Oahu is the rare place where the headline attractions are genuinely cheap and the hidden costs are parking and planning. Four of the five things below cost under eleven dollars a head, and the most-visited site on the island is a fee-free national park. Where money actually leaks is car parking, the one expensive attraction, and the cost of not booking — two of these now turn non-residents away without a reservation. Every price below is the non-resident rate; Hawaii residents pay less or nothing almost everywhere. Prices are in US dollars as published.
1. Waikiki Beach and the Kuhio Beach hula show
The anchor that costs nothing: a public beach, no ticket, and a genuine hula show on the sand rather than a $150 luau. The show runs at the Kuhio Beach Hula Mound, on the ocean side of Kalakaua Avenue near the Duke Kahanamoku statue.
It is Saturdays only now, 6:30pm to 7:30pm, and free. The Tuesday shows were discontinued after June 2026 and no Thursday show is listed — most travel blogs still tell you it runs three nights a week. It is grass seating, so bring a mat and arrive before six.
2. Pearl Harbor and the USS Arizona Memorial
The best value per dollar on the island. Pearl Harbor National Memorial is a fee-free park and the USS Arizona Memorial programme itself is free — the only charge is a $1 non-refundable booking fee through Recreation.gov. Parking is $7 a day.
The visitor centre opens 7:00am to 5:00pm seven days a week, with the first Arizona programme at 8:00am and the last at 3:30pm. Closed Thanksgiving, Christmas Day and New Year's Day.
The important change: the walk-up programme has been discontinued. Standby seating exists but cannot be guaranteed. Tickets release daily at 3:00pm Hawaii time in two windows — eight weeks ahead and twenty-four hours ahead — so set an alarm. And leave your bag in the car: backpacks, purses and camera bags are not permitted, and storage costs extra.
3. Diamond Head State Monument
The cheapest iconic view in Hawaii at $5 a person, with parking a separate $10 per vehicle. Children three and under are free, and Hawaii residents enter free with ID. Card payment only.
Open 6:00am to 6:00pm daily, closed Christmas and New Year's Day, with the last reservation slot at 4:00pm and entry cut off at 4:30pm. Non-residents must reserve, up to thirty days ahead, and arrive within the first thirty minutes of the slot or risk being turned away.
The saving is simple: book entry only and arrive on foot or by bus. You skip the $10 parking entirely, and walk-in visitors can leave whenever they like rather than being tied to a parking slot. Two people walking in is $10 instead of $20.
4. Manoa Falls Trail
The free rainforest counterweight to the paid coast. There is no entrance fee for the trail itself; the only cost is parking at the Paradise Park lot, listed at around $7 a vehicle, open 8:00am to 6:00pm.
Free street parking exists in lower Manoa along Waakaua Street and the side roads off it, roughly a ten-minute walk away. Go early — it is a genuine rainforest trail and it turns to mud.
5. Hanauma Bay Nature Preserve
The one expensive item, and worth knowing exactly what you are paying for: $25 for anyone 13 and over, plus an online booking fee, with children 12 and under free and parking $3. Hawaii residents enter free with ID and need no reservation.
Closed Mondays and Tuesdays, plus Christmas and New Year's Day — this catches out more visitors than anything else on Oahu. Entry runs 6:45am to 1:30pm, the beach is cleared at 3:30pm and everyone is out by 4:00pm.
Reservations release two days ahead at 7:00am Hawaii time, with about a quarter of capacity held for walk-ins. Everyone must watch a mandatory orientation video on every visit, so book the earliest slot and bring your own snorkel gear rather than renting.
Worth knowing
- Hanauma Bay is shut Mondays and Tuesdays. If your trip is a Monday-to-Tuesday stop, you will not get in at all. Plan the rest of the island around that.
- Turning up at Pearl Harbor without a booking is now a real risk, not a minor one. The first-come, first-served programme is gone and standby is explicitly not guaranteed at peak times.
- Ala Moana Regional Park is the free local alternative to Waikiki, open 4:00am to 10:00pm daily. Note the Lester McCoy Pavilion courtyard is under renovation, with completion hoped for spring 2027.
- Storm closures at state parks are refundable. Hawaii's land department processes automatic refunds minus service charges when a park closes for weather, taking four to six weeks — relevant to Diamond Head bookings in storm season.
The short version
Waikiki, the Saturday hula show and Manoa Falls are free, Diamond Head is five dollars and Pearl Harbor is one. Book Diamond Head and Pearl Harbor well ahead, walk in rather than paying to park, and remember Hanauma Bay is closed Mondays and Tuesdays before you build a day around it.