Measurements:
°C
°F
CURRENT WEATHER
20:25
Oshawa
64°F
W 5 mph
Feels like: 64°F
Precip: 20%
World Resorts Canada Oshawa Weather

7 Day Weather Forecast

09.28
mon
DAY
66°F
SW 7 mph
precip
15%
NIGHT
60°F
W 5 mph
precip
26%
09.29
tue
DAY
64°F
N 6 mph
precip
17%
NIGHT
58°F
N 2 mph
precip
31%
09.30
wed
DAY
66°F
NE 9 mph
precip
23%
NIGHT
66°F
E 4 mph
precip
18%
10.01
thu
DAY
66°F
N 8 mph
precip
24%
NIGHT
64°F
E 5 mph
precip
63%
10.02
fri
DAY
56°F
SE 9 mph
precip
28%
NIGHT
48°F
E 6 mph
precip
6%
10.03
sat
DAY
56°F
SE 7 mph
precip
4%
NIGHT
48°F
SW 5 mph
precip
17%
10.04
sun
DAY
56°F
NW 17 mph
precip
50%
NIGHT
58°F
N 11 mph
precip
85%

Oshawa Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Oshawa was 19.2°F. The maximum and minimum values were 15.6°F and 21.3°F respectively.

Oshawa on the Weather Map

Best Time to Visit Oshawa
The most sunny months:
September 14 days
August 14 days
July 14 days
The most warm months:
July 79.8 °F
August 78.1 °F
June 72.8 °F
Warmest sea temperature:
August 72.5 °F
September 69.1 °F
July 68.3 °F
The most cold months:
January 24.0 °F
February 25.1 °F
December 31.8 °F
The most rainy months:
July 3 days
April 2 days
August 2 days
The most windy months:
December 11 mph
November 11 mph
January 11 mph
more details