March marks the start of Thailand's hot season. Early in the month, the weather is still pleasant. It's the last window of comfortable conditions in many parts of Thailand.
In March, the north is hot and dry, while the south is sunny, warm, and perfect for beaches.
In this guide, you'll get a realistic sense of how hot it really feels, where March shines, and what to watch out for so your trip stays comfortable.
How Hot Is March in Thailand?
- Temperature: 32–36°C (90–97°F) during the day, 22–27°C (72–81°F) at night
- Rainfall: 5–60 mm — mostly dry, light showers on the Gulf islands, occasional rain on the Andaman coast
- Humidity: Medium to high
- Sea Temperature: 28–30°C — perfect for swimming and snorkeling
March is one of the hottest months in Thailand. It's dry and really hot.
In inland cities like Bangkok and Chiang Mai, daytime temperatures can reach 35–38°C (95–100°F). The heat can feel like 40°C (104°F).
Southern islands like Phuket and Krabi are a bit cooler, around 30–34°C (86–93°F), but the sun is just as strong.
Rain is still minimal, so sudden storms are rare. Make sure to stay hydrated, wear sunscreen, and plan outdoor activities for early morning or late afternoon.
Average Temperatures and Rainfall in Thai Cities in March
| Destination | Min–Max Temp (°C/°F) | Rainfall (mm) | Rainy Days | Sea Temp (°C) |
|---|---|---|---|---|
| Bangkok | 24–33 / 75–91 | 9.6 | 1.8 | — |
| Ayutthaya | 23–34 / 73–93 | 7.8 | 1.4 | — |
| Kanchanaburi | 23–34 / 73–93 | 8.7 | 1.3 | — |
| Chiang Mai | 20–35 / 68–95 | 15.2 | 2.2 | — |
| Chiang Rai | 18–33 / 64–91 | 20.3 | 2.6 | — |
| Pai | 18–33 / 64–91 | 15.0 | 2.0 | — |
| Sukhothai | 24–37 / 76–98 | 20.3 | 2.8 | — |
| Khao Sok | 22–33 / 72–91 | 55 | 4.5 | — |
| Hua Hin | 24–33 / 75–91 | 15.0 | 2.0 | 28–29 |
| Krabi | 23–34 / 73–93 | 60.9 | 6.4 | 28–30 |
| Phuket | 24–33 / 76–92 | 60.9 | 6.6 | 28–30 |
| Ko Lanta | 24–32 / 75–90 | 55.0 | 5.5 | 28–29 |
| Ko Samui | 27–32 / 80–89 | 55.9 | 4.5 | 29–30 |
| Ko Tao | 27–32 / 80–89 | 50.0 | 4.0 | 29–30 |
Data source: Weather Spark.
Is March a Good Time to Visit Thailand?
Yes! March is hot, but it's still a good month to visit if you plan well.
Do your outdoor activities in the early morning or evening, and stay cool in shaded or air-conditioned places during the afternoon.
March is also the tail end of peak season. Crowds start to thin out from mid-month, so popular spots feel less packed than in January or February.
Prices begin to drop too. Flights and hotels usually get cheaper from mid-March onward.
If you want the best weather, choose early March. If you prefer lower prices and fewer crowds, mid to late March is the sweet spot.
Learn more about the Best & Worst Time to Visit Thailand.
Chiang Mai and Northern Thailand: Hot Days, Cool Mountain Escapes
Doi Inthanon National Park in MarchIn March, northern Thailand warms up quickly.
Chiang Mai and Chiang Rai are hot during the day, with afternoons reaching 35–38°C (95–100°F). Mornings are cooler at 22–25°C (72–77°F), so plan outdoor activities early to avoid the heat.
Up in Doi Inthanon, it's much cooler. It is a perfect relief from the daytime heat.
Mae Hong Son is pleasantly cool in the mornings, ideal for quiet mountain viewpoints and soaking in the scenery. Sukhothai is hotter during the day because it lies on flat.
One thing to note: March is the peak of the agricultural burning season, especially in late March. If you're sensitive to air quality, try to visit in early March.
Bangkok and Central Thailand: Hot and Humid
Wat Arun under the hot sun with few visitorsCentral Thailand in March is hot, dry, and sunny, making it a shoulder month for sightseeing before the peak heat of April. Unlike the north, air quality here is usually good, though occasional haze can drift in.
In Bangkok and Ayutthaya, mornings are still bearable early in March. By mid-month, the heat feels intense. I still remember visiting Wat Arun in Bangkok at midday. The temple was stunning, but due to the strong sun and lack of shade, I skipped the photos and headed straight for somewhere cooler.
To cool off, try water activities in Kanchanaburi—its floating houses and waterfalls are refreshing. When exploring cities, use air-conditioned transport and rest during the hottest hours (noon to 3 PM).
Southern Thailand: Perfect Beach Weather
SimilanYou get clear skies, calm seas, and great diving and snorkeling. Water temperatures hover around 28°C (82°F), ideal for swimming. Ferries run smoothly between islands.
If you love snorkeling or diving, this is prime time, especially around the Andaman coast (Phuket, Krabi, Similan), which offers stunning dive spots. The Gulf side, including Koh Samui and nearby islands, tends to be a bit quieter, making it ideal for families or couples who want some peace without sacrificing convenience.
The only challenge is popularity: beaches and resorts are busy, and rates stay high. For a quieter experience, consider day trips to less-visited islands or boutique resorts on Koh Yao Noi or Koh Lanta.
The Best Places to Visit in Thailand in March
March is hot, but it's still a great month to explore if you focus on cooler spots like jungle escapes and beaches.
Phuket and Koh Samui offer ideal beach weather, while Khao Sok gives you refreshing water-and-jungle adventures. For culture, Bangkok, Chiang Mai, and Kanchanaburi are better early in the month before the heat builds.
Check out more tips on planning a trip to Thailand.
1. Chiang Mai – Cool Mountain Escape
Doi InthanonIn March, Chiang Mai's days are hot, around 35–38°C (95–100°F), but mornings and evenings are pleasantly cooler, 22–25°C (72–77°F). Visiting early in the morning or in the evening is recommended.
Go early for alms at Wat Phra That Doi Suthep, or enjoy the sunset to experience Chiang Mai at its best.
Up in Doi Inthanon, it's 5–8°C cooler than the city, making it a perfect escape from the heat. If you visit in late March, you can see blooming flowers.
2. Bangkok – Hot Days, Lively Nights
Wat Arun night viewIn March, Bangkok is hot and humid, but it's still worth visiting if it's your first time in Thailand.
During the day, air-conditioned spots like the Bangkok National Museum or a Thai massage course keep you comfortable. In the cooler evenings, explore night markets, enjoy a rooftop bar, or take a cruise along the Chao Phraya River.
3. Kanchanaburi – A Sanctuary from the Heat
Erawan WaterfallMarch is hot, but Kanchanaburi's forested valleys feel wonderfully cool. Just two hours from Bangkok, it's an easy escape from the city heat.
You can find your oasis at the seven-tiered Erawan Falls, swimming in emerald waters as tiny fish nibble at your feet.
It is cool to end the day with a serene stay in a unique floating hotel, right in the heart of nature.
4. Khao Sok National Park – Jungle Retreat
Cheow Lan LakeMarch is the perfect window to visit Khao Sok. Being in a rainforest jungle, it feels cooler than the southern islands.
In this month, you can get the clearest lake waters, the most dramatic limestone cliffs, and the most active wildlife.
Cheow Lan Lake reaches its lowest water level, making the waters incredibly clear. A boat ride in the early morning or late afternoon is refreshing. At night, staying in a floating bungalow feels comfortably breezy.
You can hike through the jungle and might spot wildlife such as gibbons, leaf monkeys, and hornbills.
5. A Southern Island: Phuket or Koh Samui
Coral islandMarch is ideal for both islands. Days are warm and sunny, nights breezy, and the sea breeze makes it feel cooler.
If you want activity and island-hopping, choose Phuket. It's the tail end of the best season for visiting the Similan Islands, with clear waters perfect for snorkeling. Phi Phi Island also enjoys calm seas, making boat trips more enjoyable.
If you prefer calmer beaches and laid-back vibes, Koh Samui is your pick. March is perfect for private yacht trips and exploring the emerald lagoons of Ang Thong National Marine Park. The quiet beaches and clear waters make it a great escape.
What to Wear for Thailand in March
March is hot and sunny, so lightweight, breathable clothes are a must. Bring a hat, sunglasses, and plenty of sunscreen.
For evenings or northern areas like Chiang Mai, pack a light long-sleeve or a thin jacket, as mornings and nights can be cooler.
If you plan to visit temples, bring modest clothing that covers shoulders and knees.
Don't forget swimwear for beaches and islands, and comfortable shoes for walking or jungle adventures.
FAQ about Thailand Weather in March
1. Is March too hot to visit Thailand?
March is hot, especially in the north, with afternoons feeling intense. Southern islands are warmer but breezier. Plan early-morning or evening activities to stay comfortable.
2. Does it rain a lot in Thailand in March?
No. March is still part of the dry season in most regions. Rain is minimal across the country, and short showers—if they happen—are usually brief and won't affect your plans
3. Which part of Thailand has the best weather in March?
Southern Thailand has the best weather in March. Phuket, Krabi, and Koh Lanta enjoy sunny days, calm seas, and great beach conditions. Koh Samui and the Gulf side are also warm and mostly dry. The north is much hotter, with occasional haze.
Let's Customize a March Trip for You!
Tell me your travel dates and what kind of experience you're looking for. We'll help you design an itinerary that avoids the heat and makes the most of Thailand's best weather.
Or browse our Thailand private tours for inspiration.
Monthly Weather and Travel Information for Thailand
Get Inspired with Some Popular Itineraries
At Highlights Travel, we create your kind of journey — your dates, your destinations, at your pace. You can have any trip tailor made for your travel.
