Current sea water temperature:
+37.6°F
| Minimum sea water temperature in December: | 44.4°F |
| Maximum sea water temperature in December: | 37.4°F |
| Average sea water temperature in December: | 40.0°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| December 19 | 37.6°F | December 14 | 38.1°F |
| December 18 | 37.9°F | December 13 | 37.8°F |
| December 17 | 37.8°F | December 12 | 38.1°F |
| December 16 | 37.4°F | December 11 | 38.5°F |
| December 15 | 37.9°F | December 10 | 38.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Oshawa?
Based on the data about daily sea water temperature for the last three years the warmest sea in Oshawa was noticed in August, September and July.
Monthly Sea Temperatures in Oshawa, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.1°F. The highest and lowest sea temperatures during the month were 77.7°F and 69.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.2°F. The highest and lowest sea temperatures during the month were 68.0°F and 57.6°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 67.1°F. The highest and lowest sea temperatures during the month were 74.5°F and 60.4°F.
current
weather
weather
| Oshawa |
weather in
December
December
| Oshawa |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 15:13
December 19, friday
1800
30°F
E
26 mph
26 mph
2100
25°F
E
25 mph
25 mph
December 20, saturday
0000
23°F
SE
20 mph
20 mph
0300
23°F
E
16 mph
16 mph
0600
23°F
E
8 mph
8 mph
0900
27°F
NE
6 mph
6 mph
1200
28°F
N
14 mph
14 mph
1500
32°F
N
16 mph
16 mph
