Thailand travel guide
Thailand in May is hot and wetter, with highs near 34°C, lows near 27°C and about 155 mm of rain. Lower prices are the draw, but showers increase and some island boat services may reduce. It suits flexible travellers and bargain hunters.
Facts checked 2 Nov 2026
Hot and wetter; lower prices but showers increase.
This guide explains what Thailand is like in May: the weather, how busy it is, what to plan and who the month suits. Figures are typical values from our destination research, so check a forecast before you travel.
Daytime highs reach about 34°C and lows about 27°C. Rainfall is around 155 mm for the month and humidity is about 76 percent. May marks the start of the rainy season in much of the country. Highs reach about 34°C and lows about 27°C, while humidity climbs to about 76 percent. Rain jumps to about 155 mm, usually as heavy showers that pass.
May suits budget-minded travellers, repeat visitors and couples who prefer fewer crowds and can adapt to weather. It is less suitable for first-time beach holidays that need reliable sun.
May is wetter than April, with rain more than doubling, and similar in rain to June and July. The main benefit over April is lower prices and fewer festival crowds.
After the April peak, May is when hotels start to offer lower prices, and the trade-off is more showers. Sea conditions on the Andaman coast become less predictable, so island excursions need flexibility and some boat services may reduce. The Gulf side, including Koh Samui, often sits in a drier period from January to August, so it can be the better beach choice. Bangkok remains hot, so keep sightseeing early. Carry a light rain jacket, use covered footwear for wet pavements and build rest into each day. Our packages are land-only, so flights are booked separately.
This guide is compiled from published tourism and weather information and traveller reports about Thailand, and was last checked on 2 November 2026. Weather, prices and schedules change, so confirm details before you book.
See the full best time to visit Thailand guide, plan your days with places to visit in Thailand and things to do in Thailand, and browse our Thailand tour packages. The Thailand Highlights 6N package balances Bangkok with a beach stay. Compare April and June.
Ready-made trips
Bangkok 2N · Pattaya 2N
Phuket 3N · Krabi 2N
Bangkok 2N · Phuket 3N
*Approximate price per person, excl. GST. Contact us for exact pricing.
Packages cover stays, transfers, sightseeing and meals as listed. Flights are not included. Prices are per person, excl. GST.
FAQs
Short answers to what travellers ask about Thailand.
Thailand in May has daytime highs near 34°C and lows near 27°C, with about 155 mm of rain and humidity around 76 percent. Check the forecast closer to your dates, because weather varies by region and by year.
May is hot and wetter, with about 155 mm of rain. Prices are lower, but showers increase and boat plans need flexibility. Consider the Gulf islands if you want beach time.
Rainfall in May is around 155 mm for the month, across the country. The Andaman and Gulf coasts have different patterns, so check the coast you plan to visit and keep one flexible day for outdoor plans.
Pack light, breathable clothing, sun protection and comfortable shoes, plus a light rain jacket if showers are likely. Carry covered clothing for temples, with shoulders and knees covered, and insect repellent for the evening.
Pricing depends on the season and demand, and our research suggests it is softer outside the peak months. Ask your planner for a written quote for your exact dates. Our packages are land-only, so flights are extra.
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