Chanthaburi

Chanthaburi is a provincial city in eastern Thailand, about 245 km from Bangkok by road, known for its weekend gem market, the old riverside quarter of Chanthaboon and one of the largest Catholic churches in Thailand. It is also the heart of Thailand's durian and mangosteen country, and it makes a natural stop on the way to Koh Chang.

Few foreign visitors stay the night, which is a pity: the city has a character of its own, shaped by Chinese and Vietnamese settlers, a period of French occupation and a gem trade that draws buyers from across Asia. One full day covers the market, the waterfront and the cathedral; add a second for the waterfalls of Namtok Phlio or the coast. This guide explains what to see, when the fruit is in season and how to get there.

The weekend gem market on Si Chan Road

Gems are Chanthaburi's other trademark besides fruit, and on weekends the streets around Si Chan Road and the narrow Trok Kachang lane, near the junction with Thetsaban Road, become a trading floor where dealers buy and sell loose stones. Most of the business is between traders, so visitors mainly watch.

No official page gives the hours. Sources agree on the weekend, mainly from mid-morning to mid-afternoon, with Saturday the busiest day; some say Friday too. Go before lunch on Saturday for the full scene. The town also hosts a yearly gem and jewelry fair: TAT listed the International Chanthaburi Gems and Jewelry Festival for 5 to 10 December 2025 at the Gem and Jewelry Center and the gem market.

Watching is free and fascinating. Buying is a different matter: this is a market for professionals, and prices and quality are hard to judge without training. Our guide to common scams in Thailand explains the gem scams and the official "Buy with Confidence" scheme; read it before you spend money on a stone.

Chanthaboon: the riverside quarter

The old district along the Chanthaburi River is called Chanthaboon. After the Paknam crisis of 1893, French troops occupied Chanthaburi for about 14 years, according to TAT, and the houses built in that period have European-style windows, arcades and wooden balconies similar to those in French Indochina. TAT says at least a dozen of these historic houses survived, and many are now coffee shops, galleries, restaurants and small hotels.

Walk the waterfront lane in the late afternoon, when the heat drops and the cafés open their shutters. Baan Phokabarn, an old house in the quarter, has an information center and a small museum with photographs of the town in the past. The quarter rewards a slow walk more than a checklist.

The Cathedral of the Immaculate Conception

Across the river from the Chanthaboon community stands the Cathedral of the Immaculate Conception, which TAT describes as one of the largest Catholic churches in Thailand. Construction started during the French occupation, and the church was finished two years after France withdrew. Its outside is a plain grey-brown, but the interior is gothic, with a vaulted ceiling, trompe-l'œil wall paintings and stained glass made in France.

The cathedral is the center of the city's Catholic community, many of them descendants of Vietnamese Catholics who settled here. It is a working church, so dress modestly, keep quiet during services and ask before you photograph people. We could not find official visiting hours, so check locally.

Chanthaburi's Chinese heritage is visible too. Wat Mangkon Buppharam, also called Wat Leng Hua Yi, is a Sino-Buddhist temple built in 1977 where Mahayana Buddhism is practised, as TAT explains, decorated with bright mosaic tile patterns. Our guide to temple etiquette applies here as at any Thai temple.

Durian and mangosteen season

TAT calls Chanthaburi famous for its durians and its gemstones. Orchards cover much of the province, and in season fruit is sold all over town. The east usually harvests earlier than the south, so the season here tends to start in spring and run into the middle of the year.

We could not find an official harvest calendar or confirmed 2027 fruit-festival dates for Chanthaburi, and harvests shift with the weather each year. If fruit is the main reason for your trip, ask TAT's local office or a hotel in the province a few weeks before you travel. Our Thai fruit guide explains how to choose and eat durian, and the house rules that keep it out of most hotels and buses.

Namtok Phlio National Park and the coast

The most popular nature trip is Namtok Phlio National Park, about 14 km from town according to TAT. Its main waterfall falls in tiers into a clear pool full of large fish that swim around bathers. Entry is 200 baht for foreign adults and 100 baht for children (Category 2).

Heavy rain caused flash floods around the park on Thursday 10 September 2026; the Department of National Parks (DNP) reported the situation resolved the same day, and we found no closure notice for the park itself. Waterfalls rise quickly after storms, so stay out of the water when it is brown or fast. On the coast, TAT names Laem Sing, Chao Lao, Kung Wiman and Kung Kraben as the province's best beaches; they are quiet on weekdays and a little busier at weekends.

The Cambodian border: what is closed

Chanthaburi is one of the provinces on the Cambodian border, but the city itself lies well away from it. Since Monday 23 June 2025 all land crossings to Cambodia have been suspended. TAT's border advisory of December 2025 lists the Ban Laem and Ban Phak Kad checkpoints and the border zones near Pong Nam Ron and Soi Dao districts as closed. The UK FCDO advises against all but essential travel within 20 km of the border (as of October 2026).

For a visitor this means two things: do not plan to continue overland to Cambodia from here, and do not drive into the border districts. Our page on crossing from Thailand to Cambodia in 2026 covers the alternatives. Drones are also banned in named districts of the border provinces; read our guide to flying a drone in Thailand before you pack one.

Getting to Chanthaburi, and going on to Koh Chang

Buses to Chanthaburi leave from Bangkok's Eastern Bus Terminal at Ekkamai, and Airports of Thailand has listed a Transport Co. route from Suvarnabhumi's Public Transportation Center (route 9907) on a page dated 2022. We could not confirm current times or fares because the bus company's website was unreachable, so check at the terminal. Our guide to long-distance buses explains the classes. By car, the route runs east along the coast highway through Rayong; many drivers heading to Trat break the journey here.

Chanthaburi is on the way to the eastern islands. Our guide to getting from Bangkok to Koh Chang covers the onward buses, the drive and the ferry, and our Koh Chang guide covers the island. For quieter islands further along the coast, see Koh Samet, Koh Kood and Koh Mak; if you come from the other direction, Pattaya is on the same coast closer to Bangkok.

When to go

Chanthaburi is one of the wettest places in Thailand. The Thai Meteorological Department records almost 3,000 mm a year at the city's station, with the heaviest rain from May to September. December to February is dry and the most comfortable for walking the old quarter. The fruit season falls partly in the wet months, so you may have to trade sunshine for durian; our page on travelling in the rainy season explains what that is like.

Frequently asked questions

When is the Chanthaburi gem market open?

At weekends, mainly from mid-morning to mid-afternoon, with Saturday the busiest day; some sources say it also opens on Fridays. There is no official timetable, so arrive before lunch on Saturday to see it at its liveliest.

Is it safe to buy gems in Chanthaburi?

Watching the trade is safe and interesting, but buying stones as an outsider is risky because quality and price are hard to judge. Buy only what you would be happy to pay for as a souvenir, and ask for a laboratory report for anything valuable.

When is durian season in Chanthaburi?

Roughly from spring into the middle of the year, earlier than in southern Thailand, but the exact months change with the weather. No official calendar is published, so ask locally a few weeks before you travel if durian is the reason for your trip.

Can I cross into Cambodia from Chanthaburi?

No. All land crossings between Thailand and Cambodia have been suspended since 23 June 2025, including the Ban Laem and Ban Phak Kad checkpoints in Chanthaburi, and the UK advises against all but essential travel within 20 km of the border.

Sources

• TAT Newsroom – European architectural influence and French flair on the Gulf of Thailand (Chanthaboon, 2018) (checked October 2026)
• TAT Newsroom – The hidden gems of Chanthaburi (2015) (checked October 2026)
• TAT Newsroom – December 2025 festivals, including the Chanthaburi Gems and Jewelry Festival (checked October 2026)
• TAT Newsroom – Travel advisory: border safety measures in eastern and north-eastern Thailand (December 2025) (checked October 2026)
• TAT Newsroom – East Thailand: Chanthaburi, durians and gemstones (December 2024) (checked October 2026)
• Department of National Parks – Flash flood near Namtok Phlio National Park (10 September 2026) (checked October 2026)
• UK FCDO – Thailand travel advice (updated 12 October 2026) (checked October 2026)
• Thai Meteorological Department – Climate normals 1991–2020 (checked October 2026)