Best Time to Visit Thailand from Kolkata — Month-by-Month Guide 2026

Thailand's best month weather-wise. Cool (25°C in Bangkok, 27°C in Phuket), dry, and clear. Chinese New Year falls late January–February — Bangkok and Phuket see major celebrations. Perfect beach weather in Phuket, Krabi, and Koh Samui.

Arguably Thailand's most pleasant month — not as crowded as December–January but still superb weather. Chiang Mai's flower festival (February first weekend) is spectacular. Beaches are gorgeous throughout the Gulf and Andaman coasts.

Excellent weather persisting. Bangkok gets warmer (32°C). Last month before the hot season peaks. Great for Northern Thailand trekking before the heat and haze season begins.

Thailand's most famous festival: Songkran (Thai New Year/Water Festival), April 13–15 — nationwide water fights. Bangkok, Chiang Mai, and Phuket are packed. Prices spike 2–3x. Book a year in advance if visiting during Songkran itself. Avoid mid-April if crowds stress you out.

Southwest monsoon arrives on the Andaman Coast (Phuket, Krabi, Koh Lanta) — some rain from May. However, Bangkok, Chiang Mai, and the Gulf Coast (Koh Samui, Koh Tao) are still excellent. Great time for Northern Thailand and Chiang Mai sightseeing.

Southwest monsoon is well established on the Andaman Coast (Phuket, Phi Phi, Krabi — rough seas). Head to the Gulf Coast instead: Koh Samui, Koh Tao, Hua Hin. Bangkok is manageable with brief heavy showers. Lowest prices of the year.

Both coasts get rain — the monsoon affects the Gulf Coast too (though less dramatically). Bangkok is hot and rainy. Chiang Mai and Northern Thailand are green and beautiful. Good for culture, cooking classes, and temple-heavy itineraries.

Similar to July but late August sees improving conditions on the Gulf Coast. The Phi Ta Khon ghost festival (if scheduled) and Buddhist candle festivals occur. Good for budget travelers who can work around weather.

September is statistically Thailand's rainiest month — the fewest tourists of any month and the lowest prices. Not recommended for first-time visitors. If you must travel, Bangkok's indoor attractions, night markets, and shopping malls are great. Chiang Mai is sometimes haze-free (depends on forest burning).

Early October still rainy; late October sees conditions improving dramatically. The Vegetarian Festival in Phuket (October–November) is a fascinating (intense) cultural experience. By month-end, both coasts are improving.

The Andaman Coast (Phuket, Krabi, Phi Phi) transitions to dry season — excellent. Koh Samui and the Gulf Coast are at their rainiest in November (northeast monsoon). Yi Peng lantern festival in Chiang Mai (usually November) is one of Asia's most magical events.

Thailand's number one tourist month — perfect dry weather on Phuket, Krabi, and Phi Phi. Christmas and New Year's Eve celebrations are massive, especially at beach destinations. Book 3–6 months ahead for December. Phuket NYE beach parties are legendary.

Q: What is the best time to visit Thailand from Kolkata?

A: November to February (Thailand's cool-dry season) is the universally best window for visiting Thailand — excellent weather across all regions, perfect for both beach holidays on Phuket/Krabi and culture trips in Bangkok/Chiang Mai. March–May is also great but gets progressively hotter. The month of April has Songkran (Water Festival) — spectacular but extremely crowded.

Q: Is Phuket good to visit in June or July?

A: June and July are Phuket and Krabi's monsoon months — expect heavy rain, rough seas, and some boat services suspended (Phi Phi Island day trips can be cancelled). If you're set on visiting Thailand in June–July, head to the Gulf Coast (Koh Samui, Koh Tao, Hua Hin) instead, which gets the opposite monsoon pattern and has better weather at this time.

Q: When is Songkran in Thailand?

A: Songkran is on April 13–15 officially, but celebrations extend from April 12–17 in many cities. Bangkok celebrates for 5–7 days, Chiang Mai for up to 2 weeks. It's the world's biggest water fight festival — an extraordinary experience if you embrace it. Hotels fill up months in advance and prices triple. Not suitable for those wanting a quiet beach holiday.

Q: Can I visit Thailand in October?

A: Late October is a good time to visit — conditions improve significantly on the Andaman Coast (Phuket, Krabi) by late October, and the Vegetarian Festival in Phuket is culturally fascinating. Early October can still be rainy. The Gulf Coast (Koh Samui) hits its rainy season in October–November, so avoid those islands in October.

Q: What is the best time for Chiang Mai?

A: November to February is Chiang Mai's ideal period — cool (15–22°C nights), dry, and perfect for trekking, elephant sanctuaries, and temple visits. February brings the beautiful Flower Festival; November has Yi Peng lantern festival (one of Asia's most photogenic events). Avoid March–April when smoke haze from agricultural burning can obscure views.