Current sea water temperature:
+67.8°F
| Minimum sea water temperature in June: | 79.7°F |
| Maximum sea water temperature in June: | 60.8°F |
| Average sea water temperature in June: | 67.9°F |
| more information | |
14 days
forecast
forecast
| Dewey Beach |
monthly
weather
weather
| Dewey Beach |
Sea water temperature for the last 10 days:
| June 8 | 67.8°F | June 3 | 63.3°F |
| June 7 | 66.6°F | June 1 | 63.3°F |
| June 6 | 66.4°F | May 31 | 63.5°F |
| June 5 | 64.6°F | May 30 | 62.8°F |
| June 4 | 64.2°F | May 29 | 61.7°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
June
June
| 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: 16:06
June 08, monday
1800
66°F
W
14 mph
14 mph
2100
63°F
W
12 mph
12 mph
June 09, tuesday
0000
61°F
NW
11 mph
11 mph
0300
61°F
NW
10 mph
10 mph
0600
61°F
N
7 mph
7 mph
0900
64°F
NE
7 mph
7 mph
1200
68°F
N
9 mph
9 mph
1500
70°F
N
15 mph
15 mph
