Current Sea Water Temperature:
+43.6°F
| Maximum Sea Water Temperature in May: | 62.4°F |
| Minimum Sea Water Temperature in May: | 40.0°F |
| Average water temperature in May: | 48.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| May 19 | 43.6°F | May 14 | 45.2°F |
| May 18 | 43.2°F | May 13 | 47.4°F |
| May 17 | 43.2°F | May 12 | 45.4°F |
| May 16 | 44.8°F | May 11 | 46.2°F |
| May 15 | 44.8°F | May 10 | 45.2°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°
| Bonavista |  |
+38 |
| Halifax |  |
+52 |
| Les Iles-de-la-Madeleine | |
+44 |
| Montreal |  |
+74 |
| Ottawa | |
+74 |
| Prince Edward Island | |
+52 |
| Quebec | |
+52 |
| Saint John | |
+48 |
| Sydney |  |
+42 |
| Thunder Bay | |
+40 |
| Tofino | |
+52 |
| Toronto | |
+72 |
| Vancouver | |
+52 |
| Victoria | |
+50 |
| Winnipeg | |
+40 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Niagara-on-the-Lake
Local time: 09:21
19 may, tuesday
| 1200 |  |
86°F | NE 20 mph |
| 1500 | |
90°F | NE 20 mph |
| 1800 |  |
76°F | NE 19 mph |
| 2100 |  |
66°F | NE 19 mph |
20 may, wednesday
| 0000 |  |
64°F | NE 20 mph |
| 0300 | |
62°F | NE 15 mph |
| 0600 | |
54°F | SE 9 mph |
| 0900 |  |
52°F | SE 11 mph |