Measurements:
°C
°F
CURRENT WEATHER
03:27
Thunder Bay
50°F
SE 10 mph
Feels like: 44°F
Precip: 11%
World Resorts Canada Thunder Bay Weather

7 Day Weather Forecast

10.19
mon
DAY
50°F
S 6 mph
precip
2%
NIGHT
46°F
W 3 mph
precip
5%
10.20
tue
DAY
50°F
NW 6 mph
precip
5%
NIGHT
48°F
NE 3 mph
precip
10%
10.21
wed
DAY
56°F
E 6 mph
precip
18%
NIGHT
48°F
S 5 mph
precip
12%
10.22
thu
DAY
50°F
W 6 mph
precip
9%
NIGHT
46°F
W 5 mph
precip
14%
10.23
fri
DAY
50°F
W 5 mph
precip
21%
NIGHT
50°F
NW 4 mph
precip
35%
10.24
sat
DAY
56°F
N 16 mph
precip
19%
NIGHT
56°F
NE 21 mph
precip
10%
10.25
sun
DAY
42°F
SE 17 mph
precip
13%
NIGHT
38°F
SE 6 mph
precip
12%

Thunder Bay Sea Water Temperature in October, °F

Select Year: 2026 2025 2024

The average sea surface temperature in October 2026 for Thunder Bay was 12.0°F. The maximum and minimum values were 10.8°F and 14.2°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 61.2 °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