The NIWA Weather app gives forecasts out to six days and 48-hour UV forecasts. You can view the UV forecasts with or without cloud cover using a simple toggle and the forecast gives you recommendations about sun protection needed.
NIWA's Atmospheric Research Station at Lauder in Central Otago specialises in measuring CFCs, ozone, UV levels and greenhouse gases and has a wide range of world-class instruments and research scientists.
The UV Index is a measure of the intensity of UV radiation. The larger the number, the more intense the UV. In New Zealand, its maximum summer value is generally about 12, but it can exceed 13 in the far North. In winter it reaches peak values of 1 or 2. Values of 10 or more should be considered as "extreme". At high altitude tropical sites (eg Mauna Loa Observatory, Hawaii), the UV Index can exceed 20. The UV Index supersedes the idea of "Time to Burn" or "Burn Time", which has been used previously in New Zealand.
Despite the small size of this year’s ozone hole, scientists cannot yet say whether this ozone hole season marks the start of a sustained recovery of the Antarctic ozone layer or just year-to-year variation.