September 2026 in Thailand: Festivals and Major Events

September in Thailand offers a gentle start to the season with cultural highlights, music and dance performances, international festivals, and exciting sports challenges. Here’s the full program for the month.

National Event in September

Thai National Flag Day

Under King Rama VI, the tricolor flag, known as thong trai rong, was officially adopted on September 28, 1917. Since then, September 28 has been recognized as Thai National Flag Day, celebrated across the country.

Thailand National Flag: History, Symbols and the September 28 Celebration

The Thai national flag, the Thong Trairong, embodies the nation, Buddhism, and the monarchy. On September 28, Thailand commemorates its official adoption with National Flag Day.

Festivals in September

Bangkok Gems & Jewellery Fair 2025 – Bangkok

The Bangkok Gems and Jewellery Fair is Asia’s oldest trade exhibition of its kind. Organized by the Department of International Trade Promotion (DITP) and the Gem and Jewelry Institute of Thailand (GIT), the fair showcases a wide range of products, from raw gemstones to finished jewelry.

Phanom Rung Light Phenomenon (Sunrise) – Buri Ram

Visitors can witness the sunrise shining perfectly through the 15 doorways of Prasat Hin Phanom Rung. This natural phenomenon occurs four times a year, with two sunrises in April and two in September.

Cultural Events in September

Traditional Boat Races Festival of Phichit

The program features spectacular competitions on the Nan River with traditional boats and crews from local and regional communities. There will also be religious ceremonies including Buddhist rituals and boat blessings.

Feel All The Feelings @ Ratchaburi

Feel All The Feelings @ Ratchaburi offers the public four days of artisan exhibitions featuring local products, traditional crafts, and contemporary creations. Cultural performances will also take place, including dance, music, and artistic shows highlighting Ratchaburi’s identity. In addition, markets will showcase local food and regional specialties.

Thai Way of Life Festival – Chon Buri

A small festival promoting the cultural and craft heritage of Chon Buri, featuring local products, food stalls, traditional crafts, and contemporary creations.

Lae Ngam Nam Tok Festival – Nakhon Ratchasima

The program includes traditional dances, music, and artistic performances. Artisan exhibitions will feature local crafts and regional products. Community markets will also highlight local cuisine and specialties.

Music in September

Bangkok International Dance and Music Festival

The Bangkok International Dance and Music Festival 2026 will take place from September 5 to October 17 at the Thailand Cultural Centre, featuring 13 performances ranging from classical opera to contemporary dance and hip‑hop. The event highlights prestigious international companies, including the New York City Opera, the Bolshoi of Belarus, the Helikon Opera, the Eifman Ballet, as well as French choreographer Sadeck Berrabah.

Bangkok International Music Festival – BIMF 2026

Suphan Buri Music Festival 2026

Suphan Buri hosts its music festival with three days of free concerts, offering a diverse lineup including Palmy, Season Five, Tattoo Colour, Freehand, No One Else, Hai Aphaporn, Ratchamesith Nokjak, and more.

Music and Night at the Museum #5

The Songkhla National Museum will host Music and Night at the Museum #5 on September 11 and 12, 2026, from 5:00 PM to 9:00 PM. This free event (guided tours excluded) features a craft market, concerts under the stars, sky observation, and creative workshops.

Sports in September in Thailand

Khao Chi Chan Marathon 2026

Khao Chi Chan is famous for its giant Buddha carved into the mountain, offering a spectacular backdrop for the race.

Bangsaen10 – 2026

Scenic Half Marathon Krabi

The Scenic Half Marathon Krabi is a spectacular coastal race between Ao Nang Beach and Krabi Town, offering views of paradise beaches, limestone cliffs, and islands. The event features several distances (3K, 5K, 10K, 21K) on roads and beaches, with a festive atmosphere blending nature, local culture, and conviviality. Courses are suitable for families and lovers of tropical landscapes.

PHANGNGA21 – All People One Heart

This event offers three running formats on September 6, 2026: a half marathon (21 km), a mini marathon (10.5 km), and a fun run (5 km). It promotes sport for health and welcomes both experienced runners and amateurs.

Wat Laharn Rai Half Marathon 2026 (5th edition)

ECBA TRAIL 2026 Songkhla

Khanom Beach Run & Half Marathon 2026

Races held in a friendly seaside atmosphere for both amateur and experienced runners.

Pattaya Marathon 2026

The Pattaya Marathon 2026 is one of Thailand’s iconic races, combining sporting challenge with a seaside atmosphere.

Phuket Trail 2026

Loma Run on the Beach – Pattaya

The Loma Run is a friendly charity race in Pattaya, with distances of 5K, 10K, and 21K suitable for all levels. The course combines urban roads with a beach finish, offering a sporting and supportive experience in a warm community atmosphere. Scheduled for Sunday, September 20, 2026, the event is supported by local volunteers and celebrates seaside community spirit.

Cultural Events in Thailand

49th Khong Dee Mueng Nara Fair 2026

King Rama V Memorial Park hosts a vibrant cultural festival blending crafts, gastronomy, and local traditions. Highlights include dove‑song contests, Silapacheep exhibitions, Krajud fair, and spectacular traditional boat races. The event celebrates the identity of Southern Thailand in a festive, family‑friendly atmosphere at the heart of Narathiwat.

Akha Swing Festival 2026

The Akha Swing Festival celebrates the Akha New Year and honors the goddess E‑Um Sa Yae, with giant swing rituals, traditional attire, and cultural performances. The main event takes place September 5–6 at Sam Yaek Akha Village, featuring shows, tribal markets, gastronomy, and community games. Additional celebrations are held at Ban Phahee and Doi Pha Mee, offering a rare immersion into the living heritage of Northern Thailand’s mountain tribes.

Calendar of Events in Thailand – September 2026

FAQ – Events in Thailand in September 2026

What are the main events in Thailand in September 2026?

The main events include cultural festivals, traditional celebrations, music festivals, and numerous sporting competitions. Key highlights are the Bangkok International Dance and Music Festival, the Bangkok Gems & Jewellery Fair, the Pattaya Marathon, and the Khong Dee Mueng Nara Fair.

Which cultural festivals take place in Thailand in September 2026?

Several cultural festivals are organized in September, including the Traditional Boat Races Festival of Phichit, Feel All The Feelings in Ratchaburi, the Thai Way of Life Festival in Chon Buri, the Lae Ngam Nam Tok Festival in Nakhon Ratchasima, and the Khong Dee Mueng Nara Fair in Narathiwat.

Where can visitors see traditional festivals in September in Thailand?

Visitors can attend traditional events across the country. Phichit hosts its famous boat races, while Chiang Rai organizes several events linked to Akha culture. Narathiwat also hosts the Khong Dee Mueng Nara Fair.

Which events take place in Bangkok in September 2026?

Bangkok hosts the Bangkok International Music Festival on September 5, the Bangkok International Dance and Music Festival from September 5 to October 17, and the Bangkok Gems & Jewellery Fair from September 8 to 12.

Which music festivals are scheduled in Thailand in September 2026?

The calendar includes the Bangkok International Music Festival, the Suphan Buri Music Festival, and the Bangkok International Dance and Music Festival. In Songkhla, Music and Night at the Museum #5 also offers concerts on September 11–12.

Which marathons and races are organized in Thailand in September 2026?

The sports calendar features the Khao Chi Chan Marathon, PHANGNGA21, the Wat Laharn Rai Half Marathon, the Scenic Half Marathon Krabi, Phuket Trail, Bangsaen10, the Loma Run on the Beach, the Khanom Beach Run & Half Marathon, the Pattaya Marathon, and the ECBA Trail.

Is there a marathon in Pattaya in September 2026?

Yes. The Pattaya Marathon 2026 is scheduled for September 26–27 in Pattaya, Chon Buri Province. Distances range from the full 42.195 km marathon to a 4.5 km Fun Run.

Which sporting events take place in Phuket in September 2026?

The Phuket Trail 2026 is scheduled for September 12–13 at MIRA Valley, Thalang District. Distances range from the 75 km Ultra Trail to a 7 km Fun Run.

When is Thai National Flag Day in 2026?

Thai National Flag Day will be observed on September 28, 2026. This day commemorates the adoption of the Thai tricolor flag under King Rama VI in 1917 and is observed nationwide.

What natural phenomenon can be seen at Phanom Rung in September?

The Phanom Rung Light Phenomenon allows visitors to witness the sun’s rays passing through the 15 doorways of Prasat Hin Phanom Rung. According to the calendar, it is scheduled for September 7–10, 2026.

What can travelers do in Thailand in September 2026?

In September, travelers can enjoy cultural festivals, dance and music performances, gastronomy and craft events, as well as participate in or watch marathons, half marathons, and trail runs across different regions of Thailand.

For all other events in Thailand all year round

Explore Thai Culture and Traditions: Events, Festivals, Gastronomy, and Nature

The Thailand culture and traditions section includes general information on a country with multiple cultural traits, such as art, music, dance, literature, religion, festivals, and cuisine, reflecting its long history and diverse ethnic groups.