Current Sea Water Temperature:
+37.0°F
| Maximum Sea Water Temperature in April: | 45.2°F |
| Minimum Sea Water Temperature in April: | 32.6°F |
| Average water temperature in April: | 39.0°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| April 19 | 37.0°F | April 14 | 38.2°F |
| April 18 | 37.6°F | April 13 | 40.6°F |
| April 17 | 37.8°F | April 12 | 39.6°F |
| April 16 | 37.4°F | April 11 | 35.8°F |
| April 15 | 37.6°F | April 10 | 35.6°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 |  |
+48 |
| Les Iles-de-la-Madeleine | |
+46 |
| Montreal |  |
+38 |
| Ottawa | |
+42 |
| Prince Edward Island | |
+54 |
| Quebec | |
+44 |
| Saint John | |
+42 |
| Sydney | |
+46 |
| Thunder Bay |  |
+24 |
| Tofino | |
+56 |
| Toronto | |
+44 |
| Vancouver | |
+56 |
| Victoria | |
+56 |
| Winnipeg | |
+30 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Niagara-on-the-Lake
Local time: 12:47
19 apr, sunday
| 1500 |  |
46°F | E 12 mph |
| 1800 | |
46°F | E 12 mph |
| 2100 |  |
38°F | SW 9 mph |
20 apr, monday
| 0000 |  |
34°F | SE 16 mph |
| 0300 | |
30°F | SE 17 mph |
| 0600 | |
30°F | SE 15 mph |
| 0900 | |
32°F | SE 14 mph |
| 1200 |  |
34°F | SE 8 mph |