Measurements:
°C
°F
CURRENT WEATHER
17:32
Dewey Beach
78°F
N 8 mph
Feels like: 80°F
Precip: 11%
World Resorts USA Dewey Beach Weather

7 Day Weather Forecast

08.25
tue
DAY
80°F
SE 11 mph
precip
3%
NIGHT
76°F
NE 6 mph
precip
5%
08.26
wed
DAY
76°F
NW 8 mph
precip
13%
NIGHT
78°F
N 19 mph
precip
18%
08.27
thu
DAY
76°F
N 16 mph
precip
77%
NIGHT
76°F
NE 10 mph
precip
13%
08.28
fri
DAY
80°F
NW 4 mph
precip
23%
NIGHT
78°F
E 6 mph
precip
27%
08.29
sat
DAY
76°F
SW 12 mph
precip
23%
NIGHT
78°F
W 9 mph
precip
16%
08.30
sun
DAY
78°F
NW 8 mph
precip
13%
NIGHT
80°F
E 7 mph
precip
27%
08.31
mon
DAY
78°F
E 10 mph
precip
48%
NIGHT
78°F
E 7 mph
precip
28%

Dewey Beach Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Dewey Beach was 25.3°F. The maximum and minimum values were 23.6°F and 27.2°F respectively.

Dewey Beach on the Weather Map

Best Time to Visit Dewey Beach
The most sunny months:
November 18 days
October 16 days
June 15 days
The most warm months:
July 84.1 °F
August 81.5 °F
June 77.6 °F
Warmest sea temperature:
July 78.3 °F
August 78.1 °F
September 75.6 °F
The most cold months:
January 39.5 °F
February 41.8 °F
December 45.1 °F
The most rainy months:
August 4 days
February 3 days
March 3 days
The most windy months:
March 13 mph
January 13 mph
February 12 mph
more details