Current sea water temperature:
+47.7°F
| Minimum sea water temperature in December: | 57.0°F |
| Maximum sea water temperature in December: | 41.7°F |
| Average sea water temperature in December: | 48.6°F |
| more information | |
14 days
forecast
forecast
| Bethany Beach |
monthly
weather
weather
| Bethany Beach |
Sea water temperature for the last 10 days:
| December 5 | 47.7°F | November 30 | 50.7°F |
| December 4 | 48.9°F | November 29 | 51.8°F |
| December 3 | 49.1°F | November 28 | 52.5°F |
| December 2 | 49.8°F | November 27 | 53.1°F |
| December 1 | 50.5°F | November 26 | 52.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Bethany Beach?
Based on the data about daily sea water temperature for the last three years the warmest sea in Bethany Beach was noticed in July, August and September.
Monthly Sea Temperatures in Bethany Beach, °F
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 75.6°F. The highest and lowest sea temperatures during the month were 77.9°F and 73.6°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 75.3°F. The highest and lowest sea temperatures during the month were 78.4°F and 72.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 72.7°F. The highest and lowest sea temperatures during the month were 74.7°F and 71.4°F.
current
weather
weather
| Bethany Beach |
weather in
December
December
| Bethany Beach |
Best time for vacation in Bethany Beach
Bethany Beach on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Bethany Beach
Local time: 02:50
December 05, friday
0300
36°F
SW
15 mph
15 mph
0600
36°F
SW
9 mph
9 mph
0900
36°F
SW
6 mph
6 mph
1200
37°F
SW
6 mph
6 mph
1500
39°F
S
9 mph
9 mph
1800
43°F
S
7 mph
7 mph
2100
41°F
SW
6 mph
6 mph
December 06, saturday
0000
41°F
S
9 mph
9 mph
