Current sea water temperature:
+53.8°F
| Minimum sea water temperature in April: | 56.5°F |
| Maximum sea water temperature in April: | 45.9°F |
| Average sea water temperature in April: | 50.9°F |
| more information | |
14 days
forecast
forecast
| Dewey Beach |
monthly
weather
weather
| Dewey Beach |
Sea water temperature for the last 10 days:
| April 29 | 53.8°F | April 24 | 54.1°F |
| April 28 | 52.9°F | April 23 | 53.2°F |
| April 27 | 53.2°F | April 22 | 53.2°F |
| April 26 | 53.6°F | April 21 | 53.4°F |
| April 25 | 52.9°F | April 20 | 54.1°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
May
May
| 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: 08:27
April 29, wednesday
0900
54°F
N
11 mph
11 mph
1200
55°F
NW
15 mph
15 mph
1500
57°F
N
19 mph
19 mph
1800
55°F
N
16 mph
16 mph
2100
55°F
N
13 mph
13 mph
April 30, thursday
0000
55°F
N
13 mph
13 mph
0300
55°F
N
11 mph
11 mph
0600
57°F
NE
11 mph
11 mph
