Thailand Phuket Weather in May — Climate Guide
May in Phuket is moderate
Phuket Weather in May — Quick Answer
As of 2026- Avg temp
- 32° / 25°
- Rainfall
- 230mm · 16 days
- Crowds
- Moderate
As of 2026, Phuket in May averages a high of 32°C and low of 25°C with 230mm of rain over about 16 days. Hot + humid + rainy. Quick-dry fabrics over cotton. Packable rain jacket essential. Reef-safe sunscreen SPF 50 (sun still strong between storms). Closed-toe shoes for muddy temple paths.
May is moderate for Phuket.
May is the transition month — first half (May 1-14) still mostly dry with shoulder pricing; second half brings the southwest monsoon onset and daily afternoon thunderstorms. Similan Islands officially close May 15 for marine recovery (reopens mid-October).
Pattern after May 15: clear mornings (7-13:00) → afternoon thunderstorms (14-17:00) → clearing evenings. Schedule Phi Phi morning departures, indoor activities (spa, Old Phuket Town cafes) in afternoons, sunset dinners. Phi Phi tours run with 60-70% reliability post-May 15 (cancellations on rough-sea days).
Travel score
Monsoon transition — last dry-season prices + first afternoon storms
May Weather at a Glance
May averages 90°F / 32°C highs and 77°F / 25°C lows with 16 rainy days and 230mm rainfall — rainy days double from April. Humidity climbs to 80%. UV 11 (sun still strong between storms). Sea 29°C very warm. Sunshine drops to 7 hours. First half of month still mostly dry; second half brings true monsoon pattern.
May Travel Advice
Pre-book Phi Phi early-morning departures (7-8 AM) — afternoon tours cancellation-prone. Similan closes May 15 — book first-half-of-month dive trips 2+ weeks ahead. Phang Nga Bay (calmer protected waters) operates year-round with better reliability than Phi Phi. May 16-31 = year's best mid-range hotel value.
Flying In from Overseas
Monsoon onset = drop in tourist arrivals (regional vacationers know to avoid). Direct flights from Seoul $300-450 (year's lowest), Tokyo $250-400, Sydney $350-550. Western shoulder season. Indian wedding-season inbound brief peak (Indian school holidays).
May Pricing Trends
Monsoon shoulder pricing: Patong 4-star $50-110/night, Karon family $70-160, Trisara luxury $600-1,800. Phi Phi day tour $55-85. Year's most affordable mid-range stays start mid-May. Flights from Seoul $300-450.
Phuket May Weather Stats
Avg High
32°C
Avg Low
25°C
Rainy Days
16
230mm total
Sunshine
7h
Daily avg
Humidity
80%
high
UV Index
11
Extreme
Wind
14 km/h
Gusts 30
Sea Temp
29°C
swimming rough
Crowds
Moderate
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
22 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
36°C
Nighttime
27°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 30 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Hotels 30-40% off peak
- Less crowded
- Lush green landscapes
- Post-May 15 value window
Cons
- Monsoon starts mid-month
- Similan closes May 15
- Afternoon thunderstorms daily
- West coast sea rough
May Events & Festivals
- Monsoon starts mid-month
- Similan Islands close May 15 (national park)
- Vesak Buddha Day (mid-May)
Phuket in May — Full Picture
May is the transition month — first half (May 1-14) still mostly dry with shoulder pricing; second half brings the southwest monsoon onset and daily afternoon thunderstorms. Similan Islands officially close May 15 for marine recovery (reopens mid-October).
Pattern after May 15: clear mornings (7-13:00) → afternoon thunderstorms (14-17:00) → clearing evenings. Schedule Phi Phi morning departures, indoor activities (spa, Old Phuket Town cafes) in afternoons, sunset dinners. Phi Phi tours run with 60-70% reliability post-May 15 (cancellations on rough-sea days).
Hotel pricing drops 30-40% from peak — May 16-31 is excellent value if you can work around the rain. Karon + Kata family resorts especially affordable. Beach swimming dangerous on west coast (Patong, Kata, Karon get red flags); Mai Khao + Karon protected days still OK.
What to Wear & What to Pack
Hot + humid + rainy. Quick-dry fabrics over cotton. Packable rain jacket essential. Reef-safe sunscreen SPF 50 (sun still strong between storms). Closed-toe shoes for muddy temple paths.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current33°C
25.3°C
10/mo
Summer (Jun·Jul·Aug)
31°C
25°C
16/mo
Autumn (Sep·Oct·Nov)
31°C
24°C
16.3/mo
Winter (Dec·Jan·Feb)
32°C
24°C
4/mo
Phuket Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 32° | 24° | 3d·30mm | 9h | 73% | 10 | Very busy | Peak |
| February (Best) | 33° | 25° | 2d·20mm | 9h | 72% | 10 | Very busy | Peak |
| March (Best) | 33° | 25° | 5d·50mm | 9h | 73% | 11 | Busy | Peak |
| 34° | 26° | 9d·100mm | 9h | 75% | 11 | Busy | Peak | |
| 32° | 25° | 16d·230mm | 7h | 80% | 11 | Moderate | Shoulder | |
| 31° | 25° | 15d·220mm | 7h | 80% | 10 | Moderate | Low season | |
| 31° | 25° | 16d·230mm | 6h | 80% | 10 | Busy | Shoulder | |
| 31° | 25° | 17d·240mm | 6h | 80% | 10 | Busy | Shoulder | |
| 31° | 24° | 18d·270mm | 6h | 82% | 10 | Moderate | Low season | |
| 31° | 24° | 18d·280mm | 6h | 80% | 10 | Moderate | Low season | |
| 31° | 24° | 13d·180mm | 7h | 78% | 9 | Busy | Shoulder | |
| December (Best) | 31° | 23° | 7d·80mm | 8h | 75% | 9 | Very busy | Peak |
View Other Months
Phuket May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Phuket?
Phuket in May is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Phuket in May?
Phuket May averages a high of 32°C and a low of 25°C.
Does it rain much in Phuket in May?
Phuket May averages 230mm of rainfall over about 16 rainy days.
What should I wear in Phuket in May?
Hot + humid + rainy. Quick-dry fabrics over cotton. Packable rain jacket essential. Reef-safe sunscreen SPF 50 (sun still strong between storms). Closed-toe shoes for muddy temple paths.
What time are sunrise and sunset in Phuket in May?
Phuket May sunrise is 06:10 and sunset is 18:35, with 12h 25min of daylight.
What's the air quality like in Phuket in May?
Phuket May air quality (AQI) averages 35, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Phuket in May?
In May, Phuket is great for Morning Phi Phi (May 1-14), Big Buddha + Wat Chalong, Phang Nga Bay (calmer).
Is May peak season in Phuket?
Phuket May crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Phuket
View Other Months
Planning a May trip to Phuket?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.