Current sea water temperature:
+39.4°F
| Minimum sea water temperature in December: | 47.7°F |
| Maximum sea water temperature in December: | 38.1°F |
| Average sea water temperature in December: | 42.0°F |
| more information | |
14 days
forecast
forecast
| Niagara-on-the-Lake |
monthly
weather
weather
| Niagara-on-the-Lake |
Sea water temperature for the last 10 days:
| December 18 | 39.4°F | December 13 | 40.3°F |
| December 17 | 39.4°F | December 12 | 39.9°F |
| December 16 | 39.4°F | December 11 | 40.5°F |
| December 15 | 39.6°F | December 10 | 40.8°F |
| December 14 | 39.7°F | December 9 | 40.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Niagara-on-the-Lake?
Based on the data about daily sea water temperature for the last three years the warmest sea in Niagara-on-the-Lake was noticed in August, July and September.
Monthly Sea Temperatures in Niagara-on-the-Lake, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 74.7°F. The highest and lowest sea temperatures during the month were 77.7°F and 70.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 74.3°F. The highest and lowest sea temperatures during the month were 78.4°F and 67.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 67.8°F. The highest and lowest sea temperatures during the month were 70.0°F and 65.7°F.
current
weather
weather
| Niagara-on-the-Lake |
weather in
December
December
| Niagara-on-the-Lake |
Best time for vacation in Niagara-on-the-Lake
Niagara-on-the-Lake on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Niagara-on-the-Lake
Local time: 20:20
December 18, thursday
2100
48°F
N
19 mph
19 mph
December 19, friday
0000
50°F
N
23 mph
23 mph
0300
50°F
N
24 mph
24 mph
0600
48°F
N
22 mph
22 mph
0900
37°F
NE
19 mph
19 mph
1200
32°F
E
24 mph
24 mph
1500
28°F
NE
27 mph
27 mph
1800
27°F
E
27 mph
27 mph
