Measurements:
°C
°F
CURRENT WEATHER
13:01
Dewey Beach
60°F
SE 19 mph
Feels like: 56°F
Precip: 0%
World Resorts USA Dewey Beach Weather

7 Day Weather Forecast

05.14
thu
DAY
60°F
SE 19 mph
precip
0%
NIGHT
52°F
SE 19 mph
precip
0%
05.15
fri
DAY
58°F
SE 17 mph
precip
0%
NIGHT
58°F
E 6 mph
precip
0%
05.16
sat
DAY
66°F
N 9 mph
precip
0%
NIGHT
64°F
N 8 mph
precip
0%
05.17
sun
DAY
74°F
E 6 mph
precip
0%
NIGHT
66°F
N 7 mph
precip
85%
05.18
mon
DAY
72°F
W 6 mph
precip
0%
NIGHT
64°F
NW 10 mph
precip
26%
05.19
tue
DAY
74°F
N 12 mph
precip
0%
NIGHT
68°F
N 17 mph
precip
0%
05.20
wed
DAY
78°F
NE 13 mph
precip
0%
NIGHT
64°F
SE 9 mph
precip
100%

Dewey Beach Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Dewey Beach was 15.2°F. The maximum and minimum values were 12.0°F and 17.7°F respectively.

Dewey Beach on the Weather Map

Best Time to Visit Dewey Beach
The most sunny months:
November 18 days
October 16 days
January 14 days
The most warm months:
July 84.2 °F
August 81.5 °F
June 77.7 °F
Warmest sea temperature:
July 78.2 °F
August 77.7 °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