What is on in Phuket in mai?
Chine May Day holiday (1–5 mai 2027); National Labour Day (1 mai 2027); Coronation Day (4 mai 2027); Visakha Bucha (20 mai 2027).
Phuket in mai: events, weather, sea, crowds and prices
The monsoon returns, the Similan park closes, and the rate card drops to its low-season level almost overnight.
Dataset checked 2026-09-08: 39 entries covering septembre 2026 to décembre 2027, of which 17 carry an approximate date. Weather and crowd figures on this page are medians from our climate and tourism datasets.
mai in numbers
343 mm
Median rain
28 jours
Rain days
29.8 °C
Daily high
légère houle
West-coast sea
31.0 °C
Sea temperature
1,010,535
Guest arrivals, median
74.0 %
Occupancy
Open
Similan islands
Source: Open-Meteo (ERA5), 2015–2026; Ministry of Tourism and Sports, Thailand · Toutes les sources
What is on in Phuket in mai
Source-market holiday
Chine May Day holiday
1–5 mai 2027 · approximate · Chine
A brief arrivals bump in a month whose rates are falling, so it shows up in occupancy rather than in price. Worth knowing if you want a quiet early-May island trip: the first week is not it.
Thai public holiday
National Labour Day
1 mai 2027
Almost none on the island. Rates are already switching to low season; the visible effect is a short Chinese and Thai domestic long weekend at the start of the wet months.
Thai public holiday
Coronation Day
4 mai 2027
No commercial effect. It marks the point at which the low-season rate card is fully in force while the west-coast sea is often still calm — the value week that experienced returnees book.
Thai public holiday
Visakha Bucha
20 mai 2027 · approximate
Alcohol sales suspended island-wide for the day; government offices closed. No effect on rates — May is low season and the holiday is domestic.
Seasonal windows covering mai
Green season (south-west monsoon)
1 mai – 30 septembre 2027
The low half of the index. Hotel and villa medians sit well below the November-to-April figures, tours discount, and the trade-off is the sea rather than the sky: swimming on the west coast is unreliable, and Phang Nga Bay, Phuket Town and the east coast carry the itinerary.
West-coast swell and red-flag season
1 mai – 31 octobre 2027
Explains the low-season discount better than the rain does. It is also the reason island day trips are cancelled at short notice between May and October: book refundable, and treat a calm west-coast beach day as a bonus rather than the plan.
Similan and Surin islands season
15 oct. 2026 – 15 mai 2027
The single hardest constraint on a Phuket itinerary: a trip planned between 16 May and 14 October cannot include the Similans at all. Inside the window, December to February sells out first and April is the quietest month with good sea.
Weather and sea in mai
Medians per calendar month over 2015–2025. Open-Meteo (ERA5), 2015–2026.
A median mai carries 343 mm of rain over 28 days, of which 4 bring more than 20 mm. Daily highs sit around 29.8 °C and nights around 25.6 °C, with about 298 hours of sunshine in the month and humidity near 86%. The sea off the west coast is légère houle: a median mai has 4 rough-sea days, and the surface water sits around 31.0 °C.
Mu Ko Similan National Park is open in mai.
| Month | Median rain | Rain days | Daily high | Nightly low | Sunshine | Rough-sea days |
|---|---|---|---|---|---|---|
| janvier | 37 | 10 | 29.5 | 24.4 | 329 | 0 |
| février | 21 | 7 | 30.7 | 24.7 | 312 | 0 |
| mars | 73 | 14 | 31.7 | 25.4 | 343 | 0 |
| avril | 183 | 25 | 30.7 | 25.7 | 311 | 0 |
| mai | 343 | 28 | 29.8 | 25.6 | 298 | 4 |
| juin | 275 | 22 | 29.3 | 25.9 | 284 | 8 |
| juillet | 241 | 24 | 29.2 | 25.8 | 279 | 13 |
| août | 270 | 25 | 28.9 | 25.3 | 277 | 9 |
| septembre | 309 | 25 | 28.7 | 24.8 | 248 | 12 |
| octobre | 340 | 28 | 29.0 | 24.4 | 286 | 2 |
| novembre | 270 | 27 | 28.7 | 24.5 | 260 | 0 |
| décembre | 113 | 16 | 29.2 | 24.1 | 298 | 0 |
Crowds and prices in mai
A median mai brings 1,010,535 hotel guest arrivals in Phuket with occupancy around 74.0%, which makes it the 8th busiest month of the twelve in the Ministry of Tourism and Sports series. Occupancy at this level is what pushes hotel and villa rate cards to their high-season level, and it is why the island’s best inventory is committed months ahead.
mai sits in the low half of the year: hotel and villa rate cards are at their low-season level and most things can be booked at short notice.
| Segment | Médiane | n | Relevé |
|---|---|---|---|
| Hôtel 3★, médiane de l’île par nuit | $34 | 177 | septembre 2026 |
| Hôtel 4★, médiane de l’île par nuit | $62 | 210 | septembre 2026 |
| Hôtel 5★, médiane de l’île par nuit | $141 | 87 | septembre 2026 |
| Villa 3 chambres, médiane de l’île par mois | $3,975 | 125 | septembre 2026 |
Current island medians, observed septembre 2026, with the sample size behind each figure. The index has one observation month so far, so no per-month price history exists yet — it accrues from septembre 2026. Indice des prix →
Source: Ministry of Tourism and Sports, Thailand, 2023–2025 · Toutes les sources · 2026-09-05
May is the hinge of the Phuket year. The south-west monsoon arrives in the first half, the west-coast swell begins and the Similan park closes on the fifteenth. Rain in May is not the all-day grey many visitors imagine: it is an hour or two of hard afternoon downpour, often with a clear morning either side, and the mornings are exactly when the sea is at its calmest.
Prices fall further and faster than the weather worsens, which is what makes early May the value week the returnees book. The high-season supplements come off, villas that cost a fortune in January are affordable by the month, and restaurant tables and boat seats are freely available.
The trade-off is reliability rather than quality. A May week can be nearly perfect or half rained-out, and the west-coast red flags start appearing. The itinerary that works is the one with an east-coast and Phang Nga Bay fallback: those are sheltered from the swell and work through the whole monsoon.
Who mai suits
- Budget travellers and long-stayers taking the low-season rate.
- Surfers — the west-coast swell is what the Kata and Kalim boards are for.
- Anyone who can be flexible day to day.
Who should pick another month
Anyone whose whole plan is the Similan islands, and anyone who needs guaranteed beach weather on fixed dates.
Questions about mai
What is the weather like in Phuket in mai?
A median mai has 343 mm of rain over 28 days, daily highs around 29.8 °C and nights around 25.6 °C, from eleven years of reanalysis data. Mu Ko Similan National Park is open in mai.
Can you swim on the west coast beaches in mai?
Usually, with care. A median mai has 4 rough-sea days on the west coast, so red flags appear on a meaningful share of days and the rip currents behind them are the real danger. The east and south coasts and Phang Nga Bay are sheltered and work throughout.
Is mai an expensive month in Phuket?
mai sits in the low half of the year: hotel and villa rate cards are at their low-season level and most things can be booked at short notice.