Measurements:
°C
°F
CURRENT WEATHER
11:11
Saint John
76°F
NE 6 mph
Feels like: 80°F
Precip: 45%
World Resorts Canada Saint John Weather

7 Day Weather Forecast

08.19
wed
DAY
76°F
NE 6 mph
precip
45%
NIGHT
60°F
NE 5 mph
precip
44%
08.20
thu
DAY
74°F
N 3 mph
precip
20%
NIGHT
62°F
S 4 mph
precip
80%
08.21
fri
DAY
74°F
S 2 mph
precip
3%
NIGHT
62°F
S 4 mph
precip
20%
08.22
sat
DAY
72°F
W 3 mph
precip
6%
NIGHT
56°F
NW 2 mph
precip
25%
08.23
sun
DAY
68°F
W 12 mph
precip
16%
NIGHT
58°F
W 17 mph
precip
46%
08.24
mon
DAY
62°F
NE 9 mph
precip
37%
NIGHT
58°F
NE 8 mph
precip
17%
08.25
tue
DAY
70°F
NE 9 mph
precip
5%
NIGHT
56°F
NE 2 mph
precip
14%

Saint John Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Saint John was 14.5°F. The maximum and minimum values were 11.4°F and 16.6°F respectively.

Saint John on the Weather Map

Best Time to Visit Saint John
The most sunny months:
September 10 days
October 10 days
August 9 days
The most warm months:
July 74.9 °F
August 74.3 °F
June 69.6 °F
Warmest sea temperature:
August 60.6 °F
September 59.3 °F
July 57.3 °F
The most cold months:
January 22.9 °F
February 23.7 °F
December 30.5 °F
The most rainy months:
July 3 days
October 3 days
May 2 days
The most windy months:
March 9 mph
December 9 mph
February 8 mph
more details