How Much Weed Can You Carry in Thailand? 2026 Possession Rules Explained
November 12, 2026
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Quick answer: In 2026, there’s no “personal allowance” for weed in Thailand. You may only carry cannabis flower that was dispensed to you on a valid Thai prescription, and only up to the amount on that prescription, which can’t exceed a 30-day supply. Reports on the rules put the cap at about 30 grams per prescription.
Keep your prescription, receipt and passport with the product. Without a prescription, possession of any amount can be treated as illegal. Rules can change, so check official sources.
Last updated: 11 November 2026
How much weed can you carry in Thailand? It’s one of the most common questions visitors ask, partly because the rules changed a lot after 2022. Many older blog posts still describe a time when shops sold freely and nobody asked about quantities. That’s no longer the case. This guide explains how possession works today and how to stay on the right side of the law as an adult visitor.
Not in the way many tourists expect. Thailand doesn’t set a simple recreational limit, such as “you can carry 10 grams”. Since June 2025, cannabis flower has been a controlled herb, and buying, carrying or using it is only allowed with a prescription issued in Thailand by an authorised practitioner.
That means the real limit is the amount written on your prescription. The Tourism Authority of Thailand says dispensing must be limited to what is medically necessary and must not exceed a 30-day supply. Thai media reports on the Department of Thai Traditional and Alternative Medicine’s rules describe that as up to about 30 grams per prescription.
For the bigger picture, read our complete guide to Thailand’s cannabis laws for tourists.
A Thai practitioner decides whether to prescribe and how much. Your prescription shows the quantity and the time period it covers, and a licensed shop can only dispense within it.
| Situation | Can you carry it? | What to keep with you |
|---|---|---|
| Flower bought with a valid Thai prescription, within the stated amount | Yes, within Thailand | Prescription, shop receipt and passport |
| More than the amount on your prescription | No | — |
| Flower bought without a prescription | No, possession can be treated as illegal | — |
| A foreign medical card or prescription | Not valid in Thailand | — |
| Extracts, oils or edibles above 0.2% THC | No, these can fall under narcotics law | — |
| Cannabis leaving or entering Thailand | No, never | — |
Prescriptions don’t make every situation legal. They don’t allow public smoking, sharing or selling to others, or taking cannabis across a border.
Yes. Under the current rules, tourists are not allowed to use, buy, carry or transport cannabis flower without a valid Thai prescription. Foreign medical cards aren’t recognised.
Licensed shops must check ID and follow the prescription process. If you want to understand how that works, our guide on how to get a medical cannabis prescription in Chiang Mai explains the steps. We can’t give medical advice, and a practitioner may decline to prescribe.
If you have cannabis that was legally dispensed to you, keep the paperwork together with it. That way you can answer questions quickly if you’re asked.
Your checklist:
Keep it in your accommodation where private use is allowed, rather than carrying it around town all day.
Police in Chiang Mai do run roadside checkpoints, especially at night. Stay calm, be polite and show your documents if asked. Carrying more than your prescription allows, or carrying cannabis without one, can lead to confiscation, fines or charges.
Never ride a scooter or drive after using cannabis. Our article on police checkpoints and cannabis in Thailand explains what to expect and how to respond.
Taking cannabis out of Thailand, or bringing it in, is never allowed, whatever paperwork you hold. Customs penalties can be serious, and other countries’ laws can be much stricter. Read our guide to taking cannabis home from Thailand before you pack.
Domestic travel has its own rules and risks. Our explainer Can I Fly with Weed in Thailand? covers domestic flights in detail. The simplest option is not to travel with cannabis at all.
Only the amount on your Thai prescription. Prescriptions can’t exceed a 30-day supply, which reports describe as about 30 grams. Without a prescription, there’s no legal amount.
Only with a valid prescription issued in Thailand. Tourists are not allowed to buy, carry or use cannabis flower without one, and foreign medical cards are not accepted.
Yes. Official guidance says unauthorised possession of cannabis flower remains illegal. Outcomes can include confiscation, fines or charges.
CBD products that are registered and labelled for sale in Thailand, with THC within the legal limit, are treated differently from flower. Extracts above 0.2% THC can fall under narcotics law, so check the label and keep the receipt.
Adults 20+ should only use licensed shops that check ID and follow the prescription rules. Our guide to the top 5 cannabis dispensaries in Chiang Mai explains what to look for.
Have questions about the current rules? Our team is happy to explain them in person. Haze Buds is for adults 20+ with valid ID, and all products are sold in store only, with no delivery or online orders. Find directions on our contact page.
Disclaimer: This article is general information, not legal or medical advice. Thai cannabis rules can change, so check official government sources before you buy, carry or travel.
