UV Index Today in Santa Barbara, California

Current UV
Today's Max

Hourly UV Forecast

low moderate high very high extreme

Surface Type

Reflective surfaces increase your UV exposure — snow reflects up to 90%, sand about 20%.

Safe Exposure Time

Estimated burn times based on the Fitzpatrick scale for skin color and today's maximum UV index of . Tap your skin type:

Very fair skin, always burns, never tans

Time until burn
With SPF 15*
With SPF 30*

*Assumes proper application of broad-spectrum sunscreen with reapplication every 2 hours. Estimates follow WHO guidance and satellite-derived data — see how our data works.

Sun Times

Dawn
Sunrise
Solar Noon
Sunset
Dusk
Day Length
Morning Golden Hour Ends
Evening Golden Hour

Important Safety Information

General Guidelines

These exposure times are estimates based on scientific research and should be used as general guidelines only. Individual responses to UV exposure may vary.

Affecting Factors

UV exposure is affected by: time of day, season, altitude, cloud cover, reflection from surfaces, and individual skin sensitivity.

Protection Tips

Seek shade during peak UV hours (10 AM - 4 PM), wear protective clothing, use broad-spectrum sunscreen, and monitor the UV index regularly.

Medical Advice

Consult a healthcare provider for personalized sun protection advice, especially if you have a history of skin conditions or take medications that increase sun sensitivity.

Santa Barbara's UV Climate

Santa Barbara's unusual south-facing coastline — the beaches look toward the sun across the Santa Barbara Channel — combines with the Santa Ynez Mountains at its back to create the celebrated 'American Riviera' microclimate. That means beach weather most of the year and steady UV exposure for a population that lives outdoors: East Beach volleyball, harbor sailing, and mountain trails that climb quickly into thinner, higher-UV air.

Average Annual UV Index

7.2

Peak UV Season

April - October

Sunny Days per Year

283

Typical UV Index by Season in Santa Barbara

Season Typical Midday UV Protection Needed
Summer Very High (8-10) SPF 30+, hat, sunglasses; shade from 10 AM – 4 PM
Spring & Fall High (6-8) SPF 30+ for extended time outdoors
Winter Moderate (3-4) Sunscreen for long midday exposure; more on snow

UV Index in Nearby Cities

Practical Tips for Outdoor Activities

Make the most of outdoor activities while staying safe in Santa Barbara County:

UV and Weather in Santa Barbara County

Learn about Santa Barbara County's unique climate patterns, UV radiation levels, and how they affect your daily life. Enter your zip code for location-specific weather radar data and UV forecasts to help you make informed decisions about outdoor activities and sun protection.

Climate and UV Patterns

Santa Barbara's Mediterranean climate is famously mild, and that mildness disguises real UV: summer midday values reach 8-10, and the temperate air means people comfortably stay in the sun for hours longer than they would in hotter cities. May and June bring morning fog ('May Gray, June Gloom') that burns off before the midday peak. Winters are gentle and often brilliant, holding moderate UV at midday.

UV Index and Health Impact

Understanding UV radiation levels is crucial for protecting your health. Typical clear-day UV index values in Santa Barbara through the year:

  • Summer: Very High (8-10)
  • Spring/Fall: High (6-8)
  • Winter: Moderate (3-4)
  • Peak UV hours: 10 AM - 4 PM
  • Cloud cover can reduce UV by 20-40%, but does not eliminate it
  • Clear skies bring maximum UV exposure

Local Weather Patterns

The marine layer is the defining local pattern — overcast dawns that typically clear from the mountains toward the sea by late morning, right on schedule for peak UV hours. Sundowner winds off the mountains bring sudden warm, crystal-clear spells with elevated UV. Beach reflection off water and sand adds to exposure year-round, and the front-country trails above town gain enough elevation to measurably strengthen the sun.

Frequently Asked Questions About UV in Santa Barbara

What is the UV index in Santa Barbara today?

The live UV index for Santa Barbara, CA is shown at the top of this page and updates throughout the day, along with today's maximum and an hourly forecast.

When is the sun strongest in Santa Barbara?

UV radiation is strongest between 10 AM and 4 PM. Santa Barbara's peak UV season runs April - October, when the midday index typically reaches Very High (8-10).

How high does the UV index get in Santa Barbara?

Summer days in Santa Barbara typically reach Very High (8-10). Spring and fall usually bring High (6-8), while winter values are typically Moderate (3-4).

Do I need sunscreen in Santa Barbara during winter?

Yes, for beach afternoons and hikes — Santa Barbara's clear winter days reach moderate midday UV, and the mild air makes long exposure easy to overlook.

How sunny is Santa Barbara compared to other cities?

Santa Barbara averages about 283 sunny days per year with an average annual UV index around 7.2.