San Clemente Beach Water Temperature
Sea-surface temperature at San Clemente Beach, California · times in PDT
Updated 4:03 AM PDT
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 | 82° / 71° | 8 | 2% |
| Sat, Aug 29 | 82° / 70° | 8 | 2% |
| Sun, Aug 30 | 83° / 64° | 8 | 0% |
| Mon, Aug 31 | 81° / 64° | 8 | 2% |
| Tue, Sep 1 | 83° / 63° | 8 | 18% |
| Wed, Sep 2 | 84° / 68° | 8 | 17% |
| Thu, Sep 3 | 83° / 65° | 7 | 13% |
Sea-surface temperature and wave data from the Open-Meteo marine model; weather from Open-Meteo.
Is San Clemente Beach warm enough to swim?
At 76°F, the water at San Clemente 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 4° above the August average of 72°F here.
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 72°F in August and dropping to about 59°F in January.
Frequently asked questions
How warm is the water at San Clemente Beach right now?
The sea-surface temperature is about 76°F. That is 4° above the August average of 72°F here.
When is the water warm enough to swim at San Clemente Beach?
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 72°F in August and dropping to about 59°F in January.
What is the warmest the water gets at San Clemente Beach?
Around 72°F in August, based on 2023–2025 records. The coolest month is January at roughly 59°F.