Current sea water temperature:
+35.1°F
| Minimum sea water temperature in February: | 45.7°F |
| Maximum sea water temperature in February: | 31.5°F |
| Average sea water temperature in February: | 39.8°F |
| more information | |
14 days
forecast
forecast
| Dewey Beach |
monthly
weather
weather
| Dewey Beach |
Sea water temperature for the last 10 days:
| February 26 | 35.1°F | February 21 | 35.2°F |
| February 25 | 34.3°F | February 20 | 34.9°F |
| February 24 | 35.6°F | February 19 | 32.4°F |
| February 23 | 35.2°F | February 18 | 32.0°F |
| February 22 | 35.2°F | February 17 | 31.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Dewey Beach?
Based on the data about daily sea water temperature for the last three years the warmest sea in Dewey Beach was noticed in July, August and September.
Monthly Sea Temperatures in Dewey Beach, °F
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 77.6°F. The highest and lowest sea temperatures during the month were 80.1°F and 74.5°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 76.4°F. The highest and lowest sea temperatures during the month were 82.2°F and 74.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 72.6°F. The highest and lowest sea temperatures during the month were 74.8°F and 70.9°F.
current
weather
weather
| Dewey Beach |
weather in
March
March
| Dewey Beach |
Best time for vacation in Dewey Beach
Dewey Beach on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Dewey Beach
Local time: 16:24
February 26, thursday
1800
39°F
SW
11 mph
11 mph
2100
37°F
SW
7 mph
7 mph
February 27, friday
0000
36°F
SW
5 mph
5 mph
0300
36°F
SW
5 mph
5 mph
0600
32°F
SW
6 mph
6 mph
0900
30°F
W
6 mph
6 mph
1200
34°F
W
6 mph
6 mph
1500
36°F
W
6 mph
6 mph
