Current sea water temperature:
+34.3°F
| Minimum sea water temperature in March: | 40.6°F |
| Maximum sea water temperature in March: | 33.6°F |
| Average sea water temperature in March: | 37.1°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| March 17 | 34.3°F | March 12 | 36.7°F |
| March 16 | 35.6°F | March 11 | 36.9°F |
| March 15 | 35.6°F | March 10 | 35.6°F |
| March 14 | 36.0°F | March 9 | 35.4°F |
| March 13 | 36.7°F | March 8 | 34.7°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
March
March
| Oshawa |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 04:36
March 17, tuesday
0600
12°F
E
29 mph
29 mph
0900
12°F
E
22 mph
22 mph
1200
16°F
E
23 mph
23 mph
1500
19°F
SE
21 mph
21 mph
1800
21°F
SE
19 mph
19 mph
2100
19°F
E
16 mph
16 mph
March 18, wednesday
0000
18°F
SE
11 mph
11 mph
0300
19°F
SE
9 mph
9 mph
