UV Hour

UV index in Perth right now

0.0 UV Index
Low UV

The UV index in Perth is about UV 0 right now — the low band. Type II skin has an estimated over 24 h before first redness, unprotected. No level is risk-free — this is when to come in, not how long you may stay.

Today in Perth

UV 0 right now (low) · peak UV 3.8 at 12:00 · type II has about 44 min of unprotected sun before the first redness at the peak · protection recommended (WHO) 10:36–13:19

3.8 peak today
Moderate UV
  • 12:00 Peak UV hour
  • 44 min Est. first redness at peak, type II
  • 10:36–13:19 Protection recommended (UV 3+, WHO)
  • UV 0 Right now (low)
0 1 2 3 4 06:00 09:00 12:00 15:00 18:00 3.8 protection recommended (WHO) — UV 3
Protection recommended (UV 3+, WHO) UV index
Estimated minutes of unprotected sun before the first redness in Perth, by skin type. An estimate, not a safety limit — skin damage builds up before any redness shows.
Skin typeAt peak UV 3.8
I35 min
II44 min
III53 min
IV70 min
V88 min
VI1 h 45

The sun in Perth

Perth sits at 32°S under some of the clearest skies of any city its size — long dry summers, little haze, and an ocean-facing life on white-sand beaches that reflect light back onto skin. Fewer cloudy rescues, more clear-sky hours: the average day here simply carries more UV than the latitude alone suggests.

From November to February the midday index sits at the top of the scale day after day. The classic trap is the afternoon sea breeze — the “Fremantle Doctor” — which arrives with the hottest hours and cools skin exactly when the dose is at its peak. Comfort improves, the index does not; the beach afternoon feels safer precisely when it is not.

Time to first redness at today’s peak (UV 3.8), by skin type

Estimated minutes of unprotected sun before the first redness, at UV 3.8. An estimate, not a safe allowance — skin damage builds up before any redness shows. Below 20 minutes is in red.
Skin type Before first redness
I — Always burns, never tans. 35 min
II — Burns easily, tans minimally. 44 min
III — Burns moderately, tans gradually. 53 min
IV — Burns rarely, tans easily. 70 min
V — Burns very rarely, tans very easily. 88 min
VI — Almost never burns, always tans. 1 h 45

Every figure is 0.667 × MED ÷ UV, the standard erythemal formula, with the Fitzpatrick minimal erythemal doses. See the full method and its sources.

Perth — the questions people actually ask

What is the UV index in Perth right now?

As of the last 15-minute refresh, the UV index in Perth is about 0 — the low band. At that level, fair skin (type II) reaches the first visible redness in about over 24 h unprotected. The chart on this page shows the rest of the day, hour by hour.

When do you need sun protection in Perth today?

The WHO recommends sun protection from UV 3 upward, for every skin type. On the current forecast, Perth is at or above UV 3 from 10:36–13:19 local time today. Outside that span the index is lower — the dose still accumulates, just more slowly.

Can you tan in Perth today?

The forecast peak is about UV 3.8 at 12:00, above the roughly UV 2 threshold where melanin production starts — so the skin will respond. That response is damage: there is no risk-free tan at any level. What this page gives you is the other number — about 44 min before first redness for type II at the peak — as a point to stay well under, not a target.

Why does the sun in Perth feel weaker than it is?

From November to February the midday index sits at the top of the scale day after day. The classic trap is the afternoon sea breeze — the “Fremantle Doctor” — which arrives with the hottest hours and cools skin exactly when the dose is at its peak. Comfort improves, the index does not; the beach afternoon feels safer precisely when it is not. Heat and UV are different quantities: the index depends on sun angle, ozone, altitude and cloud — not on temperature, and not on wind.

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