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

11.7°C
Clear
Clear
10.1°C
11.4°C
52%
SW 14.4 kph
30.2 kph
8.6°C
-2.1°C
0 mm
0%
10 km
1014 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 19°C
L: 3°C
Heavy rain
Wed
H: 4°C
L: 2°C
Moderate or heavy snow showers
Thu
H: 6°C
L: -3°C
Heavy snow
Fri
H: 3°C
L: -2°C
Patchy moderate snow
Sat
H: 1°C
L: -3°C

Air Quality

AQI: 1 - Good
PM2.5: 12.65 μg/m3
PM10: 12.65 μg/m3
Carbon Monoxide: 250.85 μg/m3
Nitrogen Dioxide: 20.55 μg/m3
Sulphur Dioxide: 6.15 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 1:28 PM
Sunset: 7:18 PM
Daylight: 11 hrs 40 mins
Moonrise: 2:19 AM
Moon Transit: 6:32 AM
Moonset: 10:44 AM
Moon Phase: Last Quarter
Moon Illumination: 47.2%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
7:55 PM - 10:25 PM

Minor Periods

10:14 AM - 11:44 AM
1:49 AM - 3:19 AM

Action Rating: 2 out of 5

special weather statement 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: Mon March 9, 2026, 2:06 PM
Expires: Tue March 10, 2026, 6:06 AM

Potential for significant rainfall this week. The saturated or frozen ground will have little ability to absorb this rainfall. What: Rainfall amounts of 20 to 40 mm. Locally higher amounts are possible in areas that receive thunderstorms. When: Beginning Tuesday night and lasting through Wednesday. Where: Most of southern Ontario. Additional information: A series of low pressure systems will lead to significant rainfall across parts of southern Ontario. Heavy downpours may cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible. Rainfall warnings may be issued for some areas as the event draws nearer. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details. ### 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.


Flood Warning issued March 9 at 12:06PM EDT until March 10 at 2:00PM EDT by NWS Buffalo NY

Effective: Mon March 9, 2026, 12:06 PM
Expires: Tue March 10, 2026, 3:00 AM

...The Flood Warning is extended for the following rivers in New York... Tonawanda Creek At Rapids affecting Niagara and Erie Counties. For the Tonawanda Creek...including Rapids...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Tonawanda Creek at Rapids. * WHEN...From Tuesday morning to early Tuesday afternoon. * IMPACTS...At 12.0 feet, Flood stage, lowland flooding of farm areas along Tonawanda Creek between Rapids and the Tonawanda Indian Reservation. Flooding may impact Fletcher, Burdick, Kelkenberg, and Tonawanda Creek Roads. * ADDITIONAL DETAILS... - At 11:00 AM EDT Monday the stage was 9.79 feet and rising. - Bankfull stage is 10.0 feet. - Forecast...The river is expected to rise to a crest of near 12.0 feet Tuesday morning. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued late tonight by 300 AM EDT.


Tuesday, March 10, 2026

Weather Forecast

Patchy rain nearby
19.1°C
3.1°C
11.7°C
70%
1.22 mm
89%
0%
21.6 kph
0.4


Air Quality

AQI: 2 - Moderate
PM2.5: 17.89 μg/m3
PM10: 17.99 μg/m3
Carbon Monoxide: 357.09 μg/m3
Nitrogen Dioxide: 29.55 μg/m3
Sulphur Dioxide: 11.16 μg/m3
Ozone: 47.72 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 1:28 PM
Sunset: 7:18 PM
Daylight: 11 hrs 40 mins
Moonrise: 2:19 AM
Moon Transit: 6:32 AM
Moonset: 10:44 AM
Moon Phase: Last Quarter
Moon Illumination: 47.2%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
7:55 PM - 10:25 PM

Minor Periods

10:14 AM - 11:44 AM
1:49 AM - 3:19 AM

Action Rating: 2 out of 5

Wednesday, March 11, 2026

Weather Forecast

Heavy rain
4.3°C
1.6°C
3.1°C
97%
105.6 mm
87%
0%
37.8 kph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 9.16 μg/m3
PM10: 9.27 μg/m3
Carbon Monoxide: 285.17 μg/m3
Nitrogen Dioxide: 23.07 μg/m3
Sulphur Dioxide: 5.48 μg/m3
Ozone: 34.4 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 1:28 PM
Sunset: 7:20 PM
Daylight: 11 hrs 43 mins
Moonrise: 3:17 AM
Moon Transit: 7:24 AM
Moonset: 11:29 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
8:46 PM - 11:16 PM

Minor Periods

10:59 AM - 12:29 AM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Thursday, March 12, 2026

Weather Forecast

Moderate or heavy snow showers
5.5°C
-2.5°C
0.6°C
68%
3.14 mm
75%
9%
42.8 kph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 3.04 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 223.77 μg/m3
Nitrogen Dioxide: 8.28 μg/m3
Sulphur Dioxide: 3.37 μg/m3
Ozone: 80.04 μg/m3

Astronomical

Sunrise: 7:35 AM
Sun Transit: 12:00 AM
Sunset: 7:21 PM
Daylight: 11 hrs 46 mins
Moonrise: 4:10 AM
Moon Transit: 8:16 AM
Moonset: 12:24 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

7:46 AM - 10:16 AM
12:00 AM - 12:00 AM

Minor Periods

11:54 AM - 1:24 PM
3:40 AM - 5:10 AM

Action Rating: 3 out of 5

Friday, March 13, 2026

Weather Forecast

Heavy snow
3.1°C
-1.7°C
-0.3°C
82%
9.43 mm
68%
23%
53.3 kph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.66 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 240.76 μg/m3
Nitrogen Dioxide: 13.07 μg/m3
Sulphur Dioxide: 5.19 μg/m3
Ozone: 74.4 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:00 AM
Sunset: 7:22 PM
Daylight: 11 hrs 49 mins
Moonrise: 4:54 AM
Moon Transit: 9:07 AM
Moonset: 1:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 16.4%

Best Times for Fishing or Hunting

Major Periods

8:37 AM - 11:07 AM
12:00 AM - 12:00 AM

Minor Periods

12:56 AM - 2:26 PM
4:24 AM - 5:54 AM

Action Rating: 2 out of 5

Saturday, March 14, 2026

Weather Forecast

Patchy moderate snow
0.7°C
-2.7°C
-1.1°C
75%
0.97 mm
83%
19%
49.7 kph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.17 μg/m3
PM10: 3.91 μg/m3
Carbon Monoxide: 176.67 μg/m3
Nitrogen Dioxide: 4.64 μg/m3
Sulphur Dioxide: 2.2 μg/m3
Ozone: 92.54 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 12:00 AM
Sunset: 7:23 PM
Daylight: 11 hrs 52 mins
Moonrise: 5:30 AM
Moon Transit: 9:58 AM
Moonset: 2:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:28 AM - 11:58 AM

Minor Periods

2:03 PM - 3:33 PM
5:00 AM - 6:30 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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