Average sea water temperature in May:
+44.6°F
| Minimum sea water temperature in May: | 51.4°F |
| Maximum sea water temperature in May: | 39.4°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 42.6°F. The highest and lowest sea temperatures during the month were 44.6°F and 39.6°F.
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Monthly sea water temperature in Saint John, °F
Which Canada resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Surrey | 57.3°F | 56.6°F |
| Nanaimo | 56.6°F | 54.8°F |
| North Vancouver | 56.3°F | 55.9°F |
| Vancouver | 56.1°F | 55.7°F |
| Montreal | 53.3°F | 56.6°F |
| Tofino | 52.6°F | 52.0°F |
| Windsor | 51.4°F | 55.6°F |
| Victoria | 49.8°F | 48.9°F |
| Niagara Falls | 46.1°F | 48.9°F |
| Quebec | 46.0°F | 48.0°F |
| Kingston | 44.9°F | 48.0°F |
| Summerside | 44.5°F | 47.2°F |
| Charlottetown | 44.3°F | 45.5°F |
| Niagara-on-the-Lake | 44.3°F | 48.1°F |
| Lunenburg | 43.9°F | 46.2°F |
| Barrie | 43.1°F | 45.2°F |
| Saint Andrews | 43.1°F | 44.8°F |
| Hamilton | 42.6°F | 47.0°F |
| Saint John | 42.6°F | 42.9°F |
| Prince Edward Island | 42.4°F | 43.4°F |
Best time for vacation in Saint John
Saint John on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Saint John
Local time: 17:08
May 17, sunday
1800
73°F
SE
12 mph
12 mph
2100
61°F
SE
11 mph
11 mph
May 18, monday
0000
50°F
SE
7 mph
7 mph
0300
43°F
SE
5 mph
5 mph
0600
41°F
SE
5 mph
5 mph
0900
52°F
SE
7 mph
7 mph
1200
59°F
SE
6 mph
6 mph
1500
61°F
NE
9 mph
9 mph
