Water Temperature of Lake Ontario in Grimsby, Ontario

Current Water Temperature

10.7°C

Measurement Time: Sunday, November 9, 2025, 7:00 AM 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

3.8°C
Patchy rain nearby
Conditions: Patchy rain nearby
Humidity: 93%
Feels Like: -1.3°C
Wind: ENE 17.2 mph
Wind Gusts: 24.1 mph
Pressure: 29.84 in
Precipitation: 0.01 in
Cloud Cover: 0%
Visibility: 1 mi
UV Index: 0

Five Day Weather Forecast

Moderate rain
Sun
H: 3°C
L: -0°C
Moderate or heavy snow showers
Mon
H: 0°C
L: -5°C
Patchy moderate snow
Tue
H: 3°C
L: -5°C
Moderate rain
Wed
H: 5°C
L: 2°C
Patchy rain nearby
Thu
H: 4°C
L: 3°C

Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 228.85 μg/m3
Nitrogen Dioxide: 13.65 μg/m3
Sulphur Dioxide: 4.85 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:02 AM
Sunset: 5:00 PM
Daylight: 9 hrs 56 mins
Moonrise: 8:45 PM
Moon Transit: 3:51 AM
Moonset: 12:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
5:19 PM - 7:49 PM

Minor Periods

8:15 PM - 9:45 PM
11:35 AM - 1:05 PM

Action Rating: 3 out of 5

special weather statement in effect

Service Notice – October 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) a new Coastal Flooding Statement has been created and could be issued for the same locations as the Coastal Flooding Warning, 3) more adjustments to the locations used for the coastal flooding alerts, 4) new Public locations around Regina, Moose Jaw and Saskatoon in Saskatchewan, 5) 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 6) 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 – octobre 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) un nouveau bulletin de submersion côtière a été créé et pourra être émis pour les mêmes emplacements que l’avertissement de submersion côtière, 3) d’autres ajustements aux emplacements utilisés pour les alertes d’inondation côtière, 4) de nouveaux emplacements publics autour de Regina, Moose Jaw et Saskatoon, en Saskatchewan, 5) 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 6) 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: Sun November 9, 2025, 5:22 AM
Expires: Sun November 9, 2025, 9:22 PM

Accumulating snow likely today. What: Snowfall amounts of 5 to 10 cm. Amounts may be lesser near the shore of Lake Ontario. When: This morning through this evening. Additional information: Precipitation may begin as rain for locations near the shore of Lake Ontario and the Niagara Peninsula before changing to snow. Higher snowfall amounts may be possible over the higher terrain of the Niagara Escarpment. There remains uncertainty with respect to the track of this weather system, and as such forecast snowfall amounts may change. Motorists should expect difficult winter driving conditions and adjust travel plans accordingly. Poor weather conditions may contribute to transportation delays. ### 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 – October 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) a new Coastal Flooding Statement has been created and could be issued for the same locations as the Coastal Flooding Warning, 3) more adjustments to the locations used for the coastal flooding alerts, 4) new Public locations around Regina, Moose Jaw and Saskatoon in Saskatchewan, 5) 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 6) 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 – octobre 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) un nouveau bulletin de submersion côtière a été créé et pourra être émis pour les mêmes emplacements que l’avertissement de submersion côtière, 3) d’autres ajustements aux emplacements utilisés pour les alertes d’inondation côtière, 4) de nouveaux emplacements publics autour de Regina, Moose Jaw et Saskatoon, en Saskatchewan, 5) 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 6) 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: Sun November 9, 2025, 1:51 AM
Expires: Sun November 9, 2025, 5:51 PM

Accumulating snow likely today. What: Snowfall amounts of 5 to 10 cm. Amounts may be lesser near the shores of Lake Erie and Lake Ontario. When: This morning through this evening. Additional information: Precipitation may begin as rain before changing to snow for areas adjacent to Lake Erie and Lake Ontario. For these areas, snowfall amounts may be lesser. There remains uncertainty with respect to the track of this weather system, and as such forecast snowfall amounts may change. Motorists should expect difficult winter driving conditions and adjust travel plans accordingly. Poor weather conditions may contribute to transportation delays. ### 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 – October 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) a new Coastal Flooding Statement has been created and could be issued for the same locations as the Coastal Flooding Warning, 3) more adjustments to the locations used for the coastal flooding alerts, 4) new Public locations around Regina, Moose Jaw and Saskatoon in Saskatchewan, 5) 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 6) 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 – octobre 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) un nouveau bulletin de submersion côtière a été créé et pourra être émis pour les mêmes emplacements que l’avertissement de submersion côtière, 3) d’autres ajustements aux emplacements utilisés pour les alertes d’inondation côtière, 4) de nouveaux emplacements publics autour de Regina, Moose Jaw et Saskatoon, en Saskatchewan, 5) 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 6) 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: Sat November 8, 2025, 3:57 PM
Expires: Sun November 9, 2025, 7:57 AM

Accumulating snow likely on Sunday. What: Snowfall amounts of 2 to 10 cm. When: Beginning Sunday morning and continuing through Sunday evening. Additional information: A low pressure system will bring snowfall to parts of southern Ontario on Sunday. Precipitation may begin as rain before changing to snow Sunday afternoon for the Niagara Peninsula. Confidence remains low with respect to the strength and track of this weather system, and as such the areas affected and snowfall amounts may change. Motorists should expect difficult winter driving conditions and adjust travel plans accordingly. Poor weather conditions may contribute to transportation delays. ### 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.


Sunday, November 9, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 2°C
Average Humidity: 86%
Chance of Rain: 89%
Wind: 23.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.15 μg/m3
PM10: 4.27 μg/m3
Carbon Monoxide: 292.85 μg/m3
Nitrogen Dioxide: 13.48 μg/m3
Sulphur Dioxide: 4.97 μg/m3
Ozone: 55.96 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:02 AM
Sunset: 5:00 PM
Daylight: 9 hrs 56 mins
Moonrise: 8:45 PM
Moon Transit: 3:51 AM
Moonset: 12:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
5:19 PM - 7:49 PM

Minor Periods

8:15 PM - 9:45 PM
11:35 AM - 1:05 PM

Action Rating: 3 out of 5

Monday, November 10, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: -1.9°C
Average Humidity: 77%
Chance of Rain: 81%
Wind: 12.5 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 3.01 μg/m3
PM10: 3.54 μg/m3
Carbon Monoxide: 198.37 μg/m3
Nitrogen Dioxide: 7.5 μg/m3
Sulphur Dioxide: 3.59 μg/m3
Ozone: 67.68 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:02 AM
Sunset: 4:59 PM
Daylight: 9 hrs 53 mins
Moonrise: 10:01 PM
Moon Transit: 4:52 AM
Moonset: 12:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
6:17 PM - 8:47 PM

Minor Periods

9:31 PM - 11:01 PM
12:17 AM - 1:47 PM

Action Rating: 3 out of 5

Tuesday, November 11, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: -0.8°C
Average Humidity: 85%
Chance of Rain: 75%
Wind: 19.5 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.7 μg/m3
PM10: 3.11 μg/m3
Carbon Monoxide: 183.53 μg/m3
Nitrogen Dioxide: 6.21 μg/m3
Sulphur Dioxide: 2.54 μg/m3
Ozone: 67.24 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:02 AM
Sunset: 4:58 PM
Daylight: 9 hrs 51 mins
Moonrise: 11:15 PM
Moon Transit: 5:47 AM
Moonset: 1:18 PM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
7:09 PM - 9:39 PM

Minor Periods

12:00 AM - 12:00 AM
12:48 AM - 2:18 PM

Action Rating: 2 out of 5

Wednesday, November 12, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 3.8°C
Average Humidity: 91%
Chance of Rain: 76%
Wind: 19.9 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 8.63 μg/m3
PM10: 8.76 μg/m3
Carbon Monoxide: 179.17 μg/m3
Nitrogen Dioxide: 11.22 μg/m3
Sulphur Dioxide: 3.85 μg/m3
Ozone: 45.68 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:02 AM
Sunset: 4:57 PM
Daylight: 9 hrs 49 mins
Moonrise: 12:15 AM
Moon Transit: 6:36 AM
Moonset: 1:43 PM
Moon Phase: Last Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

6:06 AM - 8:36 AM
7:55 PM - 10:25 PM

Minor Periods

1:13 PM - 2:43 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, November 13, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 3.6°C
Average Humidity: 83%
Chance of Rain: 89%
Wind: 22.8 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.72 μg/m3
PM10: 2.74 μg/m3
Carbon Monoxide: 167.16 μg/m3
Nitrogen Dioxide: 7.23 μg/m3
Sulphur Dioxide: 2.43 μg/m3
Ozone: 57.38 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:02 AM
Sunset: 4:56 PM
Daylight: 9 hrs 47 mins
Moonrise: 12:26 AM
Moon Transit: 7:21 AM
Moonset: 2:04 PM
Moon Phase: Last Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
8:38 PM - 11:08 PM

Minor Periods

1:34 PM - 3:04 PM
12:00 AM - 12:00 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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