Thailand in May 2025
Hot season - best for beaches and island hopping. Discover the best destinations, weather outlook, and events happening this month.
Weather in May
Temperature
30°C
Min 25°C / Max 34°C
Rainfall
190mm
14 rainy days
Crowds
Low
Best value
| Region | Temp | Rain | Humidity |
|---|---|---|---|
| Central Thailand | 30°C | 190mm | 78% |
| Northern Thailand | 27°C | 150mm | 75% |
| Southern Thailand | 28°C | 270mm | 82% |
| Isaan (Northeast) | 28°C | 200mm | 75% |
Travel Scores for May
Weather-based scores to help you decide if May is right for your trip type.
Best for sightseeing, temples, and outdoor activities
Best period: March - May
Best for swimming, sunbathing, and water activities
Best period: November - April (Andaman) / January - September (Gulf)
Humidity
78%
Feel
Muggy
High humidity makes it feel hotter - stay hydrated
Best Beaches in May
Thailand has two distinct coastlines with opposite monsoon patterns. Here's where to go for the best beach conditions.
Monsoon transitioning. Some rough days, but diving possible at sheltered sites.
Rainfall
270mm
Calm seas and excellent visibility. Perfect for diving, snorkeling, and beach activities.
Rainfall
130mm
Islands closing mid-May. Last chance before monsoon.
Rainfall
300mm
- • Similan Islands National Park closed (May 15 - Oct 15)
- • Surin Islands National Park closed (May - Oct)
- • Koh Lipe has limited ferry service (May-Oct) - some resorts close
- • Tarutao National Park closed (May 15 - Nov 15)
- • Koh Tachai remains closed for environmental recovery
Destinations for May 2025
Based on weather conditions, crowd levels, and seasonal events
Top Picks for May
These destinations offer the best weather conditions, activities, and experiences during May. Plan your trip to one of these locations for an optimal Thailand experience.
Northern Thailand
Temp
27°C
23-33°C
Rain
150mm
14 days
Sun
6hrs
daily avg
Humidity
75%
Why visit in May:
- Perfect temperatures for outdoor activities
- Expect afternoon showers - carry an umbrella
Events & Festivals in May
Royal Ploughing Ceremony
May (date varies)
Sanam Luang, Bangkok
Ancient Brahmin ceremony marking the start of rice planting season, held at Sanam Luang in Bangkok.
Visakha Bucha Day
Full moon in May
The most important Buddhist holiday, marking Buddha's birth, enlightenment, and death. Temples hold special ceremonies.
Bun Bang Fai (Rocket Festival)
Second weekend of May
Yasothon
Spectacular festival in Isaan featuring massive homemade rockets launched to bring rain for the rice planting season.
- Lightweight, breathable clothing
- Comfortable walking shoes
- Sunscreen (SPF 30+) and sunglasses
- Reusable water bottle
- Wide-brimmed hat for sun protection
- Swimwear and beach cover-up
- Cooling towel for outdoor activities
- Book accommodation in advance, especially during holidays
- Plan outdoor activities for early morning or late afternoon
- Stay hydrated - carry water at all times
- Air-conditioned venues provide relief during midday
- Great time for budget travelers - negotiate for better rates
- Enjoy attractions without the crowds
Accommodation
-30%
Best deals of the year
Flights
Low
Good availability
Tours & Activities
Negotiable
Plenty of availability
Frequently Asked Questions about May
Explore Other Months
Ready to Explore Thailand in May?
Check out our destination guides and start planning your trip.