UV Index Today in Carlsbad, 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.

Carlsbad's UV Climate

Carlsbad stretches along seven miles of north San Diego County coastline, a beach town in the fullest sense — surfers at Tamarack and Ponto, lagoon paddlers, and Legoland's all-day outdoor crowds share a climate engineered for maximum time outside. The mild coastal air is the classic Southern California trap: 72-degree beach days carry very high UV with none of the heat that would normally warn people off the midday sun.

Average Annual UV Index

7.3

Peak UV Season

April - October

Sunny Days per Year

263

Typical UV Index by Season in Carlsbad

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 (3-5) 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 San Diego County:

UV and Weather in San Diego County

Learn about San Diego 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

Carlsbad's coastal Mediterranean climate keeps temperatures in a narrow, comfortable band year-round while UV follows the sun: midday values of 8-10 in summer, and moderate readings persisting through winter. The marine layer pattern — 'May Gray' and 'June Gloom' — shades mornings in late spring but typically burns off before the peak window, and thin coastal overcast still passes a majority of UV.

UV Index and Health Impact

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

  • Summer: Very High (8-10)
  • Spring/Fall: High (6-8)
  • Winter: Moderate (3-5)
  • 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

Most of the year, mornings begin with low cloud that clears to brilliant afternoons; the burn-off timing lands the clearest sky right on the 11 AM to 2 PM UV peak. Beach exposure stacks direct sun with reflection off water and sand, and wetsuit-clad surfers still burn their faces, ears, and hands during long sessions. Winter days are frequently clear and mild, keeping the beach and the flower fields busy under a moderate midday sun.

Frequently Asked Questions About UV in Carlsbad

What is the UV index in Carlsbad today?

The live UV index for Carlsbad, 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 Carlsbad?

UV radiation is strongest between 10 AM and 4 PM. Carlsbad'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 Carlsbad?

Summer days in Carlsbad typically reach Very High (8-10). Spring and fall usually bring High (6-8), while winter values are typically Moderate (3-5).

Do I need sunscreen in Carlsbad during winter?

Yes — Carlsbad's winter beach days reach moderate midday UV with extra reflection off the water, so surfers and beach walkers should keep sunscreen in rotation.

How sunny is Carlsbad compared to other cities?

Carlsbad averages about 263 sunny days per year with an average annual UV index around 7.3.