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

-9°C
Light freezing rain
Light freezing rain
-17.6°C
-9°C
68%
WSW 25.9 kph
39.3 kph
-17.2°C
-12.8°C
0.02 mm
0%
10 km
1013 mbar
0

Five Day Weather Forecast

Light freezing rain
Tue
H: -9°C
L: -16°C
Partly Cloudy
Wed
H: -10°C
L: -18°C
Cloudy
Thu
H: -11°C
L: -15°C
Sunny
Fri
H: -12°C
L: -18°C
Light snow
Sat
H: -10°C
L: -17°C

Air Quality

AQI: 1 - Good
PM2.5: 4.65 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 201.85 μg/m3
Nitrogen Dioxide: 6.85 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 7:38 AM
Sun Transit: 12:30 AM
Sunset: 5:23 PM
Daylight: 9 hrs 45 mins
Moonrise: 11:45 AM
Moon Transit: 7:45 PM
Moonset: 2:39 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

8:12 AM - 10:42 AM
7:15 PM - 9:45 PM

Minor Periods

11:15 AM - 12:45 AM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

yellow warning - cold - 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: Tue January 27, 2026, 12:18 AM
Expires: Tue January 27, 2026, 2:06 PM

A period of very cold wind chills is expected. What: Wind chill values of minus 25 to minus 30. Brisk winds gusting up to 50 km/h. When: Continuing through this morning. Additional information: Wind chill values will moderate through the day, but are still expected to be minus 15 to minus 20. ### Extreme cold puts everyone at risk. Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter. Watch for cold related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes. 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. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.

Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill. Keep emergency supplies in your vehicle such as extra blankets and jumper cables. Outdoor workers should take regularly scheduled breaks to warm up.


yellow warning - cold - 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: Tue January 27, 2026, 4:55 AM
Expires: Tue January 27, 2026, 2:02 PM

A period of very cold wind chills is expected. What: Wind chill values of minus 25 to minus 30. Brisk winds gusting up to 50 km/h. When: This morning. Additional information: Wind chill values will moderate through the day, although are expected to remain near minus 20. ### Extreme cold puts everyone at risk. Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter. Watch for cold related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes. 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. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.

Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill. Keep emergency supplies in your vehicle such as extra blankets and jumper cables. Outdoor workers should take regularly scheduled breaks to warm up.


yellow warning - cold - ended

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: Tue January 27, 2026, 12:59 PM
Expires: Tue January 27, 2026, 1:59 PM

Extreme cold conditions are no longer expected. ###


yellow warning - cold - 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: Tue January 27, 2026, 12:01 PM
Expires: Tue January 27, 2026, 2:59 PM

A period of very cold wind chills is expected. What: Wind chill values of minus 25 to minus 30. Brisk winds gusting up to 50 km/h. When: This morning. Additional information: Wind chill values will moderate through the day, although are expected to remain near minus 20. ### Extreme cold puts everyone at risk. Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter. Watch for cold related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes. 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. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.

Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill. Keep emergency supplies in your vehicle such as extra blankets and jumper cables. Outdoor workers should take regularly scheduled breaks to warm up.


yellow warning - cold - 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: Tue January 27, 2026, 12:01 PM
Expires: Tue January 27, 2026, 2:59 PM

A period of very cold wind chills is expected. ### Extreme cold puts everyone at risk. Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter. Watch for cold related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes. 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. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.

Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill. Keep emergency supplies in your vehicle such as extra blankets and jumper cables. Outdoor workers should take regularly scheduled breaks to warm up.


Tuesday, January 27, 2026

Weather Forecast

Light freezing rain
-8.8°C
-15.8°C
-12.4°C
73%
0.33 mm
81%
33%
39.2 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 8.23 μg/m3
PM10: 8.42 μg/m3
Carbon Monoxide: 228.89 μg/m3
Nitrogen Dioxide: 8.17 μg/m3
Sulphur Dioxide: 2.63 μg/m3
Ozone: 68.16 μg/m3

Astronomical

Sunrise: 7:38 AM
Sun Transit: 12:30 AM
Sunset: 5:23 PM
Daylight: 9 hrs 45 mins
Moonrise: 11:45 AM
Moon Transit: 7:45 PM
Moonset: 2:39 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

8:12 AM - 10:42 AM
7:15 PM - 9:45 PM

Minor Periods

11:15 AM - 12:45 AM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Partly Cloudy
-10.1°C
-18.2°C
-13.2°C
77%
0 mm
0%
0%
33.8 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 5.45 μg/m3
Carbon Monoxide: 221.85 μg/m3
Nitrogen Dioxide: 7.75 μg/m3
Sulphur Dioxide: 2.53 μg/m3
Ozone: 66.88 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 12:31 AM
Sunset: 5:25 PM
Daylight: 9 hrs 47 mins
Moonrise: 12:31 AM
Moon Transit: 8:47 PM
Moonset: 3:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:13 AM - 11:43 AM
8:17 PM - 10:47 PM

Minor Periods

12:01 AM - 1:31 PM
3:27 AM - 4:57 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Cloudy
-10.5°C
-15.2°C
-12.2°C
78%
0 mm
0%
0%
25.6 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 5.35 μg/m3
Carbon Monoxide: 265.37 μg/m3
Nitrogen Dioxide: 10.6 μg/m3
Sulphur Dioxide: 3.37 μg/m3
Ozone: 62.96 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 12:31 AM
Sunset: 5:26 PM
Daylight: 9 hrs 50 mins
Moonrise: 1:29 PM
Moon Transit: 9:52 PM
Moonset: 5:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:17 AM - 12:47 AM
9:22 PM - 11:52 PM

Minor Periods

12:59 AM - 2:29 PM
4:40 AM - 6:10 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
-11.5°C
-18.4°C
-15°C
77%
0 mm
0%
0%
18 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.95 μg/m3
PM10: 5.14 μg/m3
Carbon Monoxide: 276.09 μg/m3
Nitrogen Dioxide: 10.9 μg/m3
Sulphur Dioxide: 3.42 μg/m3
Ozone: 60.16 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:31 AM
Sunset: 5:27 PM
Daylight: 9 hrs 52 mins
Moonrise: 2:41 PM
Moon Transit: 10:56 PM
Moonset: 6:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:22 AM - 1:52 PM
12:00 AM - 12:00 AM

Minor Periods

2:11 PM - 3:41 PM
5:42 AM - 7:12 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Light snow
-10°C
-16.9°C
-13.1°C
86%
0.67 mm
70%
46%
23.8 kph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 3.93 μg/m3
PM10: 4.1 μg/m3
Carbon Monoxide: 221.64 μg/m3
Nitrogen Dioxide: 11.68 μg/m3
Sulphur Dioxide: 3.53 μg/m3
Ozone: 61.08 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:31 AM
Sunset: 5:29 PM
Daylight: 9 hrs 54 mins
Moonrise: 4:00 PM
Moon Transit: 11:56 PM
Moonset: 7:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:23 AM - 2:53 PM
12:00 AM - 12:00 AM

Minor Periods

3:30 PM - 5:00 PM
6:30 AM - 8:00 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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