Weather and sea in March

  • Rain: one of the driest months, roughly 50 to 75 mm depending on the source, with the odd late-day shower or storm.
  • Temperatures: about 32 to 34 °C in the afternoon, 25 to 26 °C at night. It feels heavier than in January.
  • Sea: calm and clear on the west coast (Patong, Kata, Karon, Kamala), around 29 to 30 °C. A windy day can raise waves: the lifeguards' red flags decide.
  • Sun: the UV index is very high. Reef-friendly sunscreen, a hat and water for every outing.

To compare with other months, see the best time to visit Phuket; for the gentler heat of January and for the following month Phuket in April.

Crowds and prices

March is still late high season: the beaches of Patong and Kata are busy, but the pressure eases towards the end of the month. Book a seafront hotel a few weeks ahead; to pick an area see where to stay in Phuket, and for costs the budget guide.

Boat trips in March

March is a very good time for the sea: decent visibility, few waves. The Similan park stays open until about mid-May (dates set each year by the park), see Similan from Phuket. For the most-booked outing, the Maya, Phi Phi and Bamboo trip with buffet (about 42 USD per person, rated 4.6 from more than 21,000 reviews on GetYourGuide in October 2026) is the default choice; details are in Phi Phi from Phuket. For limestone scenery, see Phang Nga Bay and James Bond Island.

Leave early: in March boats are full from 10:00 and the midday heat is harsh.

What to do in the hot hours

FAQ

What is the weather like in Phuket in March?

Dry, hot and sunny: 32 to 34 °C in the afternoon, very little rain, a calm and warm sea.

Is March a good month for Phuket?

Yes, if you can stand the heat: calm sea, tours possible everywhere, fewer people than in winter.

Are the Similan Islands open in March?

Yes, the park is open from about mid-October to mid-May. Book ahead, as daily visitor numbers are limited.

Do I need to book in March?

For a seafront hotel and popular tours, yes, especially at weekends.