If you are planning a trip to Koh Samui and wondering about the cannabis scene, you are not alone. Since Thailand reshaped its laws, weed in Koh Samui has become one of the most searched topics for first-time travelers, from backpackers to honeymooners. This Koh Samui weed guide is the practical version we give our own customers at How High: what is legal, where to buy, what it actually costs, where you can consume, and how to keep your first time easy.
Is Weed Legal in Koh Samui?
Short answer: yes, on prescription. Thailand removed cannabis from its narcotics list in June 2022, but since June 2025 cannabis flower has been a controlled herb and the market is medical-only. Every flower purchase needs a PT33 prescription from an authorised practitioner, and you buy in person at a licensed shop. At How High we arrange the consultation with you at the shop, every day from 10am to midnight, so bring your passport. Our guide to getting your PT33 on the island covers where to go and the hours to plan around.
For a first-time visitor, the rules that matter are simple:
- Buy only from licensed dispensaries that handle your PT33
- Keep consumption private, never in public spaces
- Never carry cannabis across a border, in or out of Thailand
Stay inside those lines and there is nothing to stress about.
Where to Buy Weed in Koh Samui
Stick to licensed dispensaries. They display their license, arrange your PT33 consultation, and sell labelled product with a known source rather than a mystery bag from a beach vendor. The island has plenty of good shops, mostly clustered around Chaweng, Lamai, and Fisherman’s Village in Bophut. At How High you can see and smell everything first and lean on English-speaking budtenders, which matters far more than price when you do not know the local genetics yet. Between our two shops you will find Thai flower, imported Cali packs, pre-rolls, and edibles, or you can browse the full menu before you arrive.
How Much Does Weed Cost in Koh Samui?
Prices are easy to sanity-check once you know the tiers. Here is what to expect on Samui in 2026:
- Thai-grown flower: from about 150฿ a gram
- Imported Cali flower: roughly 600 to 800฿ a gram
- Cali packs: from around 2,600฿
- Pre-rolls and edibles: priced per piece, just ask the budtender
Tourist-strip shops sometimes charge a little more, so it pays to compare. If you are staying a while, ask about member pricing and larger quantities, which bring the per-gram cost down.
Where Can You Legally Smoke in Koh Samui?
This is the part first-timers get wrong. Consumption is for private spaces only: your villa or a hotel room that allows it. Beaches, streets, parks, and anywhere near a temple or school are off limits, and public smoking is treated as a public nuisance with fines attached. Curious about the sand specifically? We cover it in detail in can you smoke on the beach in Koh Samui. Many hotels are strictly non-smoking, so check before you light up. If yours is, choose a place to stay where smoking is allowed rather than risking a public spot.
Important Travel Warnings
One rule matters more than all the others: never take cannabis off the island or out of Thailand. Airport and border checks are strict, and what is legal here can land you in serious trouble the moment you leave. Beyond that, treat your first sessions with respect. Start low, especially with edibles and especially in the heat, where a strong dose plus sun plus a few drinks ends more holidays than anything else. Stay hydrated, eat first, skip mixing weed with alcohol, and never drive or ride a scooter under the influence.
Why Koh Samui Is Popular for Cannabis Tourism
Koh Samui pairs clear water, easy island living, and a mature licensed cannabis scene that did not exist a few years ago. You can pick up a couple of grams of genuine California genetics, go through a proper consultation, and enjoy it back at your villa, all without the grey-market guesswork you might be used to at home. Done responsibly, it becomes one of the more relaxing parts of a Samui trip. For more on the unwritten rules, our Thailand weed etiquette guide is worth a read before you go.
Koh Samui Weed Guide FAQ
Do I need a prescription or PT33 to buy weed in Koh Samui? Yes. Since June 2025 flower is a controlled herb, so every purchase needs a PT33 prescription from an authorised practitioner. At How High we arrange the consultation with you at the shop, every day from 10am to midnight. Bring your passport.
How much should a first-timer expect to pay? Thai-grown flower starts around 150฿ a gram, imported Cali runs roughly 600 to 800฿ a gram, and Cali packs start near 2,600฿. Ask about member pricing if you are staying a while.
Where can tourists legally smoke in Koh Samui? Private spaces only: your villa or a hotel room that allows it. Beaches, streets, parks, and anywhere near a temple are off limits and carry fines.
When can I get a PT33 at How High? Every day from 10am to midnight, in both shops. That window is narrower than the shop hours: Chaweng is open around the clock and Fisherman’s Village from 9am to 1am, but the consultation waits for 10am.
Can I bring cannabis home from Thailand? No. Carrying it across any border is a serious offence, whatever the law is at your destination. Enjoy it on the island and leave it there.
Your First Stop on Samui
That is everything a first-time traveler needs: buy licensed, get your PT33 first, keep it private, and respect the island. When you land, come say hello at How High in Chaweng or at Fisherman’s Village in Bophut, and our budtenders will get you sorted properly. For the consumption rules in more depth, read our companion guide on cannabis consumption in Koh Samui.
