Thailand Tours in September 2025
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10 best Thailand trips in September 2025
Compiled by
NadineThailand travel expert at TourRadar
- Thai Intro 18 Day
- Highlights of Thailand
- River Kwai & Ancient Thai Kingdoms
- Bangkok and Ancient Capitals, Small Group Tour
- Thai Intro + Dive
- 4 Day Bangkok City Break including Amphawa Floating Market & Erawan National Park
- Trails and Gems of Siam, Small Group Tour
- Treasures of Thailand 8 Days - Chiang Mai to South, Small Group Tour (English Only)
- Incredible Thailand
- 14 Days Island Hopping In Thailand
Thai Intro 18 Day
553 Reviews by TourRadar travelers“Everything was so straightforward and easy, have booked Japan and Sri Lanka also. Highly recommend.”
Ian, traveled in June
Duration 18 days Destinations Bangkok, Khao Sok National Park, Ko Pha Ngan, Ko Phi Phi, Phuket, Chiang Mai Age Range Ages 18-39 Operator INTRO Travel September departure dates
See All Departure Dates1 Sep, 2025 10+ spaces left 3 Sep, 2025 7 spaces left From
- NZ$3,299
Highlights of Thailand
20 Reviews by TourRadar travelers“We saw so many things we wouldn't have seen without her. It was well organized, very very enjoyable!”
Carol, traveled in January
Duration 10 days Destinations Bangkok, Kanchanaburi, Ayutthaya, Sukhothai, Chiang Mai Age Range Ages 15+ Operator Intrepid Travel September departure dates
5 Sep, 2025 7 spaces left From $3,045
15% Off- NZ$2,588You save $457
River Kwai & Ancient Thai Kingdoms
13 Reviews by TourRadar travelers“We highly recommend him. Sumeth did an excellent job as our tour guide.”
Claire, traveled in December
Duration 3 days Destinations Bangkok, Ayutthaya, Kanchanaburi Age Range All Ages Welcome Operator Intrepid Travel September departure dates
See All Departure Dates7 Sep, 2025 10+ spaces left 14 Sep, 2025 10+ spaces left From
15% Off- NZ$970
Bangkok and Ancient Capitals, Small Group Tour
12 Reviews by TourRadar travelers“The hotels we were staying in were very nice.”
Nicole, traveled in September
Duration 8 days Destinations Bangkok, Ayutthaya, Kamphaeng Phet, Lampang, Chiang Mai, Lamphun, Sukhothai, Lopburi Age Range Ages 10+ Operated in English, German, Italian, French, Spanish Operator Destination Services Thailand September departure dates
See All Departure Dates2 Sep, 2025 10 spaces left 9 Sep, 2025 10 spaces left From $1,645
10% Off- NZ$1,480You save $164
Thai Intro + Dive
9 Reviews by TourRadar travelers“The tour included things I may have never seen on my own so I definitely got value for money.”
Natalie, traveled in February
Duration 13 days Destinations Bangkok, Khao Sok National Park, Ko Pha Ngan, Koh Tao Age Range Ages 18-39 Operator INTRO Travel September departure dates
See All Departure Dates1 Sep, 2025 10+ spaces left 3 Sep, 2025 7 spaces left From
10% Off- NZ$2,499
4 Day Bangkok City Break including Amphawa Floating Market & Erawan National Park
1 Review by TourRadar travelers“The entire experience, including the airport transfers, hotel accommodations, each tour, and the other tour participants were all positive memories.”
Timothy, traveled in April
Duration 4 days Destinations Bangkok, Amphawa, Erawan National Park Age Range All Ages Welcome Operator STM Tours LLC September departure dates
See All Departure Dates4 Sep, 2025 10+ spaces left 5 Sep, 2025 10+ spaces left From
10% Off- NZ$976
Trails and Gems of Siam, Small Group Tour
5 Reviews by TourRadar travelers“The highlight for me was our guide Sunny who was amazing. I enjoyed stopping at little markets and shops along the way.”
Karen, traveled in February
Duration 5 days Destinations Bangkok, Ayutthaya, Kamphaeng Phet, Lampang, Chiang Mai, Lamphun, Sukhothai, Lopburi Age Range Ages 10+ Operated in English, German, Italian, French, Spanish Operator Destination Services Thailand September departure dates
See All Departure Dates4 Sep, 2025 10 spaces left 11 Sep, 2025 10 spaces left From $1,380
10% Off- NZ$1,242You save $138
Treasures of Thailand 8 Days - Chiang Mai to South, Small Group Tour (English Only)
1 Review by TourRadar travelers“Great Tour minibus. Your every wish is considered.”
Frances, traveled in February
Duration 8 days Destinations Chiang Mai, Lamphun, Lampang, Sukhothai, Uthai Thani, Ayutthaya, Kanchanaburi, Bangkok Age Range Ages 10+ Operator Destination Services Thailand September departure dates
See All Departure Dates4 Sep, 2025 10 spaces left 7 Sep, 2025 10 spaces left From $2,305
10% Off- NZ$2,074You save $230
Incredible Thailand
4 Reviews by TourRadar travelers“Our trip was just incredible. We had the best time.”
Elias, traveled in February
Duration 16 days Destinations Bangkok, Chiang Mai, Doi Inthanon, Surat Thani, Khao Sok National Park, Krabi, Ko Phi Phi, Phuket Age Range All Ages Welcome Operator Vio Travel September departure dates
See All Departure Dates1 Sep, 2025 10 spaces left 2 Sep, 2025 10 spaces left From
10% Off- NZ$1,902
Duration 14 days Destinations Bangkok, Khao Sok National Park, Ko Pha Ngan, Koh Tao, Phuket Age Range All Ages Welcome Operator Wonderful Holidays UK September departure dates
See All Departure Dates6 Sep, 2025 10 spaces left 7 Sep, 2025 10 spaces left From $3,812
15% Off- NZ$3,240You save $572
What people love about Thailand Tours in September
- Thai Intro 9 Day
This trip was one of the best experiences of my life! My tour guides Martin and Jess were absolutely amazing and made the trip a breeze. They know so much about the country and really care about you and how much fun you're having! I would 100% go on this trip again in a heart beat and would recommend it to anyone I know! Love these guys.
- Thai Intro 12 Day
Had a great time. So glad I started on Thai intro would defiantly reccomend it people made everything so easy and got lots of device on what to do next!
- Best of Thailand - Feel Free Travel
Had such a great time with these guys. The north was amazing with the elephants, Bamboo rafting and hot springs. I was skeptical at first that 15 Days wasn’t enough but was perfect. A few of us stayed a little longer in Chiang Mai to do some ziplining. Excited to do the Sri Lanka trip now later in the year!
What our customers ask about Thailand Tours in September 2025
What is the weather like in Thailand during September?
September brings tropical weather patterns to Thailand with regional variations. Northern Thailand including Chiang Mai sees predictable afternoon showers while Bangkok maintains temperatures between 28-32°C (82-90°F) with notable humidity. The beach areas of Phuket and Koh Samui experience intermittent heavy rainfall. Recent TourRadar travelers staying at properties like the Imperial Phitsanulok Hotel and Valia Hotel Bangkok note that brief rain spells often provide welcome relief from the heat rather than disrupting travel plans.
What are the best regions to visit in Thailand during September?
The eastern Gulf coast tends to have more stable weather during September. While the northern regions of Chiang Mai and Chiang Rai see afternoon rains they remain rich in cultural activities. Central Thailand including Bangkok offers a practical mix of indoor and outdoor experiences. Travelers report success at properties like the Imperial River House Chiang Rai where they schedule outdoor activities in the morning before typical afternoon showers.
Are there any special festivals in Thailand during September?
September marks several cultural celebrations across Thailand. When the timing aligns the Chinese Mid-Autumn Festival brings energy to Bangkok's Chinatown district. Buddhist temples host ceremonies marking the end of Buddhist Lent. Visitors staying at properties like the Imperial River House in Chiang Mai find themselves well-positioned to experience these local celebrations which offer an authentic view of Thai cultural traditions.
What are the best islands to visit in Thailand during September?
The Gulf of Thailand islands (Koh Samui Koh Phangan Koh Tao) generally offer calmer conditions while Andaman Sea islands face choppier waters. Recent visitors based at the Andakira Phuket hotel report successful snorkeling trips to Phi Phi Islands though sea conditions can require flexible scheduling. The waters around Koh Samui tend to be more consistently suitable for water activities.
How much should I budget for a Thailand trip in September?
September's shoulder season status brings reduced rates across Thailand. Standard 10-day tour packages cost between USD 1000-1500 including stays at mid-range properties like True Siam Rangnam Hotel in Bangkok. Recent travelers report finding rates at upscale properties like NA NIRAND Resort at up to 30% below peak season prices making luxury stays more accessible.
What are the accommodation options in Thailand during September?
The range spans from functional 3-star hotels to luxury 5-star resorts. Bangkok's options include the practical Isanook Bangkok and the well-appointed Century Park Bangkok. In Chiang Mai properties like Na Nirand Romantic Boutique Resort cater to various preferences. The Amari Watergate in Bangkok represents the type of property that handles rainy season well with comprehensive indoor facilities.