UV Index in San Antonio Today — Check Current UV Levels in San Antonio, Texas
Current UV Index in San Antonio
0.1 Low
Low risk. Enjoy being outdoors.
Updated at 2:15 AM local time · Data from Open-Meteo
Check the real-time UV index in San Antonio right now. Get the current UV level, hourly UV forecast for today, and a 7-day UV outlook for San Antonio, Texas. Our free UV checker helps you know exactly when sun protection is needed before heading outdoors.
Current UV Index in San Antonio
The UV index in San Antonio changes throughout the day, typically peaking between 10am and 2pm local time. Use our interactive tool above to check the current level. South Texas location with long hot summers and consistently high UV
Hourly UV Forecast for San Antonio Today
Planning outdoor activities in San Antonio, Texas? Check our hourly UV breakdown to find the safest windows. Morning hours before 10am and late afternoon after 4pm generally have the lowest UV levels. Our forecast updates every 15 minutes with data from Open-Meteo weather services.
7-Day UV Forecast for San Antonio
Plan your week in San Antonio with our 7-day UV index forecast. See which days will have the highest UV so you can schedule outdoor activities accordingly and prepare with the right level of sun protection.
Sun Protection Guide for San Antonio
| UV Index | Level | What to Do in San Antonio |
|---|---|---|
| 0–2 | Low | Enjoy outdoor activities freely. Sunscreen optional for most skin types. |
| 3–5 | Moderate | Wear SPF 30+ sunscreen. Seek shade during midday hours in San Antonio. |
| 6–7 | High | Limit midday sun exposure. Use SPF 50+, wear a hat and sunglasses. |
| 8–10 | Very High | Minimize outdoor time between 10am–4pm. Full sun protection essential. |
| 11+ | Extreme | Avoid direct sun exposure. Stay indoors or in full shade during peak hours. |
Typical UV Levels in San Antonio
San Antonio typically experiences UV index values of 10–12 during peak season (May–September) and 3–5 during the off-season. UV follows a clear seasonal curve peaking in midsummer
Best Time for Outdoor Activities in San Antonio
The safest time for outdoor activities in San Antonio is before 10am and after 4pm when UV levels drop significantly. From late spring through early fall, midday UV can reach very high or extreme levels. Always check the current UV index before extended outdoor plans.
Recommended SPF for San Antonio
During peak UV season in San Antonio (May–September), dermatologists recommend SPF 50+ broad-spectrum sunscreen. Apply 15–20 minutes before sun exposure and reapply every 2 hours — or immediately after swimming or sweating. During lower UV months, SPF 30 is typically sufficient for most skin types.
San Antonio UV Index by Season
High UV Season in San Antonio
UV levels in San Antonio are highest from late spring through early fall, with the UV index regularly reaching 10–12. During this period, unprotected fair skin can burn in as little as 10–15 minutes. Protective clothing, wide-brim hats, and UV-blocking sunglasses are recommended alongside sunscreen.
Low UV Season in San Antonio
UV levels in San Antonio drop during the mild winter months, typically measuring 3–5 on the UV index scale. While the burn risk is lower, UV radiation still reaches the surface — especially on clear days. SPF 30 is recommended for extended outdoor time even during the cooler months.
Recommended Sun Protection
- EltaMD UV Clear SPF 46 — #1 face sunscreen for daily protection. $37
- Supergoop! Glowscreen SPF 40 — Tinted primer with UV protection. $22
- Neutrogena Ultra Sheer SPF 70 — Budget body sunscreen. $10
- Banana Boat Light As Air SPF 50 — Lightweight twin pack. $15
- Roadbox UPF 50+ Sun Shirt — UV protective clothing. $19
- Outdoor Research Sombriolet Hat — UPF 50+ sun hat. $45
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Sun Safety FAQ for San Antonio
What is the average UV index in San Antonio?
The average UV index in San Antonio ranges from 3–5 during the low season to 10–12 during peak months (May–September). Year-round averages depend on season, cloud cover, and time of day.
When is UV highest in San Antonio?
UV is highest in San Antonio from late spring through early fall, peaking between 10am and 2pm local time. The strongest UV months are typically May–September.
Do I need sunscreen in San Antonio?
Yes — whenever the UV index reaches 3 or higher in San Antonio, the World Health Organization recommends sun protection. During peak season (May–September), daily sunscreen use is strongly advised for all skin types.
UV Index Near San Antonio
Check UV levels in cities near San Antonio:
UV Index in Other Cities
About UV Index in San Antonio
The UV index in San Antonio, Texas is influenced by latitude, altitude, season, cloud cover, and ozone layer thickness. UV radiation reflects off water, sand, snow, and concrete — increasing exposure even in shaded areas. Always check the current UV index before spending extended time outdoors in San Antonio. Data is updated every 15 minutes via Open-Meteo weather services.
Disclaimer: UV index data, sunburn estimates, and sun protection recommendations for San Antonio are approximate and for informational purposes only — not medical advice. Actual conditions vary based on local weather, altitude, and surface reflection. Consult a healthcare professional for personalized sun protection guidance.