New Zealanders love the outdoors – beaches, hikes, backyard BBQs, weekend sports. But with relatively high ultra violet radiation (UVR) levels in New Zealand, how we apply sunscreen matters just as much as choosing the right bottle.
Here are five essential sunscreen facts every Kiwi (and visitor) should know to stay protected:
1. Choose broad-spectrum, water-resistant SPF 30+ – every time
SPF 30+ is the minimum SPF needed for New Zealand’s intense sun. Look for broad-spectrum protection (protects against UVA and UVB) and water resistance for swimming. Reapply at least every two hours - or more often if you have been swimming or sweating. Choose sunscreens tested to the AS/NZS 2604 standard for reliable protection.
2. Apply the right amount – and apply it 20 minutes before heading out
Most people don’t use enough sunscreen for reliable protection. For full-body coverage, aim for about seven teaspoons (roughly 35 ml) on exposed skin:
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1 teaspoon for each arm
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1 teaspoon for each leg
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1 teaspoon for the front of the body (chest and stomach)
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1 teaspoon for the back (ask for help for hard-to-reach areas)
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1 teaspoon for your face, neck, and ears
Timing matters: sunscreen needs time to bind to your skin. Only 38% of people apply sunscreen 20 minutes before going outside – but that delay can leave your skin exposed. Make applying sunscreen 20 minutes before heading outside a habit.
3. Reapply every two hours – and more often if you’re swimming or sweating
Even the best sunscreen wears off. Reapply every two hours while outdoors, and immediately after swimming and heavy sweating (towel-dry first). “Water-resistant” doesn’t mean “waterproof.” Sunscreen helps reduce exposure to UV radiation, but that’s all. It should not be used to increase the amount of time you can spend in the sun.
4. Store sunscreen properly – and check the expiry
Heat and sunlight can break down active ingredients. Don’t leave sunscreen in hot cars or in direct sun like on a window sill. Store in a cool, shaded spot, check expiry dates, and replace if sunscreen is past its expiry date or the texture, colour or smell changes.
5. Sunscreen isn’t a once-and-done step
Applying enough, applying and reapplying often are the keys to reducing your risk of sunburn, early skin aging, and skin cancer. Small tweaks make a big difference – keep sunscreen handy and make these habits routine.
When the Ultraviolet Index (UVI) is 3 and above, for the best protection use all five SunSmart behaviours – Slip into clothing, Slip into shade, Slop on sunscreen, Slap on a hat, and Wrap on sunglasses.