Phuket has two seasons: a dry, sunny high season from November to April and a green monsoon season from May to October. Here is what each month really feels like, how the sea behaves, when to come — and what to pack.
Phuket sits in a tropical monsoon climate — hot and humid all year, with daytime temperatures almost always between 26°C and 34°C. What changes is the rain and the sea. The dry high season (November–April) brings sunshine, calm water and the safest swimming; the green monsoon season (May–October) brings warm downpours, lush scenery, lower prices and a rougher, more dangerous west-coast sea. The single best stretch is December to February; the wettest month is September; the hottest is April. For live rents by area and tower, use the BAANLYY Phuket hub.
Temperatures barely shift across the year; the real story is rainfall and sea state. Months marked ★ are the classic dry-season favourites.
| Month | Season | Typical temp | Rain & sea | Verdict |
|---|---|---|---|---|
| January | High / dry | 26–32°C | Very dry, calm sea | ★ Peak — sunniest, least humid |
| February | High / dry | 26–33°C | Dry, calm sea | ★ Peak — arguably the ideal month |
| March | High → hot | 27–34°C | Dry, calm, warming up | ★ Excellent, starting to get hot |
| April | Hot | 28–36°C | Hot & humid, mostly dry, Songkran | Good but very hot; sea still calm |
| May | Green begins | 27–33°C | First monsoon rains, sea roughening | Shoulder — cheaper, occasional storms |
| June | Green / monsoon | 26–32°C | Frequent showers, rip currents | Low-season value; watch the sea |
| July | Green / monsoon | 26–32°C | Showers with dry spells | Low season; lush, intermittent rain |
| August | Green / monsoon | 26–32°C | Wet, rough west-coast sea | Low season; rain often in bursts |
| September | Green / wettest | 26–31°C | Wettest month, strong currents | Quietest & cheapest, most rain |
| October | Green easing | 26–31°C | Wet early, easing late | Transitional; improves toward month-end |
| November | Dry returns | 26–32°C | Drying out, sea calming | Shoulder — great value, improving fast |
| December | High / dry | 26–31°C | Dry, calm, festive | ★ Peak — busy & beautiful |
Guide figures; weather varies year to year and the monsoon can arrive early or linger.
The dry / high season (Nov–Apr) is driven by the northeast monsoon, which keeps Phuket dry and sunny — peak tourist months, calmest seas, and the time most people picture when they imagine the island. March and especially April heat up sharply ahead of the rains, with April the hottest month and the Songkran water festival mid-month. The green / low / monsoon season (May–Oct) is driven by the southwest monsoon: warm, heavy showers that often pass in bursts, dramatic skies, the lushest landscapes, the lowest prices and the fewest crowds. September is the wettest month, and October can stay wet before clearing late.
This is the most important section for anyone visiting Phuket's beaches. The Andaman Sea's mood changes completely between the seasons.
The Andaman Sea is generally calm and clear along the west coast — Patong, Kata, Karon, Kamala, Surin and Bang Tao are at their best for swimming, snorkelling and boat trips to the Phi Phi and Similan islands.
The southwest monsoon pushes strong swells and dangerous rip currents onto the same west-coast beaches. Drownings happen every year — always obey the red flags, swim only between safety flags, and treat a posted warning as absolute.
Rawai, Chalong and the east are sheltered and calmer year-round but are not classic swimming beaches; they are launch points for islands, piers and marinas rather than sunbathing.
Rip-current drownings are the leading cause of tourist deaths on Phuket. The rule is simple: red flag means do not enter the water, no matter how inviting a momentary calm looks. See our full Phuket safety guide for beach-by-beach detail.
For sun, calm seas and island-hopping, target December–February; for the best balance of good weather and value, the shoulder months of November and April are hard to beat. If you are relocating rather than holidaying, the green season often brings softer short-term rents and far less competition for the best units.
| When | What to pack |
|---|---|
| Year-round | Light, breathable clothing, strong sun protection, a hat and sunglasses, reef-safe sunscreen, and good sandals — it is hot and humid in every month. |
| Dry / high season | Add a light layer for air-conditioned malls and cooler December–January evenings; book accommodation and tours early as this is peak demand. |
| Green / monsoon season | Pack a compact umbrella or rain shell, quick-dry footwear, and a dry bag for electronics; build flexibility into island day trips, which are weather-dependent. |
Because the whole island shares one climate, the weather questions that matter for renters are local: drainage and elevation. Low-lying pockets near Patong can see brief street flooding during the heaviest green-season downpours, while elevated and inland addresses drain quickly and stay comfortable. Year-round heat also makes air-conditioning efficiency and cross-breeze worth checking when you view a condo — it directly shapes your electricity bill. Explore the trade-offs area by area on the Phuket hub, and model seasonal costs with the Phuket cost-of-living guide.
November to April is Phuket's dry high season, with the sunniest skies, the calmest Andaman Sea and the safest swimming. The sweet spot is December to February, when humidity is lowest and evenings are pleasantly cooler. March is excellent but warming up, and April is hot. If you want lower prices and fewer crowds, the shoulder months of November and April offer most of the good weather at better value.
The green or monsoon season runs roughly May to October, driven by the southwest monsoon. Rain often falls in heavy bursts rather than all day, and the island is at its lushest, cheapest and quietest. September is the wettest month, and October can stay wet before clearing late in the month. Many travellers happily visit in the green season for the value and the dramatic skies.
April is typically the hottest month, with daytime highs around 34–36°C and high humidity ahead of the rains, often coinciding with the Songkran water festival. September is the wettest month, when the southwest monsoon peaks. January and February are the driest and most comfortable months of the year.
Use real caution. From roughly May to October the southwest monsoon brings powerful swells and rip currents to Phuket's west-coast beaches — Patong, Kata, Karon, Kamala, Surin and Bang Tao — and drownings occur every year. Always obey the coloured warning flags, swim only between the safety flags where lifeguards are present, and never enter the water when red flags are flying, however calm a lull may look.
Less than visitors expect, but it matters. The whole island shares the same monsoon pattern, so the bigger questions are drainage and exposure: low-lying spots near Patong can see street flooding in heavy downpours, while elevated and inland areas drain better. Green-season rents and short-term deals are often softer, so relocating in the shoulder months can save money. Each BAANLYY Phuket area guide notes the local feel, and the cost-of-living guide covers seasonal pricing.
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Whether you come for the dry-season sun or the green-season value, match the right Phuket area and condo to how you want to live.
Hero photo by Maksim Romashkin on Pexels.