Orange County, CA: Current UV Index and Hourly Forecast

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As of 3:08 PM PDT on July 8, 2026, out of 45 cities in Orange County, CA in our database, 35 cities (78%) have a UV Index reading of Very High, while 10 cities (22%) have a UV Index reading of High. The city with the highest UV Index reading right now is Rancho Santa Margarita, CA with a reading of 8.5.

Over the next 24 hours, the highest UV Index reading in Orange County, CA is expected to be 12.2 in Rancho Santa Margarita between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Orange County, CA

• Aliso Viejo - 7.4
• Anaheim - 8.3
• Brea - 8.3
• Buena Park - 7.6
• Costa Mesa - 7.6
• Coto de Caza - 8.2
• Cypress - 7.6
• Dana Point - 7.4
• Fountain Valley - 7.6
• Fullerton - 8.3
• Garden Grove - 7.6
• Huntington Beach - 7.6
• Irvine - 8.3
• La Habra - 8.3
• La Palma - 7.6
• Ladera Ranch - 7.4
• Laguna Beach - 7.4
• Laguna Hills - 7.4
• Laguna Niguel - 7.4
• Laguna Woods - 7.4
• Lake Forest - 8.3
• Las Flores - 8.2
• Los Alamitos - 7.6
• Midway City - 7.6
• Mission Viejo - 7.4
• Modjeska - 8.3
• Newport Beach - 7.4
• North Tustin - 8.3
• Orange - 8.3
• Placentia - 8.3
• Rancho Mission Viejo - 8.2
• Rancho Santa Margarita - 8.5
• Rossmoor - 7.6
• San Clemente - 8.2
• San Juan Capistrano - 7.4
• Santa Ana - 7.6
• Seal Beach - 7.6
• Silverado - 8.3
• Stanton - 7.6
• Trabuco Canyon - 8.5
• Tustin - 8.3
• Villa Park - 8.3
• Westminster - 7.6
• Williams Canyon - 8.3
• Yorba Linda - 8.3