Secluded bay inside the national park with pale sand, rocks and coral at both headlands and one row of restaurants.
Nai Thon · 1 km · None · November–April · Revision Sep 5, 2026
Nai Thon Beach is 1 km of sand in Nai Thon, open to the south-west monsoon, without lifeguards, reached by road free of charge. Best months to swim: November–April; rip-current risk from May to October: high. Good for swimming, snorkelling, quiet, sunset.
Nai Thon is a kilometre of pale, fine sand in a bay between two rocky headlands inside Sirinat National Park, with a handful of hotels, one row of restaurants and the feeling of an island that has not been developed. The bay is sheltered enough for clean, easy swimming in the high season, and both headlands have rocks and coral in shallow water — the snorkelling at the northern end is among the best you can reach from the sand on the west coast. The wet season changes it: waves come straight in, the shore-break dumps and the rips run out along the rocks at both ends, with no lifeguard post; treat a flagged day as a walking day. Banana Beach, the tiny cove over the southern headland, is the day trip everyone staying here makes.
Source: Thai National Parks — Sirinat National Park (Sep 5, 2026) · All sources
| Month | Sea state | Rough days | Sea °C | Best months |
|---|---|---|---|---|
| Jan | calm | 0 | 28.8 | yes |
| Feb | calm | 0 | 29.1 | yes |
| Mar | calm | 0 | 29.8 | yes |
| Apr | calm | 0 | 30.7 | yes |
| May | some swell | 4 | 31.0 | — |
| Jun | some swell | 8 | 30.1 | — |
| Jul | rough | 13 | 29.9 | — |
| Aug | rough | 9 | 29.9 | — |
| Sep | rough | 12 | 29.2 | — |
| Oct | calm | 2 | 29.5 | — |
| Nov | calm | 0 | 29.8 | yes |
| Dec | calm | 0 | 29.0 | yes |
Source: Open-Meteo (ERA5), 2015–2026 (island rough-sea days, 2015–2025, damped for a beach that is open to the south-west monsoon); Open-Meteo Marine API (sea-surface temperature, 2022-12–2026-08).
Median monthly mean, west-coast grid point, 2022-12–2026-08 · Open-Meteo Marine API
Island rough-sea days, median per calendar month, 2015–2025; the beach's best months in the figure colour · Open-Meteo (ERA5), 2015–2026
The table above applies the island's marine normals to this beach: median rough-sea days per calendar month from Open-Meteo (ERA5), 2015–2026 (2015–2025, marine fields from 2022), damped by the beach's shelter, and median sea-surface temperature from Open-Meteo Marine API (2022-12–2026-08). Calm months here: October–April. Some swell: May–June. Rough: July–September. The sea is 28.8–31.0 °C as monthly medians, warm in every month; temperature never decides a swim on Phuket, the sea state does. The best-months row is the beach's own calm season and is derived, not opinion.
Nai Thon Beach is open to the south-west monsoon, which decides its year. It takes the south-west swell directly, so it follows the island's marine normals exactly: a calm sea in October–April and rough-sea days in May–September, when red flags fly on rough days and the rip-current risk is high. There are no lifeguards at any time, and no one is watching on a rough day. Caught in a rip: float, swim parallel to the beach until the pull stops, then in. Phuket records around 30–40 drownings a year, most of them between May and October on the open west coast; the hospitals catalogue names the nearest 24-hour emergency room from Nai Thon, and the emergency number is 1669. Jellyfish drift in after storms on the whole coast; vinegar is the first aid.
A few licensed loungers; restaurants on the single road behind the beach.
road · free
Steep road down from the coast road; parking along the beach road.
Hotels in Nai ThonAirport transfer to Nai ThonLiving in Nai Thon
Steep road down from the coast road; parking along the beach road. There is no entry fee. The beach is 0.1 km from the centre of Nai Thon as the site defines it. The airport-transfer page compares taxi, ride-hailing, minivan and the Smart Bus to Nai Thon; the index has no published taxi median for the area yet. 12 km separate the airport from Nai Thon by road. The nearest other beaches in this catalogue are Banana Beach (1.5 km), Layan Beach (3.9 km), Nai Yang Beach (4.5 km), Bang Tao Beach (7.1 km).
A few licensed loungers; restaurants on the single road behind the beach. Loungers, where present, are rented by the day from licensed operators in zones set after the 2014–2016 clean-ups. Natural shade exists behind the beach. Food and drink are available at or just behind the beach. Hotels, villa rents and the cost of a day in Nai Thon are priced on the area page from the index.
In November–April, yes — the sea is calm on the island's marine normals. From May to October the rip-current risk is high: the beach takes the swell directly and flies red flags on rough days. There are no lifeguards. Red flag means no swimming; in an emergency call 1669.
November–April. The sea is calm here in October–April and rough in July–September, on the island's marine normals (Open-Meteo (ERA5), 2015–2026) applied to a beach that is open to the south-west monsoon. Sea temperature runs 28.8–31.0 °C through the year, so it is never the deciding factor.
Steep road down from the coast road; parking along the beach road. Entry is free. Nai Thon is 12 km from the airport by road.
Loungers, Restaurants, Toilets, Parking, Natural shade; not showers. A few licensed loungers; restaurants on the single road behind the beach. Other beaches in Nai Thon: Banana Beach.
Concierge
A villa, a yacht, a helicopter and private tours arranged as one programme, with dated price references and one contact.