Alternative low-bandwidth version Skip to main content

UV Index

The UV Index maps for Ireland display the maximum UV level forecast under either clear or cloudy sky during the day indicated. The UV Index legend and Advice chart is below.

Max UV Index - Clear Sky - Saturday, 23 Jan 2021
Max UV Index - Cloudy Sky - Saturday, 23 Jan 2021

UV Index and Advice

Index Level Advice Description
1 Low No Protection Required You can stay safely
2 Low No Protection Required
3 Moderate Protection Required Seek shade during
midday hours. Apply sunscreen and cover up with protective clothing.
4 Moderate Protection Required
5 Moderate Protection Required
6 High Protection Required
7 High Protection Required
8 Very High Extra Protection Required Avoid being outside during midday hours.
Make sure to seek shade. Always wear sunscreen and protective clothing
.i.e. Shirt, hat.
9 Very High Extra Protection Required
10 Very High Extra Protection Required
11+ Extreme Extra Protection Required

Brewer #227 at Valentia UV Index 2021-01-22
Satellite imagery at 17:15

Ultraviolet radiation (UV) is a component of sunlight. The Global Solar UV index is a scale that was developed by the World Health Organisation which measures the UV radiation level at the surface of the Earth, and gives an indication of the potential for skin damage. The graph above shows the current UV Index level as measured at Valentia Observatory Co. Kerry (time is UTC).  Further information below.

Data from the Valentia UV Index may be intermittent.
The latest visible Satellite image is the black and white version of the satellite image available here

The UV Index level for your location is included in each of our Regional Weather Forecasts during summer months.

Further Information

  • The UV index forecast for Ireland is sourced by Deutscher Wetterdienst and is included in our regional forecasts from May to September but be aware it can only be an average for any one day over the entire country. The clear/sunny sky peak UVI index is reduced by cloud cover.
  • For example when the sky is cloud free (sunny) everywhere in Ireland then the UVI for Ireland is high (7.5) in June/July between 11am and 4pm. If it is cloudy everywhere then the UVI is low to moderate (3 to 4).
  • Often however the cloud is variable from place to place and from time to time in Ireland and due to wind chill it can often feel cool in summer. Nonetheless a 20 minutes sunny interval can produce sunburn.
  • Further details on Ozone Monitoring and the Brewer spectrophotometer is here

You are here: