Measurements:
°C
°F
CURRENT WEATHER
17:15
Summerside
58°F
S 21 mph
Feels like: 56°F
Precip: 59%
World Resorts Canada Summerside Weather

7 Day Weather Forecast

09.08
tue
DAY
60°F
SE 19 mph
precip
28%
NIGHT
54°F
S 21 mph
precip
26%
09.09
wed
DAY
58°F
SE 6 mph
precip
15%
NIGHT
56°F
N 19 mph
precip
9%
09.10
thu
DAY
66°F
NE 19 mph
precip
34%
NIGHT
62°F
E 14 mph
precip
23%
09.11
fri
DAY
54°F
E 20 mph
precip
20%
NIGHT
54°F
SE 17 mph
precip
11%
09.12
sat
DAY
56°F
E 8 mph
precip
19%
NIGHT
52°F
N 8 mph
precip
24%
09.13
sun
DAY
64°F
NE 19 mph
precip
16%
NIGHT
62°F
NE 19 mph
precip
23%
09.14
mon
DAY
68°F
NE 17 mph
precip
22%
NIGHT
58°F
S 13 mph
precip
76%

Summerside Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Summerside was 19.0°F. The maximum and minimum values were 16.3°F and 21.1°F respectively.

Summerside on the Weather Map

Best Time to Visit Summerside
The most sunny months:
August 12 days
May 10 days
July 10 days
The most warm months:
August 73.8 °F
July 73.2 °F
September 65.8 °F
Warmest sea temperature:
August 72.6 °F
July 70.7 °F
September 67.1 °F
The most cold months:
February 20.5 °F
January 21.6 °F
March 29.0 °F
The most rainy months:
August 3 days
June 3 days
September 3 days
The most windy months:
November 16 mph
December 16 mph
January 14 mph
more details