Weather in Tonga

About Tonga

The Kingdom of Tonga remains proudly independent, its royal traditions intact and Polynesian culture flourishing. Each August, humpback whales migrate through the channels, with swimmers and boats encountering these gentle giants in unprecedented ways.

Country

Tonga

Best months to visit

May, June, July, August, October, November

Currency

TOP

Language

Tongan, English

Things to do in Tonga

Swim with migrating humpback whales Visit royal palace grounds Snorkel coral-fringed islands Hike volcanic peaks Fish for wahoo and tuna Attend traditional feasts

Weather by month

Click any month for detailed weather information and travel tips.

January

27C

Warm and pleasant, with regular rainfall.

February

28C

Warm and pleasant, with frequent heavy rain.

March

27C

Warm and pleasant, with regular rainfall.

April

27C

Warm and pleasant, with some rainy days.

Recommended

May

26C

Warm and pleasant, with some rainy days.

Recommended

June

25C

Warm and pleasant, with occasional showers.

Recommended

July

24C

Mild and comfortable, with occasional showers.

Recommended

August

24C

Mild and comfortable, with occasional showers.

September

24C

Mild and comfortable, with occasional showers.

Recommended

October

25C

Warm and pleasant, with some rainy days.

Recommended

November

26C

Warm and pleasant, with some rainy days.

December

26C

Warm and pleasant, with regular rainfall.

Tonga is one of the few places on Earth where you can swim alongside humpback whales as they migrate through its warm waters between July and October, an experience that draws visitors from across the world to Vava'u's sheltered anchorages. Beyond the whales, the kingdom's scattered island groups offer limestone caves, royal tombs in the capital Nuku'alofa, and a strongly traditional Polynesian culture that remains the region's only enduring monarchy.

Best areas to stay in Tonga

Nuku'alofa

The capital on Tongatapu, with the royal palace, tombs and markets, plus the nearby blowholes and Ha'amonga 'a Maui trilithon.

Vava'u

A group of sheltered islands and anchorages in the north, the main base for whale-swimming tours and yacht charters.

Ha'apai

A quiet, less-visited group of low coral islands between Tongatapu and Vava'u, known for empty beaches and snorkelling.

'Eua

A forested island near Tongatapu with caves, cliffs and hiking trails, including spots to see humpback whales from shore in season.

Getting to Tonga

✈

Flights

Fly into Fua'amotu International Airport on Tongatapu, typically via Auckland or Fiji.

⏱

From London

~28-34 hours from London including connections.

🚕

Getting around

Domestic flights and ferries connect the main island groups; on Tongatapu, buses and taxis cover the main sights.

Frequently asked questions

When can I swim with humpback whales in Tonga?

The whale season runs roughly July to October, with Vava'u the most popular base for licensed swim-with-whale tours.

What is the best time to visit Tonga overall?

May to October (the dry season) is cooler and coincides with the whale season, while November to April is hotter and wetter.

How do I get between Tonga's island groups?

Domestic flights connect Tongatapu (the main island) with Vava'u and Ha'apai; ferries are slower but cheaper alternatives.

Is Tonga expensive?

Generally moderate by Pacific standards, though whale-swimming tours and inter-island flights add up if visiting multiple groups.

What language is spoken?

Tongan and English are both official languages, with English spoken in tourist-facing businesses.

Traveler reviews

★★★★★

Swimming with a mother humpback whale and her calf in Vava'u, watching them glide beneath us, is something I'll never forget.

Mele V. · August 2023

★★★★☆

Ha'apai was wonderfully empty — we had entire beaches to ourselves and the snorkelling off the main island was excellent.

Sam K. · September 2024

★★★★★

The royal tombs and Ha'amonga trilithon near Nuku'alofa gave a real sense of Tonga's unbroken royal history, which we hadn't appreciated before visiting.

Lucy A. · July 2023