SunticUV index in San Diego today
San Diego's mild coastal climate brings year-round sunshine and high summer UV along its beaches. The only accurate figure is a live one for your exact spot: Suntic shows San Diego's real-time UV index and a 10-day forecast.
Sun and UV in San Diego
With gentle temperatures and frequent sun, San Diego sees UV rise to high or very high levels through summer, and meaningful UV even in the cooler months. Like much of the Southern California coast, it gets morning low cloud that can hide a strong midday sun. The pleasant sea air keeps things comfortable while UV stays significant.
When is UV highest in San Diego?
UV is highest around solar noon (broadly 10am to 4pm) and strongest across May to September. The exact peak shifts with the season and the day's weather. For more on this, see when is the sun strongest.
The UV index scale
| UV index | Risk level | What to do |
|---|---|---|
| 0-2 | Low | Minimal risk. Safe to be outside; sunglasses on bright days. |
| 3-5 | Moderate | Take care at midday. Use SPF 30+, a hat and shade around noon. |
| 6-7 | High | Protection needed. SPF 30+, cover up, seek shade 10am-4pm. |
| 8-10 | Very high | Extra protection. Avoid the sun at midday; SPF, clothing and shade are essential. |
| 11+ | Extreme | Take all precautions. Unprotected skin can burn quickly; stay inside or fully covered at peak hours. |
UV index categories follow the World Health Organization / US EPA scale.
Staying sun-safe in San Diego
- Mild, breezy weather masks high UV, so check the index before a long day at the beach or bay.
- Surf and sand reflect UV, increasing your effective exposure in the water.
- Year-round sun makes daily sunscreen a sensible habit here.
Wherever you are, the basics hold: use broad-spectrum SPF 30+, seek shade around midday, cover up, and never let your skin burn. See our sunburn prevention tips.
See San Diego's live UV index
Suntic turns the live UV index into personal safe-sun times, sunscreen reminders and vitamin D tracking on your iPhone.
