Vava'u is the northern island group of Tonga and the destination most visitors come for. About 50 islands clustered around a deep natural harbour that has been sheltering yachts for decades — it's one of the finest anchorages in the South Pacific, which is why you'll always find a fleet of charter boats moored in the port of Neiafu.
Neiafu, the main town, sits on a ridge above the harbour with views over the water. It's a small place — a market, a handful of restaurants, dive shops, tour operators, and not much else. It has a pleasant, unhurried feel that suits the pace of island life. Most of what you want to do here requires a boat.
Whale watching and whale swimming are the main draw. Humpback whales are in Vava'u waters from mid-July to mid-October, and numerous licensed operators run tours from Neiafu. This is genuinely one of the best places in the world to do this. Slots fill early for August and September.
The outer islands offer deserted beaches, sea caves (the Swallows Cave and Mariner's Cave are the most visited), and excellent snorkelling on healthy reefs. Kayaking between islands is a popular way to spend a few days.
The Vava'u Group is the result of volcanic and limestone geology — the islands rise more steeply than flat Tongatapu, giving the landscape more drama and the water around the islands more depth and colour.