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UV Index Forecast
UV Radiation Information

Hong Kong Observatory has launched a new Ultraviolet (UV) Radiation Information Webpage in August 2018.  This webpage will be decommissioned on 31 October 2018.
Go to:
New UV Radiation Information Webpage (desktop version)
New UV Radiation Information Webpage (mobile version)
UV index forecast
UV index forecast for today / tomorrow

Forecast of maximum UV Index for tomorrow will be available after 5:00 p.m.

UV index for today

Points to Note:
  • The Observatory issues an UV index forecast for the next day at 5:00 p.m. every day. The forecast will be updated as necessary in case of weather changes, till 10:00 a.m. the next day.
Last revision date: <16 Dec 2018>