Does Mark Island need sun protection in winter?

Not every day. Midwinter middays in Mark Island often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.

Does the water make UV worse in Mark Island?

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 Mark Island today

At 32.5°S, Mark Island is surrounded by reflective water. Typical summer peaks of 10–12 (very high to extreme) plus sea glare make this a full-cover, full-sunscreen place. This is warm-temperate America: a long protection season from spring through fall, with clear winter days that can still burn.

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

Today and tomorrow in Mark Island

Peak UV, temperature and conditions for Mark Island. 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 island day in Mark Island can still sit at protection levels. Why you burn on cloudy days.

When Mark Island needs sun protection

Sun protection is needed in Mark Island typically from April through October, and any other day UV reaches 3. With water on more than one side, reflection is the default, not a beach-only problem.

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 Mark Island need sun protection?: Whenever the UV index is 3 or above. In Mark Island that is typically from April through October, and any other day UV reaches 3. The EPA Sun Safety action steps apply at the same threshold used worldwide.
Does Mark Island need sun protection in winter?: Not every day. Midwinter middays in Mark Island often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.
Does the water make UV worse in Mark Island?: 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.