Current sea water temperature:
+41.2°F
| Minimum sea water temperature in March: | 50.5°F |
| Maximum sea water temperature in March: | 36.1°F |
| Average sea water temperature in March: | 44.8°F |
| more information | |
14 days
forecast
forecast
| Bethany Beach |
monthly
weather
weather
| Bethany Beach |
Sea water temperature for the last 10 days:
| March 18 | 41.2°F | March 13 | 41.0°F |
| March 17 | 41.5°F | March 12 | 41.7°F |
| March 16 | 41.0°F | March 11 | 42.1°F |
| March 15 | 40.3°F | March 10 | 41.4°F |
| March 14 | 39.6°F | March 9 | 38.3°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
March
March
| 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: 18:48
March 18, wednesday
2100
34°F
NW
9 mph
9 mph
March 19, thursday
0000
34°F
NW
9 mph
9 mph
0300
36°F
NW
7 mph
7 mph
0600
36°F
NW
5 mph
5 mph
0900
39°F
NW
6 mph
6 mph
1200
41°F
NW
6 mph
6 mph
1500
43°F
NW
11 mph
11 mph
1800
43°F
N
11 mph
11 mph
