Thailand Packing List

Pack the dress code first, because it is enforced at the door.

Thailand's major royal and religious sites publish a dress standard and turn people away at the entrance who do not meet it. The sign at the Grand Palace in Bangkok is explicit: it shows sleeveless shirts, vests, short tops, see-through tops, short trousers, torn trousers, tight trousers, culottes and mini skirts, each crossed out.

What that means in a suitcase is simple. Bring at least one outfit that covers the shoulders and reaches below the knee, in a fabric you can wear in heat, and keep it accessible rather than at the bottom of the bag. A light long-sleeved shirt and loose full-length trousers or a long skirt will clear the standard at most sites and will also be the most comfortable thing you own in strong sun.

This is a condition of entry to specific places rather than a rule about how to dress in Thailand generally. The culture and etiquette guide covers the wider question of conduct, including a legal matter that is not about clothing at all.

One item is not physical.

The UK Foreign, Commonwealth and Development Office states that since 1 May 2025 all foreign nationals entering Thailand, by air, land or sea, must complete a digital arrival card online before arrival, and that it can be registered within 3 days before arriving.

Three days is a short window, and it sits inside the period when most people are packing rather than planning. Put it on this list rather than on the booking list, and do it before you travel rather than in the departure hall. The entry requirements guide sets out what else that source says about arriving.

Documents worth carrying, and one you should not hand over.

Carry evidence of onward or return travel and access to funds: the FCDO records that a traveler may be asked to show at least 10,000 Thai baht per person, or 20,000 per family, and that British nationals have been refused entry for failing to provide it.

Carry a passport that has an expiry date at least 6 months after your arrival date and at least 1 blank page.

And pack the means to leave a cash deposit, because the FCDO is explicit that you should not hand your passport over as a guarantee, for example to motorcycle or jet-ski rental businesses, since companies may hold on to passports against claimed damage. If you plan to rent a scooter or a jet ski, decide before the counter what you will offer instead.

Health items, with the decision left where it belongs.

The FCDO advice is to check vaccination and health information at least 8 weeks before travel. The US Centers for Disease Control and Prevention publishes a Thailand traveler health page covering routine vaccines, hepatitis A, typhoid, rabies and Japanese encephalitis, along with malaria and mosquito-borne illness including dengue, and it states which travelers each recommendation applies to.

Which of those applies to you is a question for a travel health professional, and this guide does not answer it. What it will say is that insect-bite protection is the item most often left behind and the one most consistently discussed across those sources, and that anything prescribed needs to be obtained in that eight-week window rather than in the final week.

For the sea, and for the sun.

The same safety page notes that people have drowned in strong riptides, that Thailand has lifeguards at designated beaches and operates a flag system, and that jellyfish can come close to shore, particularly in the rainy season. None of that is a packing item exactly, except that it argues for swimming where there is a lifeguard and a flag rather than where there is not.

Sun protection and rehydration are the two things every source on tropical travel agrees on and none of ours quantifies, so pack for a climate hotter than you expect and read the flag when you get to the beach.

Sources

• UK Foreign, Commonwealth and Development Office: the Thailand entry requirements page, which describes the rules Thailand applies and writes them for people traveling on a full British citizen passport, so the framing is the British position rather than a general one: that a passport must have an expiry date at least 6 months after the date of arrival and at least 1 blank page; that from 1 May 2025 all foreign nationals entering Thailand, whether by air, land or sea, must complete a digital arrival card online before arrival, and that it can be registered within 3 days before arrival; that from 15 September 2026 entry under the visa exemption scheme allows a stay of up to 30 days for tourism only, and that visa-exempt entry does not cover business travel including conferences and meetings; that a traveler may be asked to show funds of at least 10,000 Thai baht per person or 20,000 per family together with evidence of onward or return travel, and that British nationals have been refused entry for failing to provide it; and that overstaying carries a fine of 500 Thai baht a day up to a maximum of 20,000 baht, with detention, deportation at the traveler own expense and a ban from re-entering Thailand for up to 10 years, adding that conditions in detention centers can be harsh. Accessed 22 September 2026.
• UK Foreign, Commonwealth and Development Office: the Thailand safety and security page: that criticizing the Thai monarchy is illegal, that the law can be interpreted broadly and carries a long prison sentence, and that journalists, human rights defenders and members of the public have faced charges over political comments and shared articles; that travelers should not hand a passport over as a guarantee, for example to motorcycle or jet-ski rental businesses, because companies may hold on to passports against claimed damage; that people have arrived in Thailand and been illegally transported to neighboring countries on the promise of high-paying jobs that turn out to be scams, and may then be detained on re-entry while their immigration status is validated; that drink spiking and drug-assisted sexual assault happen in tourist areas with both male and female victims, that attacks are most common during full moon parties or similar events and near bars late at night, and that drinks served in bars are often stronger than those at home; that there have been incidents of ATM skimming and that a traveler should use an ATM in a bank and protect the PIN; and that people have drowned in strong riptides, that Thailand has lifeguards at designated beaches and operates a flag system for safe swimming, and that warning signs and especially red flags should be followed. Accessed 22 September 2026.
• US Centers for Disease Control and Prevention: the Thailand traveler health page: that routine vaccines should be up to date before travel, and that it sets out vaccine and medicine advice for this destination covering hepatitis A, typhoid, rabies and Japanese encephalitis, along with malaria and mosquito-borne illness including dengue. The page states which travelers each recommendation applies to, and the decision belongs with a travel health professional rather than with a guide. Accessed 22 September 2026.