The core three
Mask: fit beats price, always. Test before buying or accepting a rental: press it to your face without the strap and inhale gently through your nose — it should hold on suction. Silicone skirts seal better than PVC; that’s the one spec worth paying for. Snorkel: a simple J-tube or semi-dry (splash guard on top) is all Hawaii’s surface snorkeling needs. Fins: open-heel with straps adjust across a trip and pair with reef shoes; full-foot fins pack smaller. Either works — blisters don’t, so size honestly.
Rent, buy or bring?
The math is simple. Renting runs about $25/day at managed beaches (Hanauma) and from shops near the famous spots — right for a one-session trip. Buying locally — ABC Stores, Costco (famously good snorkel-set value if you’re a member), Walmart, or the snorkel shops in Kona, Lahaina and Hanalei — pays for itself by session two, and the gear flies home as a souvenir that works at the next beach destination too. Bringing your own wins if you already own a mask that fits; a known-good seal is worth its suitcase space. One warning either way: the wilder spots — Two Step, Honolua, Electric Beach, Tunnels — rent nothing on site. Gear up in town first.
The supporting cast
Rash guard: the single best purchase on this page — sun protection that can’t wash off onto the reef, covering exactly the surface a snorkeler burns. Reef-safe sunscreen for face, neck and legs: Hawaii’s Act 104 bans oxybenzone and octinoxate statewide, so buy mineral (zinc oxide/titanium dioxide) — available everywhere in the islands, often cheaper than the banned stuff at home. Reef shoes: non-negotiable at lava entries, useless at sand beaches; check your spot’s entry type in the Spot Finder. Flotation belt or vest: zero shame, pure upside for newer snorkelers. Defog: a tiny bottle of baby shampoo does the job for pennies.
Worth it / skip it
Worth it: a floating phone pouch or entry-level action camera (the manta boats and Molokini justify it), a dry bag for the rocky-entry spots, motion-sickness tablets taken before boat departures. Skip it: full-face masks (harder to clear, banned on several tours — a conventional mask learns better), gloves (reef-touching equipment for a no-touching state), and knives, spears or “tickle sticks” of any kind (this is a conservation destination; several of our spots are no-take reserves).
The printable list
Mask (seal-tested) · snorkel · fins · reef shoes (lava spots) · rash guard · mineral reef-safe sunscreen · flotation belt (if wanted) · defog · water bottle · towel + dry layer for boat rides · buddy. That last item is the only one on the list that’s mandatory at every spot in Hawaii.
Sources
- Sunscreen law: Hawaii Act 104 (statewide oxybenzone/octinoxate ban).
- Rental pricing: Hanauma Bay concession and shop rates verified in our spot research, August 2026.
FAQ
Is Hawaii’s sunscreen law actually enforced?
Retailers in Hawaii simply don’t sell the banned formulas, which does most of the enforcing. Practically: buy sunscreen after you land and the law handles itself.
Are cheap ABC Store snorkel sets good enough?
For calm-water Hawaii snorkeling, genuinely yes — if the mask seals on your face. The seal test in the aisle matters more than the price tag.
Do I need a wetsuit in Hawaii?
For daytime snorkeling, no — the water runs 74–80°F. The one exception: night trips like the Kona manta snorkel, where you’ll be still at the surface after dark — and those operators provide wetsuits.