Current sea water temperature:
+57.7°F
| Minimum sea water temperature in June: | 64.8°F |
| Maximum sea water temperature in June: | 39.2°F |
| Average sea water temperature in June: | 53.0°F |
| more information | |
14 days
forecast
forecast
| Duluth |
monthly
weather
weather
| Duluth |
Sea water temperature for the last 10 days:
| June 26 | 57.7°F | June 21 | 51.1°F |
| June 25 | 58.5°F | June 20 | 48.9°F |
| June 24 | 59.2°F | June 19 | 49.6°F |
| June 23 | 56.7°F | June 18 | 50.9°F |
| June 22 | 53.8°F | June 17 | 49.3°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
July
July
| Duluth |
Best time for vacation in Duluth
Duluth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Duluth
Local time: 17:15
June 26, friday
1800
70°F
SW
9 mph
9 mph
2100
64°F
SW
8 mph
8 mph
June 27, saturday
0000
54°F
SW
6 mph
6 mph
0300
52°F
W
6 mph
6 mph
0600
52°F
W
7 mph
7 mph
0900
57°F
W
7 mph
7 mph
1200
63°F
W
7 mph
7 mph
1500
63°F
W
10 mph
10 mph
