Bethany Beach Water Temperature
Sea-surface temperature at Bethany Beach, Delaware · times in EDT
Updated 4:00 AM EDT
How it compares today
Water temperature through the year
Monthly normals computed from 2023–2025 daily sea-surface temperature history.
Nearby water right now
7-day outlook
| Day | Air high / low | Max UV | Rain |
|---|---|---|---|
| Tue, Oct 13 | 73° / 57° | 5 | 4% |
| Wed, Oct 14 | 86° / 65° | 5 | 5% |
| Thu, Oct 15 | 72° / 62° | 5 | 22% |
| Fri, Oct 16 | 81° / 55° | 5 | 44% |
| Sat, Oct 17 | 55° / 44° | 5 | 23% |
| Sun, Oct 18 | 57° / 40° | 5 | 2% |
| Mon, Oct 19 | 63° / 47° | 4 | 2% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is Bethany Beach warm enough to swim?
At 67°F, the water at Bethany Beach is cool but swimmable. Most swimmers are comfortable without a wetsuit above 72°F; below 62°F, cold-water shock becomes a real risk for unprotected swimmers.
That is right on the October average of 67°F for this beach.
The water averages above 70°F in June, July, August and September — 4 months of the year — peaking around 78°F in July and dropping to about 43°F in January.
Frequently asked questions
How warm is the water at Bethany Beach right now?
The sea-surface temperature is about 67°F. That is right on the October average of 67°F for this beach.
When is the water warm enough to swim at Bethany Beach?
The water averages above 70°F in June, July, August and September — 4 months of the year — peaking around 78°F in July and dropping to about 43°F in January.
What is the warmest the water gets at Bethany Beach?
Around 78°F in July, based on 2023–2025 records. The coolest month is January at roughly 43°F.