Reef-Safe Sunscreen in Hawaii
Hawaii was the first U.S. state to ban sunscreens containing certain chemical filters. Here's what the rule actually covers, what "reef-safe" really means on a label, and how to protect your skin and the reef without overthinking it.
Pack a mineral sunscreen and you're covered
If you only remember one thing: choose a sunscreen whose active ingredients are zinc oxide and/or titanium dioxide. That satisfies Hawaii's statewide law, Maui County's stricter rule, and the spirit of both.
Hawaii's reefs are a big part of why its beaches are special. They break waves, feed the fish you see while snorkeling, and in many places create the calm, clear water that makes a beach swimmable at all. Researchers have raised concerns that some common chemical UV filters can harm coral, and Hawaii responded by becoming the first state to restrict them. You don't need to become an expert in chemistry to do your part — but it helps to know what the rules say and what the labels mean.
What Hawaii's sunscreen law covers
In 2018 Hawaii passed a law (Act 104) that bans the sale and distribution in the state of sunscreens containing oxybenzone or octinoxate, unless they are prescribed by a licensed healthcare provider. The ban took effect on January 1, 2021. It applies to what stores and businesses sell and hand out; it is not a search of visitors' luggage.
Maui County went further. Its local ordinance, which took effect in 2022, limits sunscreen sold and used there to mineral-based products. If Maui is on your itinerary, a mineral sunscreen keeps things simple.
Because rules can be updated, it's worth a quick look at the label of anything you buy. In practice, most shops near popular beaches now stock mineral options prominently, and many resorts and tour operators ask guests to use them.
"Reef-safe" is a marketing term — check the active ingredients
In the United States, words like "reef-safe" and "reef-friendly" are not regulated. A bottle can carry them without meeting any particular standard. The reliable way to choose is to flip the bottle over and read the Drug Facts panel:
- Look for zinc oxide and/or titanium dioxide as the only active ingredients. These are mineral filters.
- Avoid oxybenzone and octinoxate, which are prohibited from sale in Hawaii.
- Choose broad-spectrum protection, SPF 30 or higher, and a water-resistant formula for swimming and snorkeling.
- Lotions over sprays at the beach: sprays drift onto sand and into the water, and they make it easy to miss spots.
Mineral sunscreens can leave a white cast, especially the thicker formulas. Tinted versions and rubbing in a smaller amount at a time both help. Give it a few minutes to set before you get in the water.
How to use it well on a Hawaii beach day
Hawaii sits in the tropics, and the midday sun is strong year-round — even when trade-wind clouds make it feel mild. Sunburn on the first day is one of the most common ways a Hawaii trip goes sideways.
- Apply early. Put sunscreen on before you leave for the beach, so it has time to set before you swim.
- Reapply on schedule. At least every two hours, and right after swimming or toweling off. Water-resistant labels say 40 or 80 minutes — treat that as your timer in the water.
- Cover up instead. A long-sleeve rash guard, swim leggings and a hat protect far more skin than any lotion and mean less sunscreen in the water. For snorkelers, a rash guard also protects the back of your neck and shoulders, which face the sun the whole time.
- Plan around midday. Mornings tend to bring calmer water and easier parking anyway; a shady lunch break in the strongest sun is an easy win.
- Don't forget lips, ears and feet. These burn quickly and are easy to miss.
Sunscreen is one part of reef etiquette
The way you behave in the water matters as much as what's on your skin. Don't stand on, touch or kick coral — it's a living animal and breaks easily. Give sea turtles and monk seals plenty of room; both are protected, and disturbing them is against the law. If you're new to snorkeling, practice in calm, shallow water over sand rather than over reef, and consider a flotation vest so you're not tempted to stand up mid-swim.
Planning where to go? Our island guides cover the best beaches on Oahu, Maui, the Big Island and Kauai, including which spots have lifeguards and the calmest water by season.
Reef-safe sunscreen, answered
Is it illegal to bring regular sunscreen to Hawaii?
Hawaii's statewide law bans the sale and distribution of sunscreens containing oxybenzone or octinoxate without a prescription; it is aimed at what stores sell, not at what is in a visitor's suitcase. Maui County has a stricter local rule limiting sunscreen to mineral-based products. The simplest approach is to bring or buy a mineral sunscreen so you never have to think about it.
What does reef-safe sunscreen mean?
In the United States, 'reef-safe' and 'reef-friendly' are marketing terms, not regulated labels. Check the active ingredients instead. Sunscreens whose only active ingredients are zinc oxide and/or titanium dioxide are the usual choice for Hawaii beaches and comply with both the state law and Maui County's mineral-only rule.
Which sunscreen ingredients are banned in Hawaii?
Statewide, the sale and distribution of sunscreens containing oxybenzone or octinoxate has been prohibited since January 1, 2021, unless prescribed by a licensed healthcare provider. Maui County separately restricts sales to mineral-based sunscreens.
How often should I reapply sunscreen at the beach?
Reapply at least every two hours, and right after swimming, toweling off or heavy sweating. Water-resistant sunscreens are labeled as lasting 40 or 80 minutes in the water, so time your reapplication around that label.