Climate Overview
Phuket has a tropical-monsoon climate with 31–34°C highs year-round and a soaking southwest monsoon May–Oct that can dump 437mm in Sep. Nov–Apr is the dry, calm-sea window — the prime beach and island-hopping stretch; monsoon months bring rough seas and ferry cancellations to Phi Phi.
Monthly Climate
Temperature range, rainfall, and humidity by month
Monthly Data
| Month | High | Low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 33.2° | 24.9° | 25mm | 72% |
| Feb | 34.1° | 24.8° | 54mm | 71% |
| Mar | 34.5° | 25.7° | 76mm | 74% |
| Apr | 33.6° | 25.3° | 201mm | 82% |
| May | 32.7° | 25.2° | 455mm | 85% |
| Jun | 32.8° | 25.4° | 438mm | 83% |
| Jul | 33.1° | 27.1° | 137mm | 79% |
| Aug | 32.3° | 25.4° | 386mm | 79% |
| Sep | 31.3° | 26° | 317mm | 84% |
| Oct | 31.3° | 25.1° | 406mm | 85% |
| Nov | 30.8° | 25.2° | 223mm | 84% |
| Dec | 32.4° | 24.6° | 18mm | 77% |
When to Visit
Experiences to seek out and peak periods to plan around
Experiences & Highlights
Feb–Mar rainfall drops to 49–55mm and humidity falls to 73–74%, the calmest window for Phi Phi, Similan and Phang Nga Bay longtail trips from Chalong and Rawai.
Nine-day Taoist Nine Emperor Gods festival (2026: 10–18 Oct) at Jui Tui, Bang Neow and Kathu shrines — firewalking, body-piercing processions through the old town and jay street food despite peak 87% humidity.
Full-moon night of the 12th lunar month — krathongs floated at Patong, Karon and Nai Harn beaches as rainfall eases from 399mm (Oct) to 225mm and the northeast wind returns.
13–15 Apr — Bangla Road in Patong and Thalang Road in the old town turn into citywide water fights during Phuket's hottest stretch (34.3°C highs, lows of 25.3°C).
Peak Periods & Travel Advisories
Wettest stretch of the year: Aug 412mm, Sep 437mm, Oct 399mm with humidity at 86–87%. Strong surf and red-flag swimming bans on Patong, Karon and Kata; longtail boats to outer islands frequently cancel.
Peak of the dry season (Dec 88mm, Jan 93mm) brings European and Russian winter traffic — Patong, Kata and Surin hotel rates spike 60–120% and flights into HKT from Bangkok, Dubai and Moscow sell out 2+ months ahead.
Thailand's national holiday concentrates domestic travel on the island: HKT arrivals from Bangkok peak, Patong accommodation books out and many family-run restaurants close 1–2 days for the water-fight mayhem.
Thailand Destination Comparison
Compare climate across destinations in Thailand
| City | Avg High | Avg Low | Annual Rain | Season Overview |
|---|---|---|---|---|
🇹🇭 Phuket | 33° | 25° | 2735 mm | |
🇹🇭 Bangkok | 33° | 25° | 1716 mm | |
🇹🇭 Chiang Mai | 33° | 22° | 2100 mm |
Official Resources
Government portals and tourism boards for Phuket, Thailand