Places / San Diego, California
UV index in San Diego, California
Check another placeLoading today’s UV…
- Low 0 to 2
- Moderate 3 to 5
- High 6 to 7
- Very high 8 to 10
- Extreme 11+
Hour-by-hour numbers
| Time | UV index | Level |
|---|
The next few days
Each day’s UV curve and peak, drawn on the same scale so you can compare. The forecast reaches roughly four days ahead.
What to do today
About San Diego
San Diego’s bayside paths, beaches and open parks invite long outdoor days. The forecast point is downtown; coastal cloud can look different from conditions a few miles inland.
When to check the UV here
A marine layer can make the morning seem dim before the sky clears. Check the hours around your outing instead of relying on the weather when you woke up. A cool ocean breeze is a comfort cue, not a UV reading.
Planning your time outside
Keep a cover-up with your beach bag and plan a shaded break for an afternoon by the water. Recheck the forecast if a short walk turns into a full day outdoors.
How to read this forecast
The chart loads hourly model data from currentuvindex.com for 32.7157, -117.1611. Times are local to this forecast point. Open Hour-by-hour numbers for the values, or compare the next few days below the main chart.
The forecast describes UV for the area, not the dose on your skin. Buildings, trees, cloud and reflective surfaces can change your exposure. It does not measure a particular beach chair, trail or street.
What time does UV drop below 3?
Read the descending side of today’s curve, then check that the later hours remain below 3. The time changes with the date and weather. See how to find the afternoon drop instead of using a fixed clock time.
What should I bring?
Plan sun protection when the forecast reaches 3 or higher. Shade, covering, a hat, sunglasses and sunscreen work together. At very high UV, arrange outdoor time around the peak rather than relying on sunscreen alone.
Nearby or similar forecasts
More places to plan
Related guides
Sources and local information
UV forecasts are model estimates and can differ from conditions on the ground. Live data requires JavaScript and a connection to the provider; no typical UV values are substituted if it fails. Page updated October 15, 2026. See how the data works.