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

8.4°C
Fog
Fog
6°C
6.1°C
83%
NE 14.4 kph
20.6 kph
3.7°C
6.1°C
0 mm
0%
10 km
1022 mbar
4.3

Five Day Weather Forecast

Fog
Sun
H: 11°C
L: 4°C
Sunny
Mon
H: 13°C
L: 5°C
Patchy rain nearby
Tue
H: 14°C
L: 11°C
Heavy rain
Wed
H: 8°C
L: 5°C
Patchy rain nearby
Thu
H: 9°C
L: 3°C

Air Quality

AQI: 1 - Good
PM2.5: 15.05 μg/m3
PM10: 15.55 μg/m3
Carbon Monoxide: 333.85 μg/m3
Nitrogen Dioxide: 13.05 μg/m3
Sulphur Dioxide: 5.35 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:15 PM
Sunset: 8:14 PM
Daylight: 13 hrs 56 mins
Moonrise: 3:16 PM
Moon Transit: 9:56 PM
Moonset: 4:03 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

10:30 AM - 1:00 PM
9:26 PM - 11:56 PM

Minor Periods

2:46 PM - 4:16 PM
3:33 AM - 5:03 AM

Action Rating: 2 out of 5

yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite 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: Sun April 26, 2026, 12:58 AM
Expires: Sun April 26, 2026, 10:00 AM

Near zero visibility in fog is expected. Locally dense fog has developed which will persist into early Sunday morning before dissipating. ### 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.


yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite 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: Sun April 26, 2026, 12:44 AM
Expires: Sun April 26, 2026, 9:59 AM

Near zero visibility in fog is expected. Locally dense fog has develop that will persist into early Sunday morning before dissipating. ### 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.


yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite 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: Sun April 26, 2026, 12:44 AM
Expires: Sun April 26, 2026, 9:59 AM

Near zero visibility in fog is expected. ### 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.


yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite 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: Sun April 26, 2026, 7:08 AM
Expires: Sun April 26, 2026, 10:59 AM

Near zero visibility in fog is expected. Locally dense fog will dissipate this morning. ### 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.


yellow advisory - fog - in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite 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: Sun April 26, 2026, 7:08 AM
Expires: Sun April 26, 2026, 10:59 AM

Near zero visibility in fog is expected. ### 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.


Sunday, April 26, 2026

Weather Forecast

Fog
10.9°C
3.6°C
6.4°C
94%
0 mm
0%
0%
20.2 kph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 12.6 μg/m3
PM10: 13.02 μg/m3
Carbon Monoxide: 314.25 μg/m3
Nitrogen Dioxide: 17.29 μg/m3
Sulphur Dioxide: 4.62 μg/m3
Ozone: 65.12 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:15 PM
Sunset: 8:14 PM
Daylight: 13 hrs 56 mins
Moonrise: 3:16 PM
Moon Transit: 9:56 PM
Moonset: 4:03 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

10:30 AM - 1:00 PM
9:26 PM - 11:56 PM

Minor Periods

2:46 PM - 4:16 PM
3:33 AM - 5:03 AM

Action Rating: 2 out of 5

Monday, April 27, 2026

Weather Forecast

Sunny
13.3°C
4.6°C
10°C
76%
0 mm
0%
0%
24.1 kph
6.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.83 μg/m3
PM10: 19.8 μg/m3
Carbon Monoxide: 369.49 μg/m3
Nitrogen Dioxide: 24.03 μg/m3
Sulphur Dioxide: 5.75 μg/m3
Ozone: 66.68 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 1:15 PM
Sunset: 8:15 PM
Daylight: 13 hrs 58 mins
Moonrise: 4:24 PM
Moon Transit: 10:38 PM
Moonset: 4:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

11:13 AM - 1:43 PM
12:00 AM - 12:00 AM

Minor Periods

3:54 PM - 5:24 PM
3:53 AM - 5:23 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Patchy rain nearby
14°C
10.6°C
12.2°C
78%
4.14 mm
81%
0%
40.3 kph
4.9


Air Quality

AQI: 1 - Good
PM2.5: 8.6 μg/m3
PM10: 8.99 μg/m3
Carbon Monoxide: 198.49 μg/m3
Nitrogen Dioxide: 9.31 μg/m3
Sulphur Dioxide: 3.79 μg/m3
Ozone: 96.08 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:15 PM
Sunset: 8:17 PM
Daylight: 14 hrs 1 mins
Moonrise: 5:29 PM
Moon Transit: 11:20 PM
Moonset: 4:42 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

11:55 AM - 2:25 PM
12:00 AM - 12:00 AM

Minor Periods

4:59 PM - 6:29 PM
4:12 AM - 5:42 AM

Action Rating: 2 out of 5

Wednesday, April 29, 2026

Weather Forecast

Heavy rain
8°C
5.2°C
7.2°C
91%
21.39 mm
85%
0%
28.8 kph
3.5


Air Quality

AQI: 1 - Good
PM2.5: 11.13 μg/m3
PM10: 11.22 μg/m3
Carbon Monoxide: 301.76 μg/m3
Nitrogen Dioxide: 31.46 μg/m3
Sulphur Dioxide: 9.03 μg/m3
Ozone: 43.68 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:15 PM
Sunset: 8:18 PM
Daylight: 14 hrs 3 mins
Moonrise: 6:36 PM
Moon Transit: 12:00 AM
Moonset: 5:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:37 AM - 3:07 PM

Minor Periods

6:06 PM - 7:36 PM
4:30 AM - 6:00 AM

Action Rating: 3 out of 5

Thursday, April 30, 2026

Weather Forecast

Patchy rain nearby
9.1°C
3.3°C
6.5°C
74%
0.45 mm
88%
0%
22.3 kph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.69 μg/m3
PM10: 2.82 μg/m3
Carbon Monoxide: 180.53 μg/m3
Nitrogen Dioxide: 9.55 μg/m3
Sulphur Dioxide: 3.36 μg/m3
Ozone: 67.85 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:15 PM
Sunset: 8:19 PM
Daylight: 14 hrs 6 mins
Moonrise: 7:41 PM
Moon Transit: 12:02 AM
Moonset: 5:20 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:20 PM - 3:50 PM

Minor Periods

7:11 PM - 8:41 PM
4:50 AM - 6:20 AM

Action Rating: 5 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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