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

2.9°C
Mist
Mist
-0.4°C
1.8°C
86%
SSW 12.6 kph
21.3 kph
0.7°C
1.4°C
0 mm
0%
10 km
1020 mbar
0

Five Day Weather Forecast

Cloudy
Thu
H: 9°C
L: 1°C
Moderate rain
Fri
H: 10°C
L: 2°C
Heavy rain
Sat
H: 2°C
L: 1°C
Blowing snow
Sun
H: 2°C
L: -3°C
Partly Cloudy
Mon
H: 1°C
L: -4°C

Air Quality

AQI: 1 - Good
PM2.5: 9.65 μg/m3
PM10: 9.75 μg/m3
Carbon Monoxide: 300.85 μg/m3
Nitrogen Dioxide: 10.65 μg/m3
Sulphur Dioxide: 4.55 μg/m3
Ozone: 41 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:24 AM
Sunset: 5:00 PM
Daylight: 9 hrs 11 mins
Moonrise: 11:19 PM
Moon Transit: 4:36 AM
Moonset: 10:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
5:53 PM - 8:23 PM

Minor Periods

12:00 AM - 12:00 AM
10:18 AM - 11:48 AM

Action Rating: 2 out of 5

yellow advisory - fog - 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 January 7, 2026, 8:58 PM
Expires: Thu January 8, 2026, 12:05 PM

Areas of dense fog are expected. What: Near zero visibility in areas of dense fog. When: Tonight into Thursday morning. Additional Information: Areas of dense fog have already developed for some areas. The fog is expected to become more widespread tonight into early Thursday morning. Visibility is expected to improve through Thursday morning. ### Travel will likely be hazardous in some locations. Visibility will likely be suddenly reduced at times. 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.

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.


yellow advisory - fog - 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: Thu January 8, 2026, 1:13 AM
Expires: Thu January 8, 2026, 11:59 AM

Areas of dense fog are expected. What: Near zero visibility in areas of dense fog. When: Tonight into Thursday morning. Additional Information: Areas of dense fog have lifted for the time being. Fog is expected to become more widespread late tonight or early Thursday morning. Visibility is expected improve through Thursday morning. ### Travel will likely be hazardous in some locations. Visibility will likely be suddenly reduced at times. 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.

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.


yellow advisory - fog - 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: Thu January 8, 2026, 1:13 AM
Expires: Thu January 8, 2026, 11:59 AM

### Travel will likely be hazardous in some locations. Visibility will likely be suddenly reduced at times. 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.

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.


yellow advisory - fog - 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: Thu January 8, 2026, 4:29 AM
Expires: Thu January 8, 2026, 5:29 AM

Poor visibility in fog is no longer expected. ###


Thursday, January 8, 2026

Weather Forecast

Cloudy
9.2°C
1.2°C
3.7°C
94%
0.07 mm
0%
0%
18.4 kph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 11.05 μg/m3
PM10: 11.13 μg/m3
Carbon Monoxide: 275.73 μg/m3
Nitrogen Dioxide: 19.83 μg/m3
Sulphur Dioxide: 4.95 μg/m3
Ozone: 26.56 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:24 AM
Sunset: 5:00 PM
Daylight: 9 hrs 11 mins
Moonrise: 11:19 PM
Moon Transit: 4:36 AM
Moonset: 10:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
5:53 PM - 8:23 PM

Minor Periods

12:00 AM - 12:00 AM
10:18 AM - 11:48 AM

Action Rating: 2 out of 5

Friday, January 9, 2026

Weather Forecast

Moderate rain
10°C
2.3°C
6.5°C
97%
11.99 mm
87%
0%
43.6 kph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 7.88 μg/m3
PM10: 8 μg/m3
Carbon Monoxide: 209.49 μg/m3
Nitrogen Dioxide: 11.26 μg/m3
Sulphur Dioxide: 6.87 μg/m3
Ozone: 56.2 μg/m3

Astronomical

Sunrise: 7:49 AM
Sun Transit: 12:25 AM
Sunset: 5:01 PM
Daylight: 9 hrs 12 mins
Moonrise: 12:19 AM
Moon Transit: 5:18 AM
Moonset: 11:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
6:35 PM - 9:05 PM

Minor Periods

10:36 AM - 12:06 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, January 10, 2026

Weather Forecast

Heavy rain
1.6°C
0.7°C
2.4°C
97%
24.59 mm
79%
10%
39.2 kph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 3.93 μg/m3
PM10: 4.01 μg/m3
Carbon Monoxide: 329.93 μg/m3
Nitrogen Dioxide: 12.85 μg/m3
Sulphur Dioxide: 3.85 μg/m3
Ozone: 40.88 μg/m3

Astronomical

Sunrise: 7:49 AM
Sun Transit: 12:25 AM
Sunset: 5:02 PM
Daylight: 9 hrs 13 mins
Moonrise: 12:24 AM
Moon Transit: 6:00 AM
Moonset: 11:25 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
7:16 PM - 9:46 PM

Minor Periods

10:55 AM - 12:25 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, January 11, 2026

Weather Forecast

Blowing snow
2°C
-3.4°C
0.6°C
77%
0.89 mm
87%
39%
48.2 kph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 3.06 μg/m3
PM10: 3.14 μg/m3
Carbon Monoxide: 216.39 μg/m3
Nitrogen Dioxide: 8.68 μg/m3
Sulphur Dioxide: 3.15 μg/m3
Ozone: 53.56 μg/m3

Astronomical

Sunrise: 7:49 AM
Sun Transit: 12:26 AM
Sunset: 5:04 PM
Daylight: 9 hrs 15 mins
Moonrise: 1:28 AM
Moon Transit: 6:41 AM
Moonset: 11:45 AM
Moon Phase: Last Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

6:11 AM - 8:41 AM
7:59 PM - 10:29 PM

Minor Periods

11:15 AM - 12:45 AM
12:58 AM - 2:28 AM

Action Rating: 2 out of 5

Monday, January 12, 2026

Weather Forecast

Partly Cloudy
1°C
-3.7°C
-1.9°C
67%
0.02 mm
0%
6%
32 kph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.67 μg/m3
PM10: 1.7 μg/m3
Carbon Monoxide: 172.7 μg/m3
Nitrogen Dioxide: 4.44 μg/m3
Sulphur Dioxide: 2.17 μg/m3
Ozone: 70.46 μg/m3

Astronomical

Sunrise: 7:48 AM
Sun Transit: 12:26 AM
Sunset: 5:05 PM
Daylight: 9 hrs 16 mins
Moonrise: 2:33 AM
Moon Transit: 7:24 AM
Moonset: 12:09 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
8:43 PM - 11:13 PM

Minor Periods

11:39 AM - 1:09 PM
2:03 AM - 3:33 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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