South Africa’s sun is stronger than most people realise, even right now

Every time SAWS mentions a “high” or “very high” UVB sunburn index in a forecast, most people scroll straight past it.

But South Africa’s relationship with the sun is genuinely unusual, and it’s worth understanding why.

Why South Africa’s UV levels are naturally this high

South Africa consistently records some of the highest UV index readings in the world.

That comes down to its geographic position, altitude, particularly on the Highveld, and clear skies for much of the year. 

SAWS has been measuring UVB radiation since 1994, using monitoring stations in Pretoria, Cape Town, Durban, Port Elizabeth and De Aar.

Its own data shows radiation levels sit in the high to extreme range from August through April at nearly every one of those sites.

What the actual numbers mean

The index runs on a scale from 0 to 10+.

It isn’t just a rough guide, it’s a linear scale, meaning a reading of 12 represents genuinely double the intensity of a reading of 6.

A score of 3 to 4 counts as low risk, where a hat and SPF 15 sunscreen are enough.

Moderate risk sits at 5 to 6, adding shade to the mix.

Once you hit 7 to 9, classified as high, health guidance recommends staying indoors between 10am and 4pm entirely, on top of the earlier precautions.

Why this still matters in winter

It’s easy to assume UV risk is a summer-only concern, but South Africa’s high-to-extreme readings from August through April mean the risk window is far longer than most people expect.

A “base tan” also offers only minimal protection, roughly equivalent to SPF 2 to 4, and actually signals that skin damage has already occurred rather than offering real protection going forward.

It is quite hectic to think our sun can already be sitting in the “high” category while it still feels like winter, hey.

I’ll be honest, I actually love a higher UVB index since I enjoy tanning, so this kind of news gets me a little excited.

That said, I never skip the SPF, no matter how tempting it is to catch some extra sun.

Do you check the UV index before heading out, or does sunscreen only come out once summer properly arrives?