The Koh Samui
cannabis guide.
Clear, up-to-date answers about cannabis in Thailand: the 2026 rules, the plant, and life on the island. Written by the Weed Samui team on Koh Samui.
-
Is Weed Legal in Thailand? What Visitors Need to Know in 2026
Is weed legal in Thailand in 2026? Since mid-2025, cannabis flowers need a medical prescription. Here are the rules every visitor to Koh Samui should know.
-
What Is a PT33 Prescription? How Medical Cannabis Works in Thailand
What is a PT33 prescription, who can issue one, which conditions qualify and how long does it last? A clear 2026 guide to medical cannabis in Thailand.
-
Visiting a Koh Samui Dispensary in 2026: What to Expect
Planning to visit a Koh Samui dispensary? How licensed shops work in 2026, what to bring, how the consultation goes and the island rules to respect.
-
Indica vs Sativa vs Hybrid: What Cannabis Labels Really Mean
Indica vs sativa: what do the labels really tell you? The botany, the science and how to choose by aroma and cannabinoids rather than by a name alone.
-
Cannabis Terpenes Explained: Why Weed Smells Like Lemon, Pine or Diesel
Cannabis terpenes give each strain its aroma, from lemon and pine to diesel. The 8 main terpenes, where else they occur and how to recognise them.
-
THC vs CBD: What’s the Difference and Why It Matters
THC vs CBD: how the two best-known cannabinoids differ in effects, labels, safety and legal status in Thailand, explained clearly for beginners in 2026.
-
How to Judge Cannabis Quality: From Everyday to Top-Shelf
How to judge cannabis quality like a pro: trichomes, trim, aroma, cure and moisture, plus red flags such as mould or seeds, from everyday to top-shelf.
-
How to Store Cannabis in a Tropical Climate Like Koh Samui
How to store cannabis in a hot, humid climate like Koh Samui: ideal humidity, the right jars, how to keep mould away and what to do in your hotel room.
-
From Thai Sticks to Prescriptions: A Short History of Cannabis in Thailand
The history of cannabis in Thailand: traditional medicine, the Thai stick era, the 2022 decriminalisation and today’s medical-only rules, in six chapters.
-
10 Cannabis Myths Visitors to Thailand Still Believe
Ten cannabis myths about Thailand, debunked: from weed being legal for everyone to indica always sedating and taking a little home. Get the facts first.
Questions about
cannabis in Thailand?
Our team on Koh Samui is happy to explain how the rules work in practice and to answer your questions, in store or by message.