San Clemente Beach Water Temperature
Sea-surface temperature at San Clemente Beach, California · times in PDT
Updated 1:00 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 |
|---|---|---|---|
| Tue, Oct 13 | 70° / 55° | 6 | 3% |
| Wed, Oct 14 | 76° / 59° | 6 | 0% |
| Thu, Oct 15 | 88° / 68° | 6 | 0% |
| Fri, Oct 16 | 91° / 74° | 6 | 0% |
| Sat, Oct 17 | 87° / 76° | 6 | 0% |
| Sun, Oct 18 | 82° / 72° | 6 | 0% |
| Mon, Oct 19 | 77° / 67° | 6 | 1% |
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 73°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 6° above the October average of 67°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 73°F. That is 6° above the October average of 67°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.