Rehoboth Beach Water Temperature
Sea-surface temperature at Rehoboth Beach, Delaware · times in EDT
Updated 7:03 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 |
|---|---|---|---|
| Fri, Aug 28 | 80° / 71° | 5 | 27% |
| Sat, Aug 29 | 78° / 70° | 6 | 2% |
| Sun, Aug 30 | 85° / 69° | 7 | 4% |
| Mon, Aug 31 | 87° / 72° | 6 | 7% |
| Tue, Sep 1 | 91° / 74° | 6 | 13% |
| Wed, Sep 2 | 94° / 75° | 7 | 19% |
| Thu, Sep 3 | 98° / 78° | 7 | 19% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is Rehoboth Beach warm enough to swim?
At 74°F, the water at Rehoboth Beach is comfortable. 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 August average of 74°F for this beach.
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 75°F in July and dropping to about 42°F in February.
Frequently asked questions
How warm is the water at Rehoboth Beach right now?
The sea-surface temperature is about 74°F. That is right on the August average of 74°F for this beach.
When is the water warm enough to swim at Rehoboth Beach?
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 75°F in July and dropping to about 42°F in February.
What is the warmest the water gets at Rehoboth Beach?
Around 75°F in July, based on 2023–2025 records. The coolest month is February at roughly 42°F.