Is today a good day for sea swimming in San Diego?
Today is not the day.
Not safe for sea swimming today. A 1.4 m sea running. Out of season for it, whatever the weather does.
Not today14/100
7-day outlook for sea swimming in San Diego
Best day looks like Sunday at 35/100.
Why this score?
Data from Open-Meteo, and Open-Meteo Marine for waves and sea temperature. Last updated 21:34 UTC.
Sea swimming in San Diego, month by month
The sea is warmest in August at 22°C and coldest in February at 15°C. Offshore waves are biggest in January (the day's highest averages 1.3 m) and smallest in July (0.8 m). Daytime highs peak at 26°C in August and fall to 17°C in January. March is the wettest month, with about 11 days of 1 mm or more; July is the driest, with about 0.
Our seasonal guide puts sea swimming in season from May to October.
| Month | Sea temperature (°C) | Offshore wave height (m) | Daytime high (°C) | Rainy days (days) |
|---|---|---|---|---|
| January | 15 | 1.3 | 17 | 7 |
| February | 15 | 1.2 | 18 | 6 |
| March | 15 | 1.2 | 17 | 11 |
| April | 16 | 1.1 | 19 | 3 |
| May (in season) | 18 | 1.0 | 20 | 1 |
| June (in season) | 19 | 0.9 | 22 | 1 |
| July (in season) | 21 | 0.8 | 24 | 0 |
| August (in season) | 22 | 0.8 | 26 | 1 |
| September (in season) | 21 | 0.8 | 26 | 1 |
| October (in season) | 19 | 0.9 | 24 | 2 |
| November | 17 | 0.9 | 21 | 3 |
| December | 15 | 1.1 | 18 | 4 |
In season, by our seasonal guide
Averages of daily weather 2020 to 2024 and of waves and sea temperature 2022 to 2024, from ERA5 reanalysis data (about 25 km resolution; waves are measured offshore, not in the surf at the beach). Not a forecast.
About sea swimming in San Diego
A consistent 18°C climate, 70 miles of Pacific coast, and the closest US city to Baja's surf and diving.
Go Daisy scores 47 activities for San Diego, including running, cycling, urban exploring, photography, outdoor yoga. The score for sea swimming updates hourly from the same weather data professional services use.
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Score for sea swimming in San Diego updated hourly. Free, ad-free. Built by independent makers in the UK and Asturias, Spain.
Weather data from Open-Meteo.