On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

UV Index

Plots of today's UV index are available in graphical form for Auckland, Wellington, Christchurch, Lauder and Invercargill.

The UV index (UVI) is a standard measurement of erythemal (sun-burn causing) UV intensity that gives a more objective measure than the old “time to burn” (which cannot account for skin tone). The scale is open-ended, but a UVI of greater than 10 is extreme and a UVI of less than 3 is low. For clear skies, the UVI depends mainly on the sun elevation angle and the ozone amount

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Service type: Graphics / Interpretation / Visualisation