Best Time to Visit Thailand: Month-by-Month & Two-Coast Guide
The best time to visit Thailand is the cool dry season (November–February) for comfortable weather and sunny beaches. Full guide to the hot and rainy seasons, plus the two-coast rain trick.
Quick answer
The best time to visit Thailand is the cool, dry season from November to February — comfortable temperatures, low rainfall and sunny beaches nationwide. March to May is very hot, and June to October is the rainy (monsoon) season, though rain often falls in short afternoon bursts. Crucially, the two coasts have offset rain patterns, so you can often dodge the worst weather by switching between the Andaman side (Phuket, Krabi) and the Gulf side (Koh Samui).
Key takeaways
- Best overall: November–February — cool, dry and sunny, the peak season for good reason.
- Hot season: March–May, intense heat; mid-April is the Songkran water festival.
- Rainy season: June–October, greener and cheaper, with mostly short afternoon downpours.
- Two-coast trick: the Andaman coast is wettest May–October; the Gulf (Samui) is wettest October–December — pick the drier one for your dates.
- Book well ahead for December–January, the busiest and priciest window.
The short answer
Thailand has three broad seasons, and the famous high season exists for good reason — but the shoulders and even the rains have their upsides, and the country’s geography lets you outsmart the weather.
Thailand month by month
| Month | Season | Weather | Verdict |
|---|---|---|---|
| Nov | Cool/dry begins | Sunny, comfortable | Excellent |
| Dec–Jan | Cool/dry (peak) | Sunny, pleasant | Excellent (busy) |
| Feb | Cool/dry | Warm, dry | Excellent |
| Mar–Apr | Hot | Very hot; Songkran mid-Apr | Hot |
| May | Hot/wet begins | Hot, humid, storms | Mixed |
| Jun–Sep | Rainy | Afternoon downpours; green | Cheaper |
| Oct | Rainy (wettest) | Heavy rain many areas | Wettest |
Season by season
Cool season (November–February)
Peak season, and rightly so — the most comfortable temperatures, low humidity and little rain, ideal for beaches, islands and exploring Bangkok and the north (Chiang Mai). It’s also the busiest and priciest, especially around Christmas and New Year, so book ahead.
Hot season (March–May)
Temperatures climb, often above 35°C (95°F) with high humidity, peaking in April — which is also when the joyous Songkran (Thai New Year) water festival takes over the country in mid-April, a genuine highlight if you time it deliberately. Otherwise the heat can be draining for temples and cities, though the islands stay appealing.
Rainy season (June–October)
The southwest monsoon brings rain, usually as heavy afternoon or evening downpours rather than constant grey. Landscapes are lush, crowds thin and prices fall; September and October are the wettest. This is where the coasts differ.
The two-coast trick
Thailand’s beach regions have offset rainy seasons. The Andaman coast (Phuket, Krabi, Phi Phi) is wettest roughly May–October, while the Gulf coast (Koh Samui, Koh Phangan) sees its heaviest rain later, around October–December. So even in the “wet” months you can usually pick a drier coast — the Gulf tends to be the better bet mid-year.
Festivals and events
Two stand out. Songkran (mid-April) is the exuberant nationwide water fight marking Thai New Year. Loy Krathong and the northern Yi Peng lantern festival (usually November) are beautiful, with floating baskets and sky lanterns — and they coincide with the start of the best weather.
When it’s cheapest and when to avoid
Best weather is November–February; best value is the rainy season (June–October), if you plan around showers and pick the drier coast. Come in April for Songkran, expecting heat. The costliest window is Christmas–New Year.
How long to go
Ten days to two weeks lets you combine Bangkok, the north (Chiang Mai) and a stretch of islands or beaches. See our Bangkok guide for the city.
Weather and temperatures in detail
Thailand is tropical and warm year-round. Bangkok and the central plains sit around 28–35°C (82–95°F), climbing higher in the March–May hot season and easing at night during the cool season. The north (Chiang Mai) is more comfortable in the cool months, with genuinely cool mornings and evenings in December and January, while the south and islands stay hot and humid throughout. Humidity is high everywhere in the rainy season, and sea temperatures on both coasts remain warm all year.
What to pack
- Year-round: light clothing, strong sun protection, and modest cover for temples (shoulders/knees).
- Rainy season: a light rain jacket and quick-dry clothes.
- North in cool season: a light layer for cooler evenings and higher elevations.