Measurements:
°C
°F
CURRENT WEATHER
05:33
Thunder Bay
16°F
SE 6 mph
Feels like: 8°F
Precip: 0%
World Resorts Canada Thunder Bay Weather

7 Day Weather Forecast

03.30
mon
DAY
32°F
SW 7 mph
precip
0%
NIGHT
24°F
SW 7 mph
precip
0%
03.31
tue
DAY
24°F
W 15 mph
precip
100%
NIGHT
18°F
SW 2 mph
precip
0%
04.01
wed
DAY
22°F
SW 7 mph
precip
0%
NIGHT
18°F
SW 7 mph
precip
0%
04.02
thu
DAY
18°F
W 14 mph
precip
65%
NIGHT
20°F
SW 12 mph
precip
100%
04.03
fri
DAY
26°F
SW 11 mph
precip
63%
NIGHT
26°F
SW 9 mph
precip
100%
04.04
sat
DAY
26°F
SW 9 mph
precip
100%
NIGHT
24°F
SE 12 mph
precip
100%
04.05
sun
DAY
28°F
S 9 mph
precip
0%
NIGHT
14°F
N 1 mph
precip
51%

Thunder Bay Sea Water Temperature in March, °F

Select Year: 2026 2025 2024

The average sea surface temperature in March 2026 for Thunder Bay was 0.4°F. The maximum and minimum values were 0.3°F and 0.4°F respectively.

Thunder Bay on the Weather Map

Best Time to Visit Thunder Bay
The most sunny months:
September 14 days
August 14 days
July 12 days
The most warm months:
July 71.5 °F
August 71.2 °F
June 64.4 °F
Warmest sea temperature:
August 64.9 °F
September 61.3 °F
July 60.6 °F
The most cold months:
January 9.8 °F
February 11.1 °F
December 17.9 °F
The most rainy months:
September 2 days
August 2 days
April 2 days
The most windy months:
November 9 mph
December 9 mph
April 9 mph
more details