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HILTON HEAD ISLAND, SC · LOWCOUNTRY / BEAUFORT COUNTY EDITION · FRIDAY, MAY 29, 2026
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Sunscreen Basics: What SPF Means and How to Apply for Maximum Protection

Published May 28, 2026 at 11:24 pm | By Lamar G. Helmly, Staff Reporter

Sunscreen Basics: What SPF Means and How to Apply for Maximum Protection

With Hilton Head Island’s sunny climate, sunscreen is an essential part of any outdoor activity. Dermatology authorities recommend using a broad-spectrum, water-resistant sunscreen with an SPF of 30 or higher for everyday outdoor use. SPF 30 blocks approximately 97% of UVB rays when applied correctly, making it a reliable choice for those spending time in the sun.

Broad-spectrum sunscreen is vital as it protects against both UVA and UVB rays. UVA rays are associated with premature aging and some skin cancers, while UVB rays are the primary cause of sunburn. Only sunscreens labeled as broad-spectrum provide protection against both types of harmful rays, ensuring comprehensive skin safety during outdoor activities on Hilton Head Island.

One common mistake many people make is not applying enough sunscreen. To achieve the full protective benefits, about one ounce—roughly enough to fill a shot glass—is needed to cover an adult’s entire body. Unfortunately, most individuals apply significantly less, which can greatly reduce the effectiveness of even high-SPF products.

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Reapplication is another critical aspect of sunscreen use. Dermatology experts recommend reapplying sunscreen every two hours, regardless of the SPF number. This is especially important after swimming or sweating, as no sunscreen is completely waterproof. Water-resistant formulas are effective for either 40 or 80 minutes in water, as indicated on the label, but should still be reapplied afterward.

Sunscreen should be part of a layered approach to sun protection. This includes seeking shade during peak UV hours, which typically fall between 10 a.m. and 2 p.m. Additionally, wearing UV-protective clothing, wide-brimmed hats, and UV-blocking sunglasses can enhance protection against harmful rays. By combining these strategies with proper sunscreen application, residents and visitors of Hilton Head Island can enjoy the outdoors while minimizing the risk of skin damage.

As the summer season approaches and outdoor activities increase, it’s essential for everyone to prioritize sun safety. Understanding the basics of sunscreen and its proper application can significantly reduce the risk of sunburn and long-term skin damage, allowing for a safer and more enjoyable experience on the beautiful beaches of Hilton Head Island.

What's Happening
What happened?
Dermatology authorities recommend a broad-spectrum, water-resistant sunscreen with SPF 30 or higher for everyday outdoor use; SPF 30 blocks approximately 97% of UVB rays when applied correctly.
Why does it matter to Hilton Head Island?
Broad-spectrum means the product protects against both UVA rays (associated with premature aging and some skin cancers) and UVB rays (the primary cause of sunburn); only sunscreens labeled broad-spectrum provide both types of protection.
What's next?
Application quantity matters: about one ounce—enough to fill a shot glass—is needed to cover an adult's entire body; most people apply significantly less, which reduces effective protection even with a high-SPF product.
Lamar G. Helmly
HERE Hilton Head · HEALTH

Lamar is a staff reporter for HERE Hilton Head covering local news, community stories, and developments across Beaufort County. Lamar is committed to accurate, community-first journalism.

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