Current sea water temperature:
+42.4°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: | 48.4°F |
| more information | |
14 days
forecast
forecast
| Bethany Beach |
monthly
weather
weather
| Bethany Beach |
Sea water temperature for the last 10 days:
| December 16 | 42.4°F | December 11 | 44.1°F |
| December 15 | 43.0°F | December 10 | 44.8°F |
| December 14 | 43.7°F | December 9 | 46.0°F |
| December 13 | 44.1°F | December 8 | 46.6°F |
| December 12 | 44.2°F | December 7 | 47.5°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: 09:02
December 16, tuesday
1200
37°F
SE
9 mph
9 mph
1500
41°F
E
7 mph
7 mph
1800
39°F
NE
6 mph
6 mph
2100
36°F
NE
10 mph
10 mph
December 17, wednesday
0000
37°F
NE
12 mph
12 mph
0300
37°F
NE
16 mph
16 mph
0600
37°F
NE
19 mph
19 mph
0900
39°F
NE
19 mph
19 mph
