Weather in Phuket in December 2025 – detailed climate and travel guide

December is one of the best months to travel to Phuket.

The dry season begins, rainfall decreases, the sea is calm and warm, and there is significantly more sunshine. In this article, we will take a detailed look at the weather in Phuket in December 2025, the differences between the first and second halves of the month, sea temperature, rainfall, UV index, and also share travel tips.

Weather in Phuket in the first half of December 2025 (December 1–15)

The first half of December marks the transition to a fully stable dry season. Rain may still occur, but it is short and usually falls in the evening.

Temperature

• Daytime: 30–32 °C
• Night: 23–25 °C
• Sea: ≈28 °C

It feels hot, but the climate during this period is considered comfortable for beach vacations and excursions.

Rainfall

• 1–3 rainy days possible
• Showers are short and without prolonged storms

Sea conditions

The sea becomes consistently calm:

• excellent conditions for swimming,
• improved water clarity,
• snorkeling and diving become increasingly comfortable.

Weather in Phuket in the second half of December 2025 (December 16–31)

Late December marks the peak of the high tourist season and the most comfortable weather of the year.

Temperature

• Daytime: 31–33 °C
• Night: 24–26 °C
• Water: 28 °C

Rainfall

Rain becomes very rare — often there may be no rainy days at all throughout the week.

Sea conditions

The sea is at its calmest:

• ideal for: snorkeling, diving, marine trips, excursions to the Similan Islands, Racha and Coral islands.

Phuket Weather 2025 — December Overview Table

What to take with you in December

• Light summer clothing
• Swimsuits and beach accessories
• SPF 30–50 sunscreen
• Hat/cap and sunglasses
• Light cover-up for evening walks
• Compact rain poncho in case of a short tropical shower

What to do in Phuket in December

In December, when Phuket’s weather is especially favorable, excursions from Phuket Horizon become particularly attractive. Below is a selection of popular tours ideal for this time of year, considering warm temperatures, calm sea, and the vibrant holiday atmosphere.

Recommended excursions in December

Khao Lak Nature & Jungle Tour A full-day trip from Phuket to Khao Lak, combining jungle trekking, bamboo rafting, the Monkey Cave Temple (with the reclining Buddha), and waterfalls. This tour offers a very different, more relaxed and natural side of Thailand compared to the island beaches.

“Secrets of Avatar” Sunrise Tour A morning trip that includes the glass viewpoint bridge at Samet Nangshe and islands associated with the “Avatar” scenery. The light at sunrise is soft and perfect for photography and enjoying natural landscapes.

Jet Ski Island Routes Coastal bays and small islands in December are perfect for jet ski adventures: clear water, moderate waves, stunning scenery, and adrenaline. Routes to 6 or 9 islands are available with Phuket Horizon.

ATV Jungle Adventure A great choice for those who want to diversify their vacation: ride through Phuket’s tropical jungle, visit waterfalls, enjoy panoramic views. Some routes include a visit to the Big Buddha.

Why excursions are especially good in December

• The sea is calm, making boat tours and jet skis safer and more enjoyable.
• Days are sunny and bright, with comfortable temperatures — ideal for outings and activities.
• High season means guides and operators are highly active, offering the best tour options for the demand.
• Phuket Horizon provides professional guides, insurance, and convenient booking conditions — important when travelers want to secure top tours in advance.