Wondering about the weather in Thailand in May? Read on for a run-down of everything you need to know. Here we cover everything from average air and sea temperatures, to what to expect in terms of costs and crowds, and what to wear. In addition, we share inspirational itinerary suggestions that’ll help you make the most of your trip.
May can be a challenging time to visit Thailand. While the weather remains relatively pleasant in the north, with warm temperatures and occasional rain, the rest of the country starts to feel the effects of the approaching monsoon season. If you're planning a trip to Thailand, it's important to prepare for high humidity and unpredictable showers, especially in the central and southern regions.
The southern and central parts of Thailand can be very hot and humid, with temperatures peaking at times. If you're not a fan of extreme heat, you might want to consider visiting at a different time. However, if you're traveling to Thailand with kids, indoor attractions like Bangkok’s interactive museums or Chiang Mai’s cultural centers can be good options to escape the heat.
Despite the challenging weather in May, this month offers budget-friendly travel options, as fewer tourists mean lower prices on accommodation and flights.
Farmers farming on rice terraces in Thailand ©Shutterstock
May signals the start of the rainy season in Thailand, but it's still hot. In Bangkok, daytime highs reach 94°F (34°C), and nighttime temperatures hover around 79°F (26°C). Chiang Mai cools slightly, with highs of 93°F (34°C) and lows of 73°F (23°C).
Southern regions like Phuket, Krabi, and Samui begin to see more rain — about 10 inches (250mm) — while temperatures range from 77°F (25°C) to 90°F (32°C). Rising humidity makes it feel warmer than it actually is, and daily sunshine drops to around 6-7 hours.
Despite the increasing rain, May can still offer rewarding cultural experiences and is a quieter time for travel. If you're planning around the best time to visit Thailand, May sits on the edge of the high season and the monsoon, offering fewer crowds and lower prices — just be prepared for the occasional downpour.
Khao San road in Bangkok, Thailand @ Shutterstock
May marks the start of the low season as temperatures stay high and the first rains of the monsoon season begin. Crowds thin significantly, and prices for accommodations drop, particularly in beach destinations like Krabi, Koh Phi Phi, and Koh Lanta. If you're looking for the best places to visit in Thailand during this time, consider exploring these quieter beach spots or heading north to Chiang Mai, where the heat is slightly less intense.
While rain is more frequent, it usually comes in short bursts, leaving plenty of sunny hours for exploring. It’s a great time to find deals and enjoy quieter beaches.
Find even more options for your trip in our list of the best places to travel in May.
The Great Holy Relics Pagoda Nabhapolbhumisiri, Chiang Mai, Thailand
While going on a trip, one must consider the weather in Thailand in May and the nuances that this month brings. You may also be interested in our list of the best things to do in Thailand at any time of year.
Immerse yourself in the spiritual atmosphere of Thailand during Visakha Bucha, a Buddhist festival celebrated with great enthusiasm. Witness serene candlelight processions at temples that create a magical and spiritual atmosphere. This festival provides an insight into Thailand's deep religious traditions and cultural richness, making it a unique and educational experience.
Krabi, Thailand @ Shutterstock
Embark on a serene kayaking adventure on the enchanting Chow Lan Lake in Khao Sok National Park. Paddle among towering limestone karsts and dense rainforests, savouring the tranquillity and natural beauty of this pristine body of water.
Take part in ethical elephant encounters in Chiang Mai and Phuket, where conservation is a priority. At responsible sanctuaries, you can interact with these gentle giants on guided visits that focus on education and animal welfare. Feed them, help with bathing, and learn about the role Asian elephants have played in Thailand’s history — all while supporting sustainable tourism.
To make the most of your visit, consider where to stay in Chiang Mai for easy access to nearby sanctuaries in the surrounding hills. Likewise, choosing where to stay in Phuket can help you connect with conservation centers that offer meaningful, respectful experiences with elephants.
Immerse yourself in Thailand's cultural heritage with a Khon dance performance. This traditional art form combines elaborate masks, ornate costumes and graceful choreography depicting ancient epics and fairy tales. You'll see skillful performers bring these stories to life, providing a glimpse into Thailand's rich cultural traditions.
Elephants in Chiang Mai's Elephant Nature Park, Thailand © Shutterstock
There are several festivals and events that take place in Thailand in May. Here's our pick:
Our Thailand itineraries are crafted to help you experience the best of the country, stress-free. Think of them as a starting point — perfect for planning, but flexible enough to adjust to your own pace and interests. After all, travel is about freedom, but a little planning goes a long way.
