Is Reef-Safe Sunscreen Required in the Cayman Islands?

The short answer

Reef-safe sunscreen is not required by law in the Cayman Islands. As of 2026 there is no ban on any sunscreen and no rule forcing you to use a reef-safe one. Using one is voluntary, but it is strongly encouraged, and it is the right call for the reefs you came to see.

What that means in practice:

• Use a mineral sunscreen whose active ingredient is non-nano zinc oxide or titanium dioxide. These are the ones labelled "reef-safe" or "reef-friendly."
• Avoid sunscreens containing oxybenzone, octinoxate, or octocrylene, the chemicals linked to coral damage.
• Better still, cover up. A UPF rash guard and a hat cut how much sunscreen you need in the first place.

You can bring your own or buy it here; either way it is a small change that makes a real difference.

Is there a law or a ban? (2026)

No. Unlike a growing list of destinations, the Cayman Islands has not passed any reef-safe sunscreen legislation. There is no ban on selling, importing, or using sunscreens with reef-harming chemicals, and no requirement to wear a mineral one.

There is, however, an active campaign for one. Protect Our Future (POF), a local youth environmental advocacy group, is petitioning the Cayman Islands Government to act, arguing that with the current government's stated commitment to stronger environmental protection there is now an opening for real change. POF is calling for a ban modelled on Hawaii's, which would:

• Ban the sale of sunscreen containing oxybenzone, octinoxate, and octocrylene;
• Mandate mineral-based sunscreens using zinc oxide or titanium dioxide;
• Introduce fines of CI$1,000 for a first offence and CI$2,000 for repeat offenders, applying to residents and tourists alike;
• Roll out an education campaign for visitors and residents.

For now this is a proposal, not the law. Destinations that have already passed bans include Hawaii, Mexico, Aruba, Bonaire, and Key West, which is part of why the campaign argues Cayman is behind.

Why it matters

The reason the issue gets so much attention here is how little it takes to do damage. Chemicals like oxybenzone can bleach and damage coral in extremely small amounts. Campaigners cite research that just 63 micrograms per litre of oxybenzone is enough to begin harming coral, roughly the same as one drop in an Olympic-sized swimming pool.

A single layer applied before a swim can affect the very reef you are floating over, and the chemicals do not simply disappear. In heavily used spots like Seven Mile Beach and Rum Point, the build-up adds up over time. Given how central the reefs are to Cayman's environment, economy, and way of life, the case for switching is straightforward even without a law.

What to use, and what to avoid

Avoid these ingredients (check the active-ingredients panel on the back): oxybenzone, octinoxate (octyl methoxycinnamate), and octocrylene.

Choose a mineral sunscreen instead. Look for non-nano zinc oxide or titanium dioxide as the active ingredient, ideally broad-spectrum and fragrance-free. These are the products marketed as reef-safe or reef-friendly. "Non-nano" simply means the mineral particles are large enough not to be ingested by coral.

Reduce how much you need. The most reef-friendly option of all is to cover up: a UPF-rated rash guard, a hat, and shade cut your sunscreen use dramatically, which also saves money given on-island prices.

Do tours or resorts require it?

There is no enforced rule, but in practice many dive and snorkel operators and some resorts request or encourage reef-safe sunscreen, and it is considered basic etiquette at the marine parks and at sites like Stingray City. Treat it as a courtesy that good operators expect rather than something you will be checked for. If you are booking a snorkel or dive trip, applying a mineral sunscreen well before you get on the boat (so it has time to absorb) is the considerate move.

Where to buy reef-safe sunscreen in Grand Cayman

Mineral, reef-safe sunscreen is sold at pharmacies, dive shops, and the larger grocery stores across Grand Cayman. As with most goods here it costs more than at home, so many visitors pack their own. If you would rather buy on arrival, dive shops are the most reliable for genuine reef-safe options, and the bigger supermarkets carry mineral lines. Whatever you buy, the label check is the same: zinc oxide or titanium dioxide, not oxybenzone or octinoxate.