United States
UV Index in Puerto Rico — Current UV Levels
Check the current UV index for 1 cities in Puerto Rico. Select a city below for real-time UV data, hourly forecasts, and sun protection advice.
UV Index by City in Puerto Rico
Sun Safety in Puerto Rico
UV levels in Puerto Rico vary by season, altitude, and proximity to water. The WHO recommends sun protection whenever UV reaches 3 or higher. Apply SPF 30+ before outdoor activities and reapply every 2 hours.
UV Index in Puerto Rico: What to Know
Puerto Rico sees UV levels that vary by season, with the strongest sun in midsummer.
Across Puerto Rico, the UV index peaks in the four hours around solar noon (roughly noon to 3 PM local time). The World Health Organization recommends sun protection whenever the UV index reaches 3 or higher: apply broad-spectrum SPF 30 at UV 3–5, SPF 50 at UV 6–7, and SPF 50+ with reapplication every two hours at UV 8 and above. Check the live, hour-by-hour UV index for San Juan on the city pages above before heading outdoors.
Common Questions About UV in Puerto Rico
When is the UV index highest in Puerto Rico?
UV in Puerto Rico is strongest between noon and 3 PM local time, and highest in the summer months when the sun sits highest in the sky. Check the hourly chart for San Juan above to see today's exact peak.
Do I need sunscreen in Puerto Rico?
Yes — whenever the UV index reaches 3 or higher, which in Puerto Rico covers most of the daytime hours from spring through fall. Even on cloudy days, up to 80% of UV can reach the ground.
How accurate is this UV data for Puerto Rico?
Our UV index for Puerto Rico comes from Open-Meteo, which aggregates national weather-service models, and updates every 15 minutes. Levels follow the official WHO global solar UV index scale.