Cook Islands

Entry is simple: most nationalities — US, UK, EU, Canadian, Australian — get up to 31 days visa-free on arrival (New Zealanders get 90), extendable monthly if you fall in love with the place. A passport valid six months is required.

The one thing that catches people out is that the Cook Islands enforce the need for an onward ticket and pre-booked accommodation — have your first nights confirmed before you fly. As a self-governing nation in free association with New Zealand, it uses the NZ dollar and its people are NZ citizens.

Sort your first accommodation before arrival — the booked-bed rule is genuinely checked at immigration, unlike in many places. Everything runs on New Zealand dollars, so there’s nothing to change if you’re routing through Auckland, the main gateway.

Rarotonga is where you land and where most of a trip happens — a classic volcanic high island, its jagged green interior ringed by a lagoon and a single flat coast road you can drive (or bus) around in under an hour. The capital, Avarua, sits on the north coast; the beach-and-lagoon hub is Muri on the southeast.

For a bit of adventure, the cross-island trek climbs past the needle of Te Rua Manga to Wigmore’s Waterfall, and the Saturday-morning Punanga Nui market is the island’s social and culinary set-piece.

Base yourself at Muri Lagoon for the best swimming and sunrise, and use the clockwise/anticlockwise bus or a scooter to circle the island at leisure. Time your week to catch the Saturday Punanga Nui market in Avarua, and tackle the cross-island trek with a guide — it’s short but genuinely muddy and steep.

If Rarotonga is the base, Aitutaki is the swoon — a huge, impossibly blue lagoon studded with white-sand motu, a short hop north by air. The classic experience is a lagoon cruise, snorkelling the coral gardens and landing on sandbars, with the famous One Foot Island and its novelty passport stamp as the centrepiece.

You can do it as a day-trip from Rarotonga, but staying a night or two lets the lagoon work its slow magic beyond the cruise crowds. Aitutaki is quieter and more low-key than Rarotonga — a handful of resorts and a village or two rather than a developed strip — so an overnight is as much about the stillness as the water.

If the lagoon is the reason you came, give Aitutaki an overnight rather than squeezing it into a day — the light on the water at dawn and dusk, with the cruise boats gone, is the real prize. Book the flight and lagoon cruise ahead in peak season, as both the small planes and the better cruises fill up.

Cook Islands culture is vivid and present. The ’ura dance — fast-hipped and driven by thunderous pātē drumming — is among the most powerful in Polynesia, showcased at the resort "Island Nights" that pair a dance show with an umukai feast.

The other side of the coin is Sunday: the Cook Islands are devoutly Christian, and a CICC church service of soaring a cappella hymns (imene) is a genuine highlight open to respectful visitors. The handmade tīvaevae quilt is the signature craft.

Go to an Island Night for the dance and feast, and — if you can — a Sunday church service for the singing, dressing modestly and sitting quietly at the back. Remember that Sundays are quiet: many shops, tours and some restaurants close, so plan a lagoon or rest day around it.

For such small islands, the Cook Islands offer plenty on and under the water. The lagoons at Muri (Rarotonga) and especially Aitutaki are superb for snorkelling, kayaking and glass-bottom boats, with wall dives outside the reef for those who go deeper.

In season, humpback whales cruise past Rarotonga (July–October), sometimes seen from the shore or on boat tours. For something wilder, the "makatea" island of Atiu — a raised coral island of caves, coffee and birdlife — and the far-flung northern atolls reward travellers with time and patience, reached on Air Rarotonga’s less frequent inter-island hops.

Rarotonga is almost comically easy to get around: a single ring road, circled by a bus that runs clockwise and anticlockwise (just flag it down), plus scooters and small rental cars. The island’s only international airport, RAR, sits just west of Avarua, with most flights connecting through Auckland.

To reach the other islands you fly — Air Rarotonga links Rarotonga to Aitutaki in about 45 minutes, and on to Atiu, Mauke and the remote north. The Cook Islands are spread over a vast ocean, so inter-island hops are by plane, not boat, for visitors.

The dry season (April–November) is the time to go — cooler, less humid and drier, with the peak comfort around June to August. The wet season (December–March) is hotter and stickier, with heavier rain and a degree of cyclone risk.

A happy overlap: the humpback whale migration (July–October) falls squarely within the best weather window, so a mid-year trip can catch both calm seas and whales off Rarotonga.

Money is easy and relatively kind: everything runs on the New Zealand dollar (with charming local coins, including a triangular $2 piece worth keeping), and prices are moderate for the South Pacific — a real step down from the luxury tariffs of Tahiti, with everything from backpacker digs to upscale lagoon resorts.

The defining feature is the pace: unhurried, warm, and deeply Christian, which means Sundays slow right down for church. Lean into it — this is a place to read, swim and go to a hymn service, not to tick off a packed itinerary.

• Lagoon perfectionSkipstaying only on RarotongaGoa day-trip or a night on Aitutaki
• An easy island baseSkipoverplanningGoRarotonga — circle it by bus, stay at Muri
• WhalesSkipthe wrong seasonGoJuly–October off Rarotonga’s coast

Carry NZ dollars and don’t over-schedule — the Cook Islands reward slowness. Plan around Sunday closures (stock up on Saturday, keep Sunday for the lagoon or church), and if the lagoon is your priority, give Aitutaki a night rather than rushing it as a day-trip.