Max today · 14:00 — UV 6 · High
- Seek shade during midday hours
- Wear a shirt, apply broad-spectrum sunscreen, and put on a hat
- Wear UV-blocking sunglasses
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26°84%528°82%129°78%130°78%0Sun & moon in Tampa
The curve traces the sun's height above the horizon through the day: 0° is the horizon, 90° is straight overhead. The higher the sun climbs, the shorter the path its rays take through the atmosphere — and the stronger the UV. The part below 0° is night.
Detailed hourly UV index — Today, Jul 4
Peak UV 6.5 at 14:00 · Tampa · Local time (EDT)
The solid line is the hourly UV forecast: the UV index expected each hour, with cloud cover taken into account. The dashed line is the clear-sky UV, the level it would reach under a cloudless sky. The gap between the two lines shows how much the clouds are lowering the UV.
Detailed hourly UV index — Tomorrow, Jul 5
Peak UV 7.5 at 13:00 · Tampa · Local time (EDT)
Hour-by-hour UV index for today & tomorrow
Detailed hour-by-hour UV index forecast for Tampa — today and tomorrow. Includes UV level, clear-sky UV, weather conditions, and temperature for each hour.
Today — Jul 4
| Hour | UV | Clear sky | Weather |
|---|---|---|---|
| 05:00 | 0.0 – Low | 0.0 |  25° |
| 06:00 | 0.0 – Low | 0.0 | 25° |
| 07:00 | 0.1 – Low | 0.1 | 25° |
| 08:00 | 0.6 – Low | 0.6 | 26° |
| 09:00 | 1.8 – Low | 1.9 | 29° |
| 10:00 | 3.9 – Moderate | 4.1 | 31° |
| 11:00 | 5.7 – High | 6.7 | 31° |
| 12:00 | 5.3 – Moderate | 9.0 | 32° |
| 13:00 | 6.2 – High | 10.3 | 32° |
| 14:00 | 6.5 – High | 10.1 | 28° |
| 15:00 | 6.5 – High | 8.7 | 26° |
| 16:00 | 4.7 – Moderate | 6.3 | 28° |
| 17:00 | 2.3 – Low | 3.7 | 29° |
| 18:00 | 0.6 – Low | 1.7 | 30° |
| 19:00 | 0.2 – Low | 0.5 | 32° |
| 20:00 | 0.1 – Low | 0.1 | 30° |
| 21:00 | 0.0 – Low | 0.0 | 29° |
Tomorrow — Jul 5
| Hour | UV | Clear sky | Weather |
|---|---|---|---|
| 05:00 | 0.0 – Low | 0.0 | 26° |
| 06:00 | 0.0 – Low | 0.0 | 25° |
| 07:00 | 0.1 – Low | 0.1 | 25° |
| 08:00 | 0.6 – Low | 0.6 | 25° |
| 09:00 | 1.7 – Low | 2.0 | 26° |
| 10:00 | 3.4 – Moderate | 4.2 | 27° |
| 11:00 | 5.5 – Moderate | 6.9 | 28° |
| 12:00 | 6.5 – High | 9.3 | 29° |
| 13:00 | 7.5 – Very High | 10.6 | 30° |
| 14:00 | 7.2 – High | 10.5 | 24° |
| 15:00 | 5.3 – Moderate | 9.0 | 26° |
| 16:00 | 3.3 – Moderate | 6.6 | 26° |
| 17:00 | 2.0 – Low | 3.9 | 26° |
| 18:00 | 1.3 – Low | 1.8 | 29° |
| 19:00 | 0.4 – Low | 0.5 | 30° |
| 20:00 | 0.1 – Low | 0.1 | 30° |
| 21:00 | 0.0 – Low | 0.0 | 30° |
4-Day UV Forecast for Tampa
The 4-day UV index forecast shows each day's peak UV and the time it's reached, plus daily high and low temperatures and an hourly UV curve, so you can plan sun protection for the days ahead.
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33°1534°1833°27°929°1233°1534°1834°UV in Tampa today
Right now Tampa is at UV 0 (low), with the day's high of 6 (high) due around 14:00, so sun protection pays off from 10:00 to 17:00. Cloud takes some of the edge off, holding the peak to UV 6 against a clear-sky 10. It strengthens tomorrow, topping out around 8 (very high). It's summer, with the sun high and UV near its strongest for the year.The sun rises at 06:38 and sets at 20:30. Below you'll find the current sun and sky conditions, daylight hours, and the key geographic facts that shape UV exposure in Tampa.
About Tampa
Tampa is a leading city of Florida's Gulf Coast and the seat of Hillsborough County, with Tampa Bay forming part of its southern and western borders. The subtropical climate means UV is high year-round; the strongest levels come from March through June when the sun angle is steep and afternoon thunderstorms have not yet set in daily. Waterfront and beach environments increase UV exposure through reflection.
Key facts
Sun & Daylight Hours in Tampa
17:00–20:00
Seasonal daylight range at this latitude
Similar daylight hours as Delhi, India — on the same parallel
UV index map for Tampa and nearby cities
Check UV in: Palm Bay · Gainesville · Lakeland · Port Saint Lucie · Orlando
Air quality concerns? Check air quality in Tampa on AirIndex.Today
What is the UV index in Tampa right now?
As of 01:00 local time, the UV index in Tampa is 0 (Low). UV changes hour by hour — see the hourly chart above for how it rises and falls today.
What is the UV index in Tampa today?
On 2026-07-04, the peak UV index forecast for Tampa is 6, expected around 14:00 local time. Check back daily — UV levels change with cloud cover, ozone, and sun angle.
What is the UV index in Tampa tomorrow?
On 2026-07-05, the UV index in Tampa is forecast to peak at 8 around 13:00 local time. Plan outdoor activities and sun protection around that peak.
Forecast · UV Index
- Now
- UV 0 (Low)
- Max today
- UV 6.5 · 14:00
- Max tomorrow
- UV 7.5 · 13:00
- Clear sky
- UV 10.3
- Sunrise / Sunset
- 06:38 / 20:30
- High UV window (UV ≥ 3)
- 10:00–17:00
- 4-Day UV Forecast
- Sat 6.5 · Sun 7.5 · Mon 8.6 · Tue 9.2
UV guides
Read all guides →- What Is a Safe UV Index, and What Counts as Dangerous?What every number on the scale means, per WHO
- When Is UV Strongest? Hour-by-Hour UV Patterns WorldwideWhy the strongest summer UV isn't at the equator
- What Affects the UV Index? 7 Key Factors ExplainedSolar angle, altitude, ozone, clouds and more
- Does UV Go Through Clouds, Windows, and Water?How much UV gets through cloud, glass and water
- UV Index Official Sources and ResourcesWhere the data and guidelines come from
About the UV Index
What is the UV index?
The UV index (UVI) is an international standard measure of the strength of ultraviolet radiation from the sun at a particular place and time. It ranges from 0 (nighttime) to 11+ (extreme). Higher values mean greater risk of sunburn, skin damage, and eye injury. The UV index was developed by the World Health Organization (WHO) to help people protect themselves from harmful UV radiation.
How do I check the UV index today?
This page shows the live UV index for your location using data from the Copernicus Atmosphere Monitoring Service (CAMS). You get the current UV level, an hourly UV forecast chart for today and tomorrow, and the exact peak UV time — so you always know when sun protection is most important.
When is UV radiation strongest?
UV radiation is typically strongest between 10:00 and 16:00, when the sun is highest in the sky. However, the exact peak time and intensity depend on your latitude, the season, altitude, cloud cover, and ozone levels. Check the UV forecast chart above to see today's exact peak time for your location.
How can I protect myself from UV radiation?
Apply broad-spectrum sunscreen, wear protective clothing and a wide-brimmed hat, seek shade during peak UV hours, and wear UV-blocking sunglasses. The WHO recommends sun protection when the UV index is 3 or above.
Where does the UV data come from?
The hourly UV index on this site comes from the Copernicus Atmosphere Monitoring Service (CAMS), operated by ECMWF on behalf of the European Union. CAMS calculates the UV biologically effective dose using total column ozone, aerosol optical depth, and cloud cover. The global forecast has a spatial resolution of approximately 45 km and provides hourly UV index values for up to 5 days ahead.
What does "clear-sky UV index" mean?
The clear-sky UV index shows how strong ultraviolet radiation would be if there were no clouds at all. It is calculated using the same atmospheric data — ozone column thickness, aerosol concentrations, and solar angle — but assumes completely cloudless conditions. Comparing the actual UV index with the clear-sky value shows how much clouds are reducing UV exposure at any given time. On overcast days, actual UV can be significantly lower than the clear-sky value.
How often is the UV forecast updated?
The CAMS global UV forecast is updated twice daily, based on model runs initialized at 00:00 and 12:00 UTC. Weather data such as temperature, cloud cover, and sunrise/sunset times is updated every 1–6 hours depending on the region, using weather models from national meteorological services via Open-Meteo. The first 1–2 days of the forecast are typically the most accurate.
What does the WHO recommend for each UV level?
Source: WHO Global Solar UV Index, 2002
