Measurements:
°C
°F
CURRENT WEATHER
04:19
Thunder Bay
44°F
W 6 mph
Feels like: 40°F
Precip: 0%
World Resorts Canada Thunder Bay Weather

7 Day Weather Forecast

05.18
sat
DAY
52°F
NW 7 mph
precip
100%
NIGHT
54°F
E 15 mph
precip
0%
05.19
sun
DAY
62°F
E 12 mph
precip
0%
NIGHT
54°F
E 4 mph
precip
0%
05.20
mon
DAY
50°F
NW 7 mph
precip
64%
NIGHT
48°F
SW 2 mph
precip
0%
05.21
tue
DAY
56°F
NW 6 mph
precip
61%
NIGHT
48°F
W 14 mph
precip
100%
05.22
wed
DAY
44°F
S 8 mph
precip
100%
NIGHT
36°F
SE 16 mph
precip
51%
05.23
thu
DAY
42°F
SE 14 mph
precip
69%
NIGHT
36°F
SE 7 mph
precip
0%
05.24
fri
DAY
52°F
N 4 mph
precip
0%
NIGHT
42°F
W 6 mph
precip
100%

Thunder Bay Sea Water Temperature in May, °F

Select Year: 2023 2022 2021

The average sea surface temperature in May 2023 for Thunder Bay was 3.3°F. The maximum and minimum values were 1.4°F and 5.4°F respectively.

Thunder Bay on the Weather Map

Best Time to Visit Thunder Bay
The most sunny months:
September 15 days
August 14 days
July 13 days
The most warm months:
July 71.3 °F
August 71.0 °F
June 65.2 °F
Warmest sea temperature:
August 64.2 °F
September 60.4 °F
July 59.9 °F
The most cold months:
February 10.2 °F
January 11.1 °F
December 19.0 °F
The most rainy months:
September 3 days
August 3 days
April 2 days
The most windy months:
November 9 mph
December 9 mph
April 9 mph
more details