Does Half Moon Bay need sun protection in winter?

Not every day. Midwinter middays in Half Moon Bay often sit below UV 3, but clear late-winter days (from August in much of Auckland) cross the threshold before the weather feels like spring. Check the live index.

Does the water make UV worse in Half Moon Bay?

It can. Sand and water reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.

UV index in Half Moon Bay today

Half Moon Bay (AUK) is a coastal place at 36.9°S. Clear-sky summer peaks are typically 9–11 (very high to extreme), and the same UV that burns on the sand is still there on a cool, windy day. This is warm-temperate New Zealand: a long protection season from early spring through autumn, with clear winter days that can still burn.

Live reading · data by Open-Meteo · reference monitoring by ARPANSA

Today and tomorrow in Half Moon Bay

Peak UV, temperature and conditions for Half Moon Bay. Tomorrow’s peak is the number to plan around if you’re heading out in the middle of the day.

Weather conditions right now

Cloud and rain cut heat more than they cut UV. A partly cloudy beach day in Half Moon Bay can still sit at protection levels. Why you burn on cloudy days.

When Half Moon Bay needs sun protection

Sun protection is needed in Half Moon Bay typically from September through April, and any other day UV reaches 3. On the water or the sand, reflection can lift your dose even when the forecast UV already looks high.

The threshold, per SunSmart and ARPANSA: whenever UV reaches 3 or above, Slip on covering clothing, Slop on SPF 50+ sunscreen, Slap on a hat, Seek shade and Slide on sunglasses. Read the full sun safety guide.

The UV scale at a glance

0–2Low
3–5Moderate
6–7High
8–10Very high
11+Extreme

Frequently asked questions

When does Half Moon Bay need sun protection?: Whenever the UV index is 3 or above. In Half Moon Bay that is typically from September through April, and any other day UV reaches 3. SunSmart NZ and NIWA use the same UV Index scale as Australia.
Does Half Moon Bay need sun protection in winter?: Not every day. Midwinter middays in Half Moon Bay often sit below UV 3, but clear late-winter days (from August in much of Auckland) cross the threshold before the weather feels like spring. Check the live index.
Does the water make UV worse in Half Moon Bay?: It can. Sand and water reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.