Measurements:
°C
°F
CURRENT WEATHER
05:59
Saint John
64°F
SW 6 mph
Feels like: 64°F
Precip: 15%
World Resorts Canada Saint John Weather

7 Day Weather Forecast

07.30
thu
DAY
72°F
SW 7 mph
precip
14%
NIGHT
62°F
S 8 mph
precip
33%
07.31
fri
DAY
66°F
S 9 mph
precip
26%
NIGHT
60°F
E 4 mph
precip
18%
08.01
sat
DAY
76°F
N 5 mph
precip
5%
NIGHT
58°F
NE 6 mph
precip
43%
08.02
sun
DAY
72°F
NE 10 mph
precip
6%
NIGHT
58°F
N 5 mph
precip
22%
08.03
mon
DAY
66°F
N 8 mph
precip
33%
NIGHT
60°F
NE 7 mph
precip
51%
08.04
tue
DAY
68°F
NE 9 mph
precip
16%
NIGHT
62°F
NE 4 mph
precip
24%
08.05
wed
DAY
82°F
E 3 mph
precip
3%
NIGHT
60°F
N 5 mph
precip
11%

Saint John Sea Water Temperature in July, °F

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Saint John was 12.5°F. The maximum and minimum values were 10.4°F and 16.0°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