09.08
tue
tue
DAY
60°F
SE 9 mph
precip
33%
33%
NIGHT
52°F
S 7 mph
precip
24%
24%
09.09
wed
wed
DAY
54°F
SW 11 mph
precip
21%
21%
NIGHT
46°F
S 1 mph
precip
15%
15%
09.10
thu
thu
DAY
62°F
N 11 mph
precip
14%
14%
NIGHT
56°F
N 17 mph
precip
56%
56%
09.11
fri
fri
DAY
74°F
NE 16 mph
precip
3%
3%
NIGHT
52°F
E 14 mph
precip
8%
8%
09.12
sat
sat
DAY
54°F
SE 13 mph
precip
22%
22%
NIGHT
46°F
SE 11 mph
precip
6%
6%
09.13
sun
sun
DAY
58°F
E 4 mph
precip
1%
1%
NIGHT
48°F
NE 9 mph
precip
27%
27%
09.14
mon
mon
DAY
62°F
NE 14 mph
precip
18%
18%
NIGHT
60°F
NE 14 mph
precip
27%
27%
09.15
tue
tue
DAY
54°F
E 19 mph
precip
24%
24%
NIGHT
44°F
E 3 mph
precip
25%
25%
09.16
wed
wed
DAY
54°F
NE 7 mph
precip
16%
16%
NIGHT
62°F
NE 12 mph
precip
51%
51%
09.17
thu
thu
DAY
58°F
SE 12 mph
precip
19%
19%
NIGHT
46°F
SE 16 mph
precip
4%
4%
09.18
fri
fri
DAY
46°F
E 11 mph
precip
18%
18%
NIGHT
46°F
E 8 mph
precip
24%
24%
09.19
sat
sat
DAY
62°F
NE 15 mph
precip
8%
8%
NIGHT
56°F
N 16 mph
precip
24%
24%
09.20
sun
sun
DAY
60°F
N 19 mph
precip
78%
78%
NIGHT
42°F
SE 13 mph
precip
25%
25%
09.21
mon
mon
DAY
54°F
E 8 mph
precip
1%
1%
NIGHT
44°F
NE 7 mph
precip
10%
10%
Sea water
temperature
temperature
| St. John's |
Weather in
September
September
| St. John's |
7 day weather
forecast
forecast
| St. John's |
10 day weather
forecast
forecast
| St. John's |
14 day weather
forecast
forecast
| St. John's |
Monthly weather
averages
averages
| St. John's |
Current Weather
Conditions
Conditions
| St. John's |
When is the Best
Time to Visit?
Time to Visit?
| St. John's |
St. John's Sea Water Temperature in September, °F
The average sea surface temperature in September 2025 for St. John's was 56.7°F. The maximum and minimum values were 54.4°F and 59.4°F respectively.
St. John's on the Weather Map
Canada Resorts:
NAME
F°
| Halifax |  |
+66 |
| Montreal |  |
+70 |
| Niagara Falls | |
+84 |
| Ottawa |  |
+72 |
| Prince Edward Island | |
+58 |
| Quebec |  |
+68 |
| Saint Andrews |  |
+62 |
| Saint John | |
+68 |
| Sydney | |
+60 |
| Thunder Bay | |
+74 |
| Toronto | |
+80 |
| Vancouver | |
+74 |
| Victoria |  |
+64 |
| Winnipeg | |
+64 |
| Yellowknife | |
+60 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
St. John's
Local time: 19:41
08 sep, tuesday
| 2100 | |
52°F | S 6 mph |
09 sep, wednesday
| 0000 | |
52°F | S 7 mph |
| 0300 | |
50°F | S 6 mph |
| 0600 | |
48°F | SW 7 mph |
| 0900 | |
52°F | SW 9 mph |
| 1200 | |
54°F | SW 11 mph |
| 1500 | |
52°F | SW 11 mph |
| 1800 | |
50°F | SW 7 mph |