPS Coordinates: 43.25, -79.53

Nearby Water Temperatures

Eighteenmile Creek, Burt, NY (41.2 mi)
Buffalo River, Buffalo, NY (41.3 mi)
Erie Canal, Lockport, NY (42.7 mi)
Oak Orchard Creek, Medina, NY (57.8 mi)
Oak Orchard Creek, Kenyonville, NY (61.4 mi)
Cattaraugus Creek, Gowanda, NY (62.2 mi)
Johnson Creek, Kuckville, NY (64.1 mi)
Oak Orchard Creek, Kent, NY (67.6 mi)
Sandy Creek, North Hamlin, NY (81.4 mi)
Allegheny River, Salamanca, NY (86.2 mi)
Walnut Creek, Erie, PA (88.8 mi)
Northrup Creek, North Greece, NY (90.0 mi)
Erie Canal, Rochester, NY (95.1 mi)
Genesee River, Rochester, NY (96.7 mi)
Allen Creek, Brighton, NY (101.2 mi)

Weather for Grimsby, Ontario

Current Weather

2.6°C
Clear
Conditions: Clear
Humidity: 62%
Feels Like: -4.7°C
Wind: WSW 32.2 mph
Wind Gusts: 46.9 mph
Pressure: 29.67 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 4°C
L: -1°C
Overcast
Fri
H: 3°C
L: -1°C
Partly Cloudy
Sat
H: 1°C
L: -2°C
Moderate rain
Sun
H: 3°C
L: -0°C
Partly Cloudy
Mon
H: -2°C
L: -4°C

Air Quality

PM2.5: 1.35 μg/m3
PM10: 1.35 μg/m3
Carbon Monoxide: 174.85 μg/m3
Nitrogen Dioxide: 4.15 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:05 AM
Sunset: 4:45 PM
Daylight: 9 hrs 19 mins
Moonrise: 12:49 AM
Moon Transit: 6:07 PM
Moonset: 11:36 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

6:40 AM - 9:10 AM
5:37 PM - 8:07 PM

Minor Periods

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

Action Rating: 2 out of 5

special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) 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 – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) 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: Wed November 26, 2025, 1:29 PM
Expires: Thu November 27, 2025, 5:29 AM

Strong winds continue. Lake effect snow expected Thursday night. What: Strong winds gusting 70 to 80 km/h. Reduced visibility in snow and local blowing snow. When: Strong winds ending Thursday night or Friday morning. Lake effect snow Thursday evening through Friday morning. Additional information: Strong southwest winds will shift to the west tonight and then to the northwest Thursday afternoon or evening. In addition, lake effect snow may move through the area Thursday night and possibly return Friday afternoon. Snowfall accumulations are not expected to be significant, but visibility may be reduced in snow and local blowing snow. Local utility outages are possible. High-sided vehicles will be pushed around by the wind. Loose objects may be tossed by the wind. If visibility is reduced while driving, turn on your lights and maintain a safe following distance. ### 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.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) 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 – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) 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: Wed November 26, 2025, 4:19 PM
Expires: Thu November 27, 2025, 8:19 AM

Strong winds continue. Lake effect snow expected Thursday night. What: Strong winds gusting 70 to 80 km/h. Reduced visibility in snow and local blowing snow. When: Strong winds ending Thursday night or Friday morning. Lake effect snow Thursday evening through Friday morning. Additional information: Strong southwest winds will shift to the west tonight and then to the northwest Thursday afternoon or evening. In addition, lake effect snow may move through the area Thursday night and possibly return Friday afternoon. Snowfall accumulations are not expected to be significant, but visibility may be reduced in snow and local blowing snow. Local utility outages are possible. High-sided vehicles will be pushed around by the wind. Loose objects may be tossed by the wind. If visibility is reduced while driving, turn on your lights and maintain a safe following distance. ### 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.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) 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 – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) 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: Wed November 26, 2025, 11:06 PM
Expires: Thu November 27, 2025, 6:04 AM

Locally heavy snow possible late this evening and early overnight. What: Local snowfall amounts of 5 cm or so. When: Ending overnight. Additional information: A band of lake effect snow and rain is affecting areas near the Lake Erie shoreline. Locally hazardous travel conditions are possible due to accumulating snow and poor visibility. The band is expected to shift south of the region later tonight. ### 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.


Thursday, November 27, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 1°C
Average Humidity: 72%
Chance of Rain: 60%
Wind: 34.2 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.64 μg/m3
PM10: 1.67 μg/m3
Carbon Monoxide: 178.61 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 67.84 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:05 AM
Sunset: 4:45 PM
Daylight: 9 hrs 19 mins
Moonrise: 12:49 AM
Moon Transit: 6:07 PM
Moonset: 11:36 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

6:40 AM - 9:10 AM
5:37 PM - 8:07 PM

Minor Periods

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

Action Rating: 2 out of 5

Friday, November 28, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 0.6°C
Average Humidity: 76%
Chance of Rain: 0%
Wind: 25.7 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.61 μg/m3
PM10: 1.68 μg/m3
Carbon Monoxide: 161.53 μg/m3
Nitrogen Dioxide: 4.46 μg/m3
Sulphur Dioxide: 2.02 μg/m3
Ozone: 77.84 μg/m3

Astronomical

Sunrise: 7:27 AM
Sun Transit: 12:06 AM
Sunset: 4:45 PM
Daylight: 9 hrs 18 mins
Moonrise: 1:09 PM
Moon Transit: 6:52 PM
Moonset: 12:36 AM
Moon Phase: First Quarter
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

7:26 AM - 9:56 AM
6:22 PM - 8:52 PM

Minor Periods

12:39 AM - 2:09 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Saturday, November 29, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: -0.4°C
Average Humidity: 71%
Chance of Rain: 0%
Wind: 19 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.41 μg/m3
PM10: 2.46 μg/m3
Carbon Monoxide: 183.41 μg/m3
Nitrogen Dioxide: 6.83 μg/m3
Sulphur Dioxide: 2.62 μg/m3
Ozone: 76.92 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:06 AM
Sunset: 4:45 PM
Daylight: 9 hrs 16 mins
Moonrise: 1:29 PM
Moon Transit: 9:12 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

8:11 AM - 10:41 AM
8:42 PM - 11:12 PM

Minor Periods

12:59 AM - 2:29 PM
12:18 AM - 1:48 AM

Action Rating: 2 out of 5

Sunday, November 30, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 1.2°C
Average Humidity: 88%
Chance of Rain: 83%
Wind: 30.9 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.83 μg/m3
PM10: 3.87 μg/m3
Carbon Monoxide: 232.7 μg/m3
Nitrogen Dioxide: 7.9 μg/m3
Sulphur Dioxide: 3.89 μg/m3
Ozone: 68.85 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:06 AM
Sunset: 4:44 PM
Daylight: 9 hrs 15 mins
Moonrise: 1:51 PM
Moon Transit: 8:26 PM
Moonset: 2:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:56 PM - 10:26 PM

Minor Periods

1:21 PM - 2:51 PM
1:30 AM - 3:00 AM

Action Rating: 2 out of 5

Monday, December 1, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: -2.1°C
Average Humidity: 77%
Chance of Rain: 0%
Wind: 20.4 mph
UV Index: 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: 7:31 AM
Sun Transit: 12:07 AM
Sunset: 4:44 PM
Daylight: 9 hrs 13 mins
Moonrise: 2:14 PM
Moon Transit: 9:17 PM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

9:48 AM - 12:18 AM
8:47 PM - 11:17 PM

Minor Periods

1:44 PM - 3:14 PM
2:47 AM - 4:17 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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