Myrtle Beach Water Temperature
Sea-surface temperature at Myrtle Beach, South Carolina · times in EDT
Updated 9:00 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 |
|---|---|---|---|
| Fri, Aug 28 | 83° / 73° | 7 | 19% |
| Sat, Aug 29 | 81° / 75° | 2 | 38% |
| Sun, Aug 30 | 89° / 75° | 8 | 21% |
| Mon, Aug 31 | 91° / 75° | 8 | 11% |
| Tue, Sep 1 | 92° / 76° | 8 | 5% |
| Wed, Sep 2 | 94° / 77° | 7 | 5% |
| Thu, Sep 3 | 98° / 78° | 7 | 10% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is Myrtle Beach warm enough to swim?
At 85°F, the water at Myrtle Beach is warm — great for swimming. 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 85°F for this beach.
The water averages above 70°F in May, June, July, August, September and October — 6 months of the year — peaking around 87°F in July and dropping to about 50°F in January.
Frequently asked questions
How warm is the water at Myrtle Beach right now?
The sea-surface temperature is about 85°F. That is right on the August average of 85°F for this beach.
When is the water warm enough to swim at Myrtle Beach?
The water averages above 70°F in May, June, July, August, September and October — 6 months of the year — peaking around 87°F in July and dropping to about 50°F in January.
What is the warmest the water gets at Myrtle Beach?
Around 87°F in July, based on 2023–2025 records. The coolest month is January at roughly 50°F.