Thailand weather in May

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.

The weather in Thailand in May at a glance

• In May average temperatures hover between 82°F-91°F (28-33°C).
• It's quieter, but be ready for some heat and rain.
• You can expect intense humidity and afternoon showers.
• If you're not a fan of crowds, May is a great time to visit. Just keep an eye on the weather for your plans.

Is May a good time to visit Thailand?

May can be a challenging time to visit Thailand. While the weather remains relatively pleasant in the north of Thailand, with warm temperatures and occasional rain, the rest of the country can already hear the echoes of the coming monsoon season. 

The southern and central parts of Thailand can be very hot and humid, with temperatures peaking at times, so if you're not a fan of extreme heat, it's worth considering visiting Thailand at a different time.

Despite the challenging weather in Thailand in May, this month can offer more budget travel options due to fewer tourists.

Ready to explore Thailand? Embark on your dream trip hassle-free with the help of our Thailand travel experts.

Average daily temperatures in May

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). 

The south, including Phuket, Krabi and Samui, experiences more rain, with about 10 inches (250mm) of precipitation and temperatures between 77°F (25°C) and 90°F (32°C). The humidity levels rise significantly across the country, making it feel warmer than the actual temperature suggests. 

Daily sunshine drops to around 6-7 hours in many areas. Despite the rain, May can still be a good time for cultural experiences and indoor activities, though beach days in the south might be interrupted by sudden showers.

Ready to embark on a Thailand adventure? Don't miss our Thailand itineraries and information on how to get there. 

What about the crowd & cost?

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. 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 vacation destinations in May.

What to do in Thailand in May

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.

Visakha Bucha Festival

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.

Kayak in Khao Sok National Park

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. 

Elephant encounters

Take part in elephant ethical and conservation activities in Chiang Mai and Phuket. Interact with these gentle giants in responsible sanctuaries and on guided tours. Feed, bathe and learn about Asian elephants while contributing to their well-being. Learn about Thailand's rich history and appreciate wildlife conservation in a meaningful and sustainable way.

Witness the Khon Thai Masked Dance

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.

Festivals and events in Thailand in May

There are several festivals and events that take place in Thailand in May. Here's our pick:

• Royal Plowing Ceremony: Ancient Brahmin ritual marking the start of rice-planting season. The King or his representative plows a field while Brahmin priests sow rice seeds. Predicts agricultural fortune.
• Visakha Bucha Day: Celebrates Buddha's birth, enlightenment, and death. Devotees visit temples, make merit, and join candlelit processions. Many temples display elaborately decorated trees representing the Bodhi tree.
• Bun Bang Fai (Rocket Festival): Vibrant Isaan festival featuring homemade rockets launched to encourage rainfall. Includes parades, folk music, dance performances, and rocket competitions. Blends animist beliefs with Buddhist traditions.
• Samui Regatta: Premier sailing event in the Gulf of Thailand. Attracts international yachting teams for a week of races around Koh Samui. Features social events and parties for participants and spectators.

Plan your trip with our Thailand itineraries

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.

• Thailand itinerary 7 days: A week in Thailand is just enough to see the highlights, usually a mix of Bangkok, one cultural destination, and some beach time.
• Thailand itinerary 10 days: Ten days lets you explore multiple regions, such as Bangkok, northern Thailand, and a few days on the coast.
• Northern Thailand itinerary: A focused trip on northern Thailand’s unique charm, covering lush mountains, temples, and local hill tribe cultures.
• Southern Thailand itinerary: Discover the beauty of Thailand’s south, known for its stunning islands, beaches, and marine life. Perfect for beach lovers and those seeking a laid-back, tropical escape.
• Krabi itinerary: Explore Krabi’s famous limestone cliffs, emerald waters, and hidden beaches. Great for adventure enthusiasts with options for island hopping, rock climbing, and snorkeling.
• Phuket itinerary: A Phuket trip offers a mix of vibrant nightlife, beautiful beaches, and cultural sites. Expect lively markets, water activities, and a range of beach resorts.
• Chiang Mai itinerary: Discover Chiang Mai’s rich cultural heritage, from ancient temples to bustling night markets. Ideal for travelers looking for a blend of history, local crafts, and lush mountain scenery.