Average sea water temperature in April:
+34.5°F
| Minimum sea water temperature in April: | 38.7°F |
| Maximum sea water temperature in April: | 32.5°F |
Daily sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 33.4°F. The highest and lowest sea temperatures during the month were 34.9°F and 32.7°F.
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| Thunder Bay |
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Monthly sea water temperature in Thunder Bay, °F
Which Canada resorts have warmest sea in April?
| Place name | April 2026 | April 2025 |
|---|---|---|
| Surrey | 51.3°F | 51.4°F |
| North Vancouver | 50.2°F | 49.4°F |
| Vancouver | 50.1°F | 49.3°F |
| Nanaimo | 50.0°F | 49.8°F |
| Tofino | 49.6°F | 49.5°F |
| Victoria | 48.0°F | 47.5°F |
| Windsor | 45.1°F | 44.0°F |
| Niagara Falls | 40.3°F | 37.8°F |
| Montreal | 39.9°F | 39.5°F |
| Saint Andrews | 39.4°F | 39.0°F |
| Niagara-on-the-Lake | 39.3°F | 37.8°F |
| Hamilton | 38.2°F | 39.4°F |
| Kingston | 38.1°F | 38.8°F |
| Lunenburg | 38.1°F | 38.5°F |
| Oshawa | 37.9°F | 39.6°F |
| Halifax | 37.7°F | 37.5°F |
| Quebec | 37.7°F | 35.3°F |
| Saint John | 37.5°F | 37.1°F |
| Mississauga | 37.3°F | 39.2°F |
| Toronto | 37.0°F | 38.8°F |
Best time for vacation in Thunder Bay
Thunder Bay on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Thunder Bay
Local time: 15:45
May 17, sunday
1800
54°F
W
11 mph
11 mph
2100
50°F
W
6 mph
6 mph
May 18, monday
0000
46°F
W
7 mph
7 mph
0300
41°F
W
9 mph
9 mph
0600
43°F
W
9 mph
9 mph
0900
43°F
S
9 mph
9 mph
1200
50°F
SW
6 mph
6 mph
1500
52°F
SW
6 mph
6 mph
