World Resorts Canada Thunder Bay Weather

Thunder Bay sea water temperature

Current sea water temperature:
+32.9°F
Minimum sea water temperature in February: 36.0°F
Maximum sea water temperature in February: 32.5°F
Average sea water temperature in February: 33.4°F

Sea water temperature for the last 10 days:

February 4 32.9°F January 30 32.9°F
February 3 32.9°F January 29 32.9°F
February 2 32.9°F January 28 32.9°F
February 1 32.9°F January 27 32.9°F
January 31 32.9°F January 26 32.9°F

When is the warmest sea in Thunder Bay?

Based on the data about daily sea water temperature for the last three years the warmest sea in Thunder Bay was noticed in August, September and July.

Monthly Sea Temperatures in Thunder Bay, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 68.0°F and 59.9°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 59.9°F. The highest and lowest sea temperatures during the month were 62.2°F and 57.4°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 61.1°F. The highest and lowest sea temperatures during the month were 64.9°F and 55.2°F.

Best time for vacation in Thunder Bay

Sunniest months:
September 14 days
August 14 days
July 12 days
Warmest months:
July 69.3 °F
August 69.1 °F
June 63.0 °F
Warmest sea temp:
August 63.4 °F
September 60.2 °F
July 59.6 °F
Coldest months:
January 13.9 °F
February 14.2 °F
December 21.1 °F
Rainiest months:
September 2 days
August 2 days
April 2 days
Windiest months:
November 9.6 mph
December 9.2 mph
April 8.8 mph

Thunder Bay on a weather map

Thunder Bay
+19°F
NE 2 mph
Feels like: +14°F
Precip.: 0%
Places in Canada:
Name
°F
+61°F
+52°F
+27°F
+23°F
-8°F
+12°F
+25°F
+19°F
+19°F
+10°F
+14°F
+12°F
+30°F
+12°F
24 Hours Forecast
Thunder Bay
Local time: 22:22
February 05, thursday
0000
16°F
N
2 mph
0300
14°F
N
6 mph
0600
18°F
N
9 mph
0900
19°F
NE
6 mph
1200
27°F
E
7 mph
1500
32°F
SE
7 mph
1800
32°F
E
6 mph
2100
28°F
E
4 mph
Units of measurement: °C / °F