The thing people get wrong is packing for one climate. In a single day on Maui or Hawaiʻi Island you can be on a hot beach and then at 10,000 feet in near-freezing wind. Pack thin layers instead of bulk and you cover every scenario in a carry-on.
What you really need
- Mineral sunscreen, zinc oxide, SPF 30 or higher. Hawaii bans oxybenzone and octinoxate by law, and plenty of bottles labeled reef safe still contain one of them, so read the active ingredients rather than the front of the bottle. If it says zinc oxide or titanium dioxide, it qualifies. Bring more than feels reasonable, and note that Maui County bans everything except mineral, so buying on arrival there is mineral or nothing.
- Rash guard or long-sleeve swim top. Better than reapplying sunscreen every hour while snorkeling.
- Water shoes or sturdy sandals. Lava rock, reef shelf and river-mouth trails all punish bare feet.
- A light fleece or midlayer. For Haleakalā, the Mauna Kea visitor station, Volcanoes National Park and any upcountry evening.
- Packable rain shell. Windward showers are frequent, brief and heavy.
- Refillable water bottle. Tap water is excellent and hikes here dehydrate you fast.
- Dry bag. For boat days, kayaks and waterfall hikes.
- Insect repellent. Mosquitoes are a factor in rainforest and around waterfalls.
Blue Lizard mineral sunscreen, zinc oxide
Clothing, realistically
For a week: swimwear you can rotate, three or four t-shirts, one long sleeve, shorts, one pair of light pants, a dress or collared shirt for a nicer dinner, a hat and sunglasses. Hawaii is informal almost everywhere. A collared aloha shirt counts as formal wear.
Footwear: sneakers or trail shoes, sandals, water shoes. That is the whole list.
Water shoes for lava rock entries
Worth bringing if it applies
- Your own snorkel and mask if you snorkel often. Rentals fit badly and the cost adds up over a week.
- Binoculars for whale season. They transform shore watching between December and March.
- Reef-safe lip balm with SPF. The most commonly burned spot on a boat day.
- Motion sickness tablets if you have booked Molokini or a Nā Pali boat. Take them before boarding, not after.
- A headlamp for a lava-glow evening or a pre-dawn summit drive.
A dry bag for the boat and waterfall days
Leave it at home
- Heavy hiking boots. Too hot and heavy for almost every trail here.
- Beach towels, chairs, umbrellas and boogie boards. Rentals and cheap Costco buys beat paying to fly them over.
- Formal clothes. Almost nowhere in Hawaii requires them.
- Hairdryer or iron. Your accommodation has what you need.
Buy on the island
The Costco near the airport on Oʻahu, Maui and Kauaʻi is the standard first stop. Sunscreen, water, snacks, cheap beach kit and fuel, all at a fraction of resort prices. Plenty of visitors buy a $20 cooler and beach chairs on day one, then donate them at the end.
The altitude days need real clothes
This is the packing failure that shows up in the most vacation photographs: people shivering through a Haleakalā sunrise in shorts and a hotel towel.
Haleakalā summit at dawn sits at just under 10,000 feet and runs to around 30 to 40°F, with wind on top of that. You have come from a beach at 80°F, four hours and 10,000 vertical feet earlier. Bring a proper fleece or puffy, a hat, gloves and long pants. Not a beach cover-up.
Mauna Kea visitor station at 9,200 feet is comparable, and colder after dark when the stargazing is worth doing. The summit itself is higher again, and rental agreements generally forbid driving there.
Hawaiʻi Volcanoes National Park sits around 4,000 feet and runs roughly 15°F cooler than the coast, with frequent rain. A fleece and a rain shell cover it.
None of this needs bulk. One thin insulated layer, one shell, one warm hat, packed once, covers every high-altitude morning of the trip.
A packable jacket that survives a summit
Traveling with children
Four things do disproportionate work on a family trip, and general packing lists miss all of them.
- Rash guards for everyone. A long-sleeved swim top is the difference between one sunscreen application a day and a negotiation every ninety minutes.
- Your own car seats. Free on most airlines, and always cheaper and cleaner than the rental counter version, which is charged per day and arrives in unpredictable condition.
- Water shoes in the right size. Much of the coastline is lava rock and reef rather than sand, and small feet stop the day faster than adult ones.
- A cheap cooler bought on day one. Beach days run hours longer when there are cold drinks in the trunk, and it costs $20 to find out.
Mineral sunscreen sticks for small faces
Flying home
Agricultural inspection applies to bags leaving Hawaii for the mainland, and it is a real screening rather than a formality. Most fresh fruit, plants with soil, and anything uninspected will be taken off you at the airport.
What travels fine: commercially packed and inspected pineapple, coffee, macadamia nuts, honey, chocolate and anything sealed and labeled from a store. What does not: fruit picked from a tree, cuttings, plants in soil, and most fresh produce from a farmers market unless it has been certified.
Leave room for the things worth taking home. Kona coffee, island honey and macadamias are genuinely better here than the mainland versions, and they weigh little. Leave behind the cooler, the beach chairs and the boogie board: donating them or passing them to the next guest is standard practice and beats paying to fly them back.
