Current sea water temperature:
+47.1°F
| Minimum sea water temperature in May: | 55.2°F |
| Maximum sea water temperature in May: | 34.2°F |
| Average sea water temperature in May: | 41.9°F |
| more information | |
14 days
forecast
forecast
| Duluth |
monthly
weather
weather
| Duluth |
Sea water temperature for the last 10 days:
| May 30 | 47.1°F | May 25 | 45.0°F |
| May 29 | 46.0°F | May 24 | 43.9°F |
| May 28 | 44.2°F | May 23 | 44.6°F |
| May 27 | 46.4°F | May 22 | 41.2°F |
| May 26 | 44.1°F | May 21 | 42.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Duluth?
Based on the data about daily sea water temperature for the last three years the warmest sea in Duluth was noticed in August, July and September.
Monthly Sea Temperatures in Duluth, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 67.5°F. The highest and lowest sea temperatures during the month were 71.1°F and 62.6°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 63.4°F. The highest and lowest sea temperatures during the month were 71.2°F and 58.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 60.7°F. The highest and lowest sea temperatures during the month were 65.1°F and 58.3°F.
current
weather
weather
| Duluth |
weather in
June
June
| Duluth |
Best time for vacation in Duluth
Duluth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Duluth
Local time: 00:24
May 31, sunday
0300
50°F
W
6 mph
6 mph
0600
50°F
SW
6 mph
6 mph
0900
52°F
W
6 mph
6 mph
1200
57°F
W
6 mph
6 mph
1500
59°F
W
7 mph
7 mph
1800
55°F
W
7 mph
7 mph
2100
48°F
SW
4 mph
4 mph
June 01, monday
0000
46°F
SW
3 mph
3 mph
