Current Sea Water Temperature:
+39.2°F
| Maximum Sea Water Temperature in December: | 47.4°F |
| Minimum Sea Water Temperature in December: | 36.8°F |
| Average water temperature in December: | 41.2°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 13 | 39.2°F | December 08 | 40.4°F |
| December 12 | 38.8°F | December 07 | 40.6°F |
| December 11 | 39.4°F | December 06 | 40.4°F |
| December 10 | 39.8°F | December 05 | 40.2°F |
| December 09 | 39.6°F | December 04 | 40.2°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 |  |
+22 |
| Kingston |  |
+22 |
| Moncton |  |
+12 |
| Montreal |  |
+12 |
| Niagara Falls | |
+18 |
| Ottawa |  |
0 |
| Prince Edward Island | |
+20 |
| Quebec | |
+10 |
| St. John's |  |
+28 |
| Sydney | |
+24 |
| Toronto | |
+22 |
| Vancouver | |
+46 |
| Victoria | |
+48 |
| Winnipeg | |
-18 |
| Yellowknife | |
-12 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Niagara-on-the-Lake
Local time: 04:22
13 dec, saturday
| 0600 |  |
20°F | NE 16 mph |
| 0900 | |
28°F | E 16 mph |
| 1200 |  |
28°F | E 19 mph |
| 1500 |  |
24°F | E 18 mph |
| 1800 | |
20°F | E 16 mph |
| 2100 | |
18°F | E 15 mph |
14 dec, sunday
| 0000 | |
14°F | E 14 mph |
| 0300 | |
14°F | E 16 mph |