Current Sea Water Temperature:
+40.2°F
| Maximum Sea Water Temperature in December: | 47.4°F |
| Minimum Sea Water Temperature in December: | 36.8°F |
| Average water temperature in December: | 41.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 04 | 40.2°F | November 29 | 44.4°F |
| December 03 | 41.6°F | November 28 | 45.2°F |
| December 02 | 41.4°F | November 27 | 45.2°F |
| December 01 | 43.2°F | November 26 | 45.4°F |
| November 30 | 43.2°F | November 25 | 46.0°F |
When is the Warmest Sea for Niagara-on-the-Lake?
According to our data for the last three years for Niagara-on-the-Lake the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Niagara-on-the-Lake was 77.5°F. The maximum and minimum values were 72.2°F and 80.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Niagara-on-the-Lake was 77.0°F. The maximum and minimum values were 69.0°F and 81.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Niagara-on-the-Lake was 69.8°F. The maximum and minimum values were 67.4°F and 72.2°F respectively.
Canada Resorts:
NAME
F°
| Halifax |  |
+12 |
| Kingston |  |
+4 |
| Moncton | |
-6 |
| Montreal | |
-2 |
| Niagara Falls | |
+10 |
| Ottawa | |
-4 |
| Prince Edward Island |  |
+6 |
| Quebec | |
-12 |
| Rocky Harbour |  |
+28 |
| St. John's | |
+32 |
| Sydney | |
+24 |
| Toronto | |
+10 |
| Vancouver | |
+42 |
| Victoria | |
+44 |
| Winnipeg | |
+12 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Niagara-on-the-Lake
Local time: 01:08
05 dec, friday
| 0300 |  |
8°F | N 7 mph |
| 0600 |  |
10°F | N 9 mph |
| 0900 |  |
16°F | N 10 mph |
| 1200 | |
24°F | N 10 mph |
| 1500 | |
28°F | NE 11 mph |
| 1800 | |
28°F | NE 8 mph |
| 2100 | |
30°F | NE 9 mph |
06 dec, saturday
| 0000 | |
28°F | NE 12 mph |