Measurements:
°C
°F
CURRENT WEATHER
17:57
Thunder Bay
60°F
NW 5 mph
Feels like: 60°F
Precip: 7%
World Resorts Canada Thunder Bay Weather

14 Day Weather Forecast

09.28
mon
DAY
58°F
W 2 mph
precip
12%
NIGHT
58°F
NW 4 mph
precip
28%
09.29
tue
DAY
60°F
N 12 mph
precip
28%
NIGHT
56°F
NE 16 mph
precip
30%
09.30
wed
DAY
60°F
NE 9 mph
precip
30%
NIGHT
60°F
E 3 mph
precip
41%
10.01
thu
DAY
58°F
E 17 mph
precip
2%
NIGHT
48°F
SE 14 mph
precip
3%
10.02
fri
DAY
48°F
SE 16 mph
precip
3%
NIGHT
48°F
E 6 mph
precip
10%
10.03
sat
DAY
52°F
N 11 mph
precip
16%
NIGHT
54°F
N 14 mph
precip
19%
10.04
sun
DAY
52°F
NE 9 mph
precip
27%
NIGHT
42°F
SE 19 mph
precip
36%
10.05
mon
DAY
38°F
S 25 mph
precip
20%
NIGHT
36°F
S 9 mph
precip
15%
10.06
tue
DAY
40°F
NE 4 mph
precip
9%
NIGHT
46°F
NE 6 mph
precip
9%
10.07
wed
DAY
50°F
E 2 mph
precip
12%
NIGHT
48°F
SE 9 mph
precip
8%
10.08
thu
DAY
44°F
NE 15 mph
precip
14%
NIGHT
42°F
S 12 mph
precip
18%
10.09
fri
DAY
44°F
SW 9 mph
precip
3%
NIGHT
42°F
NE 7 mph
precip
11%
10.10
sat
DAY
46°F
NE 16 mph
precip
15%
NIGHT
48°F
NE 12 mph
precip
14%
10.11
sun
DAY
42°F
S 23 mph
precip
15%
NIGHT
40°F
NW 14 mph
precip
3%

Thunder Bay Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Thunder Bay was 60.9°F. The maximum and minimum values were 50.8°F and 67.2°F respectively.

Thunder Bay on the Weather Map

Best Time to Visit Thunder Bay
The most sunny months:
July 14 days
August 14 days
September 13 days
The most warm months:
July 73.4 °F
August 71.9 °F
June 65.3 °F
Warmest sea temperature:
August 64.6 °F
September 61.3 °F
July 59.4 °F
The most cold months:
January 9.8 °F
February 11.1 °F
December 17.9 °F
The most rainy months:
September 2 days
April 2 days
August 2 days
The most windy months:
November 9 mph
December 9 mph
April 8 mph
more details
Canada Resorts:
NAME
F°
Halifax +56
Moncton +54
Montreal +52
Nanaimo +58
Niagara Falls +64
Ottawa +54
Prince Edward Island +56
Quebec +50
Saint Andrews +56
St. John's +42
Sydney +54
Toronto +72
Vancouver +58
Victoria +58
Winnipeg +52
all resorts
24 Hours Weather Forecast
Thunder Bay
Local time: 17:57
28 sep, monday
1800 60°F
NW
5 mph
2100 58°F
W
2 mph
29 sep, tuesday
0000 58°F
NW
4 mph
0300 58°F
NW
4 mph
0600 58°F
N
5 mph
0900 58°F
N
9 mph
1200 60°F
N
12 mph
1500 62°F
NE
12 mph