Water Temperature of Lake Ontario in Grimsby, Ontario
Current Water Temperature
Measurement Time: Friday, December 5, 2025, 1:00 PM EST
Temperature Locations
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Local Points of Interest
Hamilton, ON; Toronto, ONStation 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

Five Day Weather Forecast

Thu
H: 11°C
L: 3°C

Fri
H: 8°C
L: 2°C

Sat
H: 8°C
L: 2°C

Sun
H: 10°C
L: 1°C

Mon
H: 12°C
L: 7°C
Air Quality
Nitrogen Dioxide: 34.85 μg/m3
Sulphur Dioxide: 7.45 μg/m3
Ozone: 24 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:19 PM
Daylight: 14 hrs 6 mins
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 AM1:20 PM - 3:50 PM
Minor Periods
7:11 PM - 8:41 PM4:50 AM - 6:20 AM
Action Rating: 5 out of 5
yellow advisory - frost - 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: Thu April 30, 2026, 9:12 AM
Expires: Fri May 1, 2026, 1:12 AM
Frost may damage some crops in frost-prone areas. What: Patchy frost is expected as temperatures drop to near or below freezing tonight. When: Overnight into early Friday morning. ### Damage to plants, trees, and crops is possible. 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.
Cover up plants, especially those in frost-prone areas.
yellow advisory - frost - 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: Thu April 30, 2026, 3:34 PM
Expires: Fri May 1, 2026, 7:34 AM
Frost may damage some crops in frost-prone areas. What: Patchy frost is expected as temperatures drop to near or below freezing. When: Overnight into early Friday morning. ### Damage to plants, trees, and crops is possible. 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.
Cover up plants, especially those in frost-prone areas.
Frost Advisory issued April 30 at 12:41PM EDT until May 1 at 9:00AM EDT by NWS Buffalo NY
Effective: Thu April 30, 2026, 12:41 PM
Expires: Fri May 1, 2026, 12:45 AM
* WHAT...Temperatures in the lower 30s will result in frost formation. * WHERE...Erie, Niagara, Orleans, Monroe, Wayne, Genesee, Wyoming, Livingston, Ontario, and Chautauqua Counties. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left unprotected.
Take steps now to protect tender plants from the cold.
Frost Advisory issued April 30 at 4:00PM EDT until May 1 at 9:00AM EDT by NWS Buffalo NY
Effective: Thu April 30, 2026, 4:00 PM
Expires: Fri May 1, 2026, 4:00 AM
* WHAT...Temperatures in the lower 30s will result in frost formation. * WHERE...Erie, Niagara, Orleans, Monroe, Wayne, Genesee, Wyoming, Livingston, Ontario, and Chautauqua Counties. * WHEN...From midnight tonight to 9 AM EDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left unprotected. * ADDITIONAL DETAILS...The coldest temperatures and greater risk of frost will be inland away from the lakeshores.
Take steps now to protect tender plants from the cold.
Weather Forecast
Air Quality
Nitrogen Dioxide: 14.93 μg/m3
Sulphur Dioxide: 5.12 μg/m3
Ozone: 64.08 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:19 PM
Daylight: 14 hrs 6 mins
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 AM1:20 PM - 3:50 PM
Minor Periods
7:11 PM - 8:41 PM4:50 AM - 6:20 AM
Action Rating: 5 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 27.07 μg/m3
Sulphur Dioxide: 7.42 μg/m3
Ozone: 44.44 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:20 PM
Daylight: 14 hrs 9 mins
Moon Transit: 12:46 AM
Moonset: 5:42 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:16 AM - 2:46 AM2:05 PM - 4:35 PM
Minor Periods
8:18 PM - 9:48 PM5:12 AM - 6:42 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 16.38 μg/m3
Sulphur Dioxide: 4.8 μg/m3
Ozone: 55.8 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:21 PM
Daylight: 14 hrs 11 mins
Moon Transit: 1:31 AM
Moonset: 6:09 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
1:01 AM - 3:31 AM2:51 PM - 5:21 PM
Minor Periods
9:23 PM - 10:53 PM5:39 AM - 7:09 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 16.98 μg/m3
Sulphur Dioxide: 4.24 μg/m3
Ozone: 60.36 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 14 mins
Moon Transit: 2:19 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:49 AM - 4:19 AM3:40 PM - 6:10 PM
Minor Periods
10:26 PM - 11:56 PM6:11 AM - 7:41 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.74 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 86.38 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:24 PM
Daylight: 14 hrs 16 mins
Moon Transit: 3:09 AM
Moonset: 7:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%
Best Times for Fishing or Hunting
Major Periods
2:39 AM - 5:09 AM4:31 PM - 7:01 PM
Minor Periods
12:00 AM - 12:00 AM6:50 AM - 8:20 AM
Action Rating: 2 out of 5
