Current sea water temperature:
+38.3°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: | 39.9°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| December 28 | 38.3°F | December 23 | 38.5°F |
| December 27 | 38.7°F | December 22 | 38.5°F |
| December 26 | 39.2°F | December 21 | 37.6°F |
| December 25 | 38.7°F | December 20 | 37.8°F |
| December 24 | 38.3°F | December 19 | 37.6°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
January
January
| Oshawa |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 18:52
December 28, sunday
2100
36°F
W
19 mph
19 mph
December 29, monday
0000
36°F
W
21 mph
21 mph
0300
36°F
W
16 mph
16 mph
0600
37°F
W
8 mph
8 mph
0900
36°F
NE
29 mph
29 mph
1200
30°F
NE
33 mph
33 mph
1500
28°F
NE
32 mph
32 mph
1800
27°F
NE
34 mph
34 mph
