09.08
tue
tue
DAY
66°F
N 16 mph
precip
93%
93%
NIGHT
68°F
NE 15 mph
precip
14%
14%
09.09
wed
wed
DAY
64°F
E 15 mph
precip
4%
4%
NIGHT
54°F
SE 7 mph
precip
9%
9%
09.10
thu
thu
DAY
58°F
SE 5 mph
precip
2%
2%
NIGHT
58°F
N 7 mph
precip
12%
12%
09.11
fri
fri
DAY
68°F
NE 16 mph
precip
24%
24%
NIGHT
64°F
N 22 mph
precip
66%
66%
09.12
sat
sat
DAY
58°F
E 11 mph
precip
10%
10%
NIGHT
56°F
E 8 mph
precip
11%
11%
09.13
sun
sun
DAY
58°F
SE 7 mph
precip
9%
9%
NIGHT
56°F
E 6 mph
precip
15%
15%
09.14
mon
mon
DAY
54°F
SW 12 mph
precip
17%
17%
NIGHT
54°F
W 10 mph
precip
33%
33%
09.15
tue
tue
DAY
50°F
SE 13 mph
precip
55%
55%
NIGHT
54°F
E 9 mph
precip
11%
11%
09.16
wed
wed
DAY
56°F
NW 6 mph
precip
20%
20%
NIGHT
62°F
N 18 mph
precip
36%
36%
09.17
thu
thu
DAY
58°F
NE 13 mph
precip
10%
10%
NIGHT
60°F
NE 16 mph
precip
7%
7%
09.18
fri
fri
DAY
56°F
SE 13 mph
precip
25%
25%
NIGHT
44°F
SE 14 mph
precip
3%
3%
09.19
sat
sat
DAY
44°F
SE 13 mph
precip
3%
3%
NIGHT
48°F
E 7 mph
precip
3%
3%
09.20
sun
sun
DAY
54°F
NE 17 mph
precip
4%
4%
NIGHT
56°F
NE 14 mph
precip
4%
4%
09.21
mon
mon
DAY
60°F
NE 9 mph
precip
4%
4%
NIGHT
60°F
NE 12 mph
precip
6%
6%
Sea water
temperature
temperature
| Thunder Bay |
Weather in
September
September
| Thunder Bay |
7 day weather
forecast
forecast
| Thunder Bay |
10 day weather
forecast
forecast
| Thunder Bay |
14 day weather
forecast
forecast
| Thunder Bay |
Monthly weather
averages
averages
| Thunder Bay |
Current Weather
Conditions
Conditions
| Thunder Bay |
When is the Best
Time to Visit?
Time to Visit?
| Thunder Bay |
Thunder Bay Sea Water Temperature in September, °F
The average sea surface temperature in September 2025 for Thunder Bay was 61.0°F. The maximum and minimum values were 58.2°F and 63.6°F respectively.
Thunder Bay on the Weather Map
Canada Resorts:
NAME
F°
| Halifax |  |
+62 |
| Montreal |  |
+72 |
| Niagara Falls |  |
+80 |
| Ottawa | |
+70 |
| Prince Edward Island | |
+54 |
| Quebec | |
+68 |
| Saint Andrews | |
+64 |
| Saint John | |
+66 |
| Sydney | |
+64 |
| Thunder Bay | |
+62 |
| Toronto | |
+78 |
| Vancouver | |
+60 |
| Victoria | |
+62 |
| Winnipeg |  |
+72 |
| Yellowknife | |
+60 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Thunder Bay
Local time: 16:18
08 sep, tuesday
| 1800 | |
64°F | NE 14 mph |
| 2100 | |
66°F | NE 14 mph |
09 sep, wednesday
| 0000 | |
68°F | NE 15 mph |
| 0300 | |
70°F | NE 14 mph |
| 0600 | |
62°F | E 14 mph |
| 0900 | |
60°F | E 14 mph |
| 1200 | |
64°F | E 15 mph |
| 1500 | |
68°F | E 17 mph |