Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

9.6°C

Measurement Time: Wednesday, June 4, 2025, 7:00 PM EDT

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

18.8°C
Overcast
Conditions: Overcast
Humidity: 85%
Feels Like: 18.8°C
Wind: W 8.1 mph
Wind Gusts: 16.9 mph
Pressure: 29.99 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 5 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 27°C
L: 13°C
Patchy rain nearby
Thu
H: 18°C
L: 14°C
Partly Cloudy
Fri
H: 19°C
L: 13°C
Partly Cloudy
Sat
H: 21°C
L: 13°C
Sunny
Sun
H: 20°C
L: 11°C

Air Quality

AQI: 2 - Moderate
PM2.5: 37.56 μg/m3
PM10: 38.3 μg/m3
Carbon Monoxide: 475.45 μg/m3
Nitrogen Dioxide: 39.22 μg/m3
Sulphur Dioxide: 11.66 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:16 PM
Sunset: 8:54 PM
Daylight: 15 hrs 15 mins
Moonrise: 2:39 PM
Moon Transit: 8:41 PM
Moonset: 2:17 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%

Best Times for Fishing or Hunting

Major Periods

9:18 AM - 11:48 AM
8:11 PM - 10:41 PM

Minor Periods

2:09 PM - 3:39 PM
1:47 AM - 3:17 AM

Action Rating: 2 out of 5

avertissement de grains annulé

Service Notice – April 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 planned for deployment for later in 2025. Data changes will appear in CAP-CP upon 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 – avril 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 prévue d’être déployée plus tard en 2025. Des changements aux données apparaîtront dans le PC-PAC lors 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: Wed June 4, 2025, 7:23 PM
Expires: Wed June 4, 2025, 8:23 PM

Squalls have weakened or moved out of the area. ###


avertissement de grains en vigueur

Service Notice – April 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 planned for deployment for later in 2025. Data changes will appear in CAP-CP upon 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 – avril 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 prévue d’être déployée plus tard en 2025. Des changements aux données apparaîtront dans le PC-PAC lors 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: Wed June 4, 2025, 6:16 PM
Expires: Wed June 4, 2025, 9:15 PM

Squalls with wind gusts up to 35 knots are expected or occurring in the area. As of 6:15 p.m. EDT, a line of thunderstorms is located from Mississauga to North Burlington, moving east at 35 knots. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.


avertissement de grains en vigueur

Service Notice – April 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 planned for deployment for later in 2025. Data changes will appear in CAP-CP upon 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 – avril 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 prévue d’être déployée plus tard en 2025. Des changements aux données apparaîtront dans le PC-PAC lors 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: Wed June 4, 2025, 6:16 PM
Expires: Wed June 4, 2025, 9:15 PM

Squalls with wind gusts up to 35 knots are expected or occurring in the area. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.


avertissement de grains annulé

Service Notice – April 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 planned for deployment for later in 2025. Data changes will appear in CAP-CP upon 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 – avril 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 prévue d’être déployée plus tard en 2025. Des changements aux données apparaîtront dans le PC-PAC lors 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: Wed June 4, 2025, 7:23 PM
Expires: Wed June 4, 2025, 8:23 PM

Squalls have weakened or moved out of the area. ###


avertissement de grains en vigueur

Service Notice – April 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 planned for deployment for later in 2025. Data changes will appear in CAP-CP upon 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 – avril 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 prévue d’être déployée plus tard en 2025. Des changements aux données apparaîtront dans le PC-PAC lors 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: Wed June 4, 2025, 6:16 PM
Expires: Wed June 4, 2025, 9:15 PM

Squalls with wind gusts up to 35 knots are expected or occurring in the area. As of 6:15 p.m. EDT, a line of thunderstorms is located from Mississauga to North Burlington, moving east at 35 knots. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.


Wednesday, June 4, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 19.9°C
Average Humidity: 77%
Chance of Rain: 80%
Wind: 16.8 mph
UV Index: 2.2

Air Quality

AQI: 2 - Moderate
PM2.5: 36.13 μg/m3
PM10: 36.98 μg/m3
Carbon Monoxide: 476.93 μg/m3
Nitrogen Dioxide: 20.64 μg/m3
Sulphur Dioxide: 16.01 μg/m3
Ozone: 121.52 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:16 PM
Sunset: 8:54 PM
Daylight: 15 hrs 15 mins
Moonrise: 2:39 PM
Moon Transit: 8:41 PM
Moonset: 2:17 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%

Best Times for Fishing or Hunting

Major Periods

9:18 AM - 11:48 AM
8:11 PM - 10:41 PM

Minor Periods

2:09 PM - 3:39 PM
1:47 AM - 3:17 AM

Action Rating: 2 out of 5

Thursday, June 5, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 16.2°C
Average Humidity: 89%
Chance of Rain: 62%
Wind: 6.5 mph
UV Index: 0.7

Air Quality

AQI: 2 - Moderate
PM2.5: 30.17 μg/m3
PM10: 30.69 μg/m3
Carbon Monoxide: 538.5 μg/m3
Nitrogen Dioxide: 45.67 μg/m3
Sulphur Dioxide: 14.81 μg/m3
Ozone: 81.48 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:16 PM
Sunset: 8:55 PM
Daylight: 15 hrs 16 mins
Moonrise: 3:41 PM
Moon Transit: 9:21 PM
Moonset: 2:34 AM
Moon Phase: First Quarter
Moon Illumination: 70.6%

Best Times for Fishing or Hunting

Major Periods

9:57 AM - 12:27 AM
8:51 PM - 11:21 PM

Minor Periods

3:11 PM - 4:41 PM
2:04 AM - 3:34 AM

Action Rating: 3 out of 5

Friday, June 6, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 16.7°C
Average Humidity: 70%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 1.5

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 53.86 μg/m3
PM10: 54.38 μg/m3
Carbon Monoxide: 531.54 μg/m3
Nitrogen Dioxide: 82.63 μg/m3
Sulphur Dioxide: 24.58 μg/m3
Ozone: 59.28 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:16 PM
Sunset: 8:56 PM
Daylight: 15 hrs 17 mins
Moonrise: 4:44 PM
Moon Transit: 10:01 PM
Moonset: 2:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

4:14 PM - 5:44 PM
2:21 AM - 3:51 AM

Action Rating: 2 out of 5

Saturday, June 7, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 17.5°C
Average Humidity: 64%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 1.6

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 45.46 μg/m3
PM10: 46.53 μg/m3
Carbon Monoxide: 500.76 μg/m3
Nitrogen Dioxide: 51.09 μg/m3
Sulphur Dioxide: 15.21 μg/m3
Ozone: 78.48 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:17 PM
Sunset: 8:56 PM
Daylight: 15 hrs 18 mins
Moonrise: 5:48 PM
Moon Transit: 10:44 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:18 PM - 6:48 PM
2:40 AM - 4:10 AM

Action Rating: 2 out of 5

Sunday, June 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 15.4°C
Average Humidity: 74%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 1.8

Air Quality

AQI: 2 - Moderate
PM2.5: 31.52 μg/m3
PM10: 32.2 μg/m3
Carbon Monoxide: 472.89 μg/m3
Nitrogen Dioxide: 35.62 μg/m3
Sulphur Dioxide: 11.1 μg/m3
Ozone: 63.77 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:17 PM
Sunset: 8:57 PM
Daylight: 15 hrs 19 mins
Moonrise: 6:53 PM
Moon Transit: 11:29 PM
Moonset: 3:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

12:03 AM - 2:33 PM
12:00 AM - 12:00 AM

Minor Periods

6:23 PM - 7:53 PM
3:03 AM - 4:33 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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