My starting point for Thailand would be a small, washable wardrobe, a complete outfit for temples, comfortable walking shoes, sun and mosquito protection, and the personal items that are awkward to replace: medicines, glasses and travel documents. Add rain protection, swimwear or warmer layers for the places you are visiting.
For a two-week trip, plan the wardrobe around how many days you need to cover before clean laundry comes back. That leaves room for the things your particular trip needs, whether that is a camera, a familiar sunscreen or a warmer top for the mountains.
Choose your bag and laundry plan first
Suitcase or backpack?
For hotel stays and road transfers, I would choose a wheeled suitcase if it is easier for you to handle. A backpack becomes more useful when you expect to carry your bag up stairs, through several transfers or between different forms of transport. It still needs to be comfortable when fully packed.
Choose a bag you can lift and carry comfortably on the transfers you have planned.
Before settling on a bag, check the size, weight and number of cabin items allowed on every flight in the trip. Compare the packed bag with those limits, even if its manufacturer describes it as “carry-on size”. Check its dimensions as well as its capacity in litres.
How much clothing do you need?
Pack enough underwear, socks and changes of clothing to reach your next laundry return, then leave yourself a clean spare where you need one. Clothes being washed are temporarily out of your wardrobe.
For example, if you plan to hand over laundry after four days and collect it the following day, you need something clean to wear while it is away.
For one week, you might prefer to bring enough clothing for the whole stay. For two weeks, three weeks or a month, I would build washing into the plan. Confirm the return time before handing anything over, especially before a transfer to another town or island. Check drying instructions for items that need special treatment, and keep a separate bag for worn or wet clothes.
Clothes and shoes that earn their place
A simple everyday wardrobe
Start with the clothes you already find comfortable in warm weather:
- Lightweight tops, including some with sleeves.
- Loose trousers, shorts or skirts that work with those tops.
- Underwear, socks and comfortable sleepwear.
- A full-length, opaque outfit suitable for temple visits.
- Swimwear if you will use a beach or pool.
- A light layer for a cool indoor space or an evening when you want one.
- Anything required for a specific planned activity or a venue with a dress code.
I favour clothes that can share jobs. Loose trousers can work for a temple visit and an evening out; a light shirt can cover your arms without requiring a separate outfit. Choose the cut and fabric you find comfortable, then think about how you will wash and dry it. For cotton, linen or technical fabrics, consider the individual garment’s fit and drying needs.
Bring heavy jeans if they have a use on your trip that your lighter trousers cannot cover.
A complete temple outfit
Pack clothes that cover your shoulders and knees, with real sleeves and opaque fabric. My choice would be a loose shirt or T-shirt with full-length trousers, or a long skirt that gives comparable coverage. Having the whole outfit ready is more useful than hoping to improvise at the entrance.
At the Grand Palace and Wat Phra Kaew in Bangkok, a scarf draped over a sleeveless top is not accepted as a substitute for sleeves. Shorts, three-quarter-length trousers, leggings, tight or ripped trousers and see-through clothing are also unsuitable.
A scarf or sarong can still be useful elsewhere in your luggage. For a strict religious site, have a complete outfit ready and check that place’s clothing requirements.
Walking shoes, sandals and activity footwear
The first pair to choose is something you already find comfortable for sustained walking. That could be walking shoes or supportive sandals, depending on your feet and your plans. Try them with the socks you intend to wear before departure.
Flip-flops or simple sandals have a clear role around a beach, pool or accommodation. For wet, uneven paths, choose secure fastening and suitable grip. Footwear for a proper hike should match the trail and the activity provider’s requirements.
Let your planned activities decide any extra footwear. Add smarter shoes only if a restaurant or evening venue calls for them, and check its rules. Pack heavy hiking boots when the trail requires them.
Add the right layers for your route
Rain and the two southern coasts
Rain patterns vary across Thailand. Across much of the upper country, the main southwest-monsoon period runs roughly from mid-May to mid-October. On the southern Gulf coast, rain associated with the northeast monsoon continues later, into December. Choose travel dates and rain gear for the coast you will visit; the Gulf and Andaman coasts have different seasonal patterns.
Use those seasonal patterns to guide your packing, then check the forecast for your destinations and travel dates before leaving.
For walking around town, a small umbrella is a practical option. For activities where you want your hands free, I would choose a light rain jacket or suitable poncho. Choose something light enough to keep in your day bag.
Protect the contents of your bag separately. Put documents and electronics inside a suitable waterproof inner bag or pouch, even when using an outer backpack cover. Check what a phone pouch or dry bag is designed to withstand. Protection from rain or splashes is not the same promise as protection during a swim or dive.
Northern towns and mountain trips
For northern Thailand, plan separately for time in Chiang Mai city and any early mountain outings. The cooler part of the year in northern Thailand calls for a different clothing check from a beach stay, and a high-elevation outing needs the forecast for that location.
Add a warmer layer for a mountain sunrise, an overnight stay at elevation or another outing where the forecast calls for it. A fleece or warm top, long trousers and suitable socks are sensible items to consider. Decide whether you need further insulation from the conditions of the trip; one thin cardigan is not a universal mountain solution.
Beaches, boats and outdoor activities
For beach time, add swimwear and something to put on when leaving the beach. A rash vest or other sun-protective clothing is worth considering when you expect to spend a long time in the water or on a boat.
Take a quick-drying towel if your accommodation or activity does not provide one, or if you specifically want your own. Check the amenities when booking.
For boat trips, choose how to protect your phone, camera and documents before boarding. A suitable dry bag can be useful, but follow its intended use and closure instructions. Add a small torch or headlamp for a planned walk or activity in the dark.
Toiletries, sun protection and insect repellent
Personal items to bring from home
Bring the personal products you need at the start of the trip, especially when a particular formula or fit matters:
- Toothbrush, toothpaste and your usual dental-care items.
- Deodorant and the hair or skin products you use.
- Menstrual products or other personal-care supplies that suit your needs.
- Contact lenses, the correct solution and any spare lenses you require.
- Glasses, particularly if you would otherwise depend entirely on contact lenses.
- Your preferred sunscreen and insect repellent.
Check which toiletries your accommodation supplies before packing large bottles. If you are comfortable changing brands, you can plan to replace ordinary consumables during the trip. Keep enough with you to avoid having to find a particular shop immediately after arrival.
High-SPF sunscreen is sold in Thailand, including SPF 50 and 50+ products. I recommend bringing a familiar product when skin tolerance, ingredients or texture matter, so you have it even if nearby shops do not stock it. For supplies you plan to replace, compare the products and prices you find locally.
Sunscreen and national-park ingredients
Choose a broad-spectrum sunscreen with SPF 30 or higher, alongside a hat, sunglasses with UVA/UVB protection and clothing that covers exposed skin. Reapply sunscreen every two hours and after swimming or heavy sweating, following the product’s instructions. Reapply water-resistant sunscreen too.
If your trip includes a Thai national park, check the ingredient list before packing sunscreen. Products containing oxybenzone, octinoxate, 4-methylbenzylidene camphor (4-MBC) or butylparaben are prohibited there. On some labels, oxybenzone appears as benzophenone-3 and octinoxate as ethylhexyl methoxycinnamate.
This is a rule for national parks, not a ban on every chemical sunscreen or every beach in Thailand. Check the ingredient list even when the bottle is labelled “reef-safe”.
Mosquito protection
Pack a repellent with an effective active ingredient such as DEET or picaridin, and follow its label for application and reapplication. Mosquitoes can bite during the day as well as at night; plan protection around your time outdoors.
Loose long sleeves and trousers can add coverage. When using both products, apply sunscreen first and insect repellent afterwards. Choose products you can use correctly and carry when needed.
Sort out personal medicines before departure
I would organise personal medicines early. Check the rules for the exact active ingredient and quantity, including whether you need permission to bring it into Thailand.
Check the Thai FDA’s general guidance on bringing medicines for the ordinary personal-use allowance of up to a 30-day supply. Controlled medicines have separate rules: use the Thai FDA’s guidance on controlled medicines to check the permitted quantity and any advance permit. Resolve questions about a longer supply before travelling. A prescription alone does not authorise every substance or quantity.
Keep medicines in their original, labelled packaging, with a copy of the prescription or a doctor’s letter identifying the medicine, preferably by its generic name. Carry the permitted supply in your hand luggage so you can reach it during the journey. For liquid medicines, check the security-screening exception before departure; it is separate from permission to import the medicine.
A small first-aid pouch can hold plasters, blister dressings and other basic supplies you already know you need. Choose familiar, permitted medicines that meet your own needs.
Documents, cash and a physical card
Keep the following available for the journey:
- Your passport and the visa or other entry documents required for your own circumstances.
- Flight details, accommodation confirmations and the address of your first stay.
- Travel-insurance details and the contact number you would use if you needed assistance.
- Your TDAC confirmation, where required.
- Prescriptions, medical letters or medicine permits relevant to what you are carrying.
- A physical payment card, its PIN and some cash.
The Thailand Digital Arrival Card is separate from a visa. Have your passport, travel and accommodation details ready when completing it, and save the confirmation where you can access it during the journey.
Save useful documents offline, with a separate backup of essential details. A copy is useful if you lose access to the original. Travel with the required originals as well as the backups.
I would keep cash available for small purchases and a physical card even if accommodation is prepaid and you normally pay by phone. Do not assume that a virtual card will cover every ATM you encounter.
Wise and Revolut can have their own withdrawal allowances or charges, and an ATM operator can levy a separate fee. Read the charge shown before accepting a withdrawal. If the ATM offers currency conversion, choose the transaction in Thai baht rather than accepting its conversion into your home currency.
A money belt or document organiser is optional. Choose one if it makes your belongings easier to manage, and keep a backup payment method separately. No particular pouch guarantees the safety of its contents.
Chargers, adapters and power banks
Choose a compatible charger and adapter
Pack the phone, cables and charger you will use, plus an adapter that suits your equipment. Thailand has several socket types, including A, B, C and O, and the supply frequency is 50 Hz.
Look at the input label on each charger. A device marked “100–240 V, 50/60 Hz” is designed for a range that covers the local supply. A plug adapter only changes how the plug fits; it does not convert voltage or frequency. A hairdryer or other appliance marked only for 110/120 V cannot be made compatible merely by adding an adapter.
I would leave a voltage-incompatible appliance at home and check the accommodation’s equipment. For your usual electronics, take a charger with the ports and power output those devices need, and test the combination before departure.
Check your intended phone plan, SIM or eSIM against your phone’s compatibility before relying on it. Save the first accommodation address and any essential arrival instructions offline so they are available before the connection is working.
Pack your power bank for the flight
Under Thai aviation rules, you can carry up to two power banks per passenger, in the cabin only. They are prohibited in checked luggage. Keep them accessible, protect them against short circuits and do not put them in an overhead compartment. You must not charge a power bank or use it to charge another device during the flight.
Choose one with clear capacity markings in watt-hours, or Wh. For a capacity given in mAh, you also need the nominal voltage: 20,000 mAh at 3.7 V works out at 74 Wh. The calculation is mAh multiplied by nominal voltage, divided by 1,000.
Under the Thai regulatory framework, power banks above 100 Wh and up to 160 Wh require airline approval. Those above 160 Wh are not permitted. Airlines can set stricter limits. Thai Airways’ power-bank rules allow no more than two, each at or below 100 Wh, and prohibit power banks above 100 Wh.
I would choose a clearly labelled unit at or below 100 Wh and check every airline involved before flying. Do not rely on an approval possibility for a different carrier. The batteries built into your phone or laptop do not count towards the two-power-bank limit.
What I would leave at home
After laying everything out, set aside items with no clear use on the trip:
- Duplicate outfits and shoes. Keep the choices that cover your planned activities and laundry interval.
- Large toiletries without a personal reason. Bring a manageable amount, then replace ordinary supplies when needed.
- A hairdryer or bulky towel without checking the accommodation. Pack your own when the booking or activity calls for it.
- A laptop without a task that requires it. Bring it for work or another planned use.
- Extra cameras, lenses or reading devices you do not expect to use. Keep a camera or e-reader if you enjoy using it.
- Vapes and e-cigarettes. Their import into Thailand is prohibited. An airline’s instructions about carrying an electronic cigarette in the cabin do not give permission to bring it into the country.
I would keep something personal that makes the trip better, provided you will use it and can carry it comfortably.
Keep a small day bag ready
A small backpack or shoulder bag should hold what you will need between leaving the accommodation and coming back. My starting list would be:
- A reusable bottle filled from a drinking-water source.
- Sunscreen, a hat and sunglasses.
- Insect repellent when you need it during the day.
- Tissues and a small hand sanitiser.
- Cash, a payment card and the documents needed for that day’s activity.
- Your phone and any charging equipment needed between stops.
- Personal medicines needed during the outing.
- A rain layer or umbrella, with protected storage for electronics and documents.
Add temple clothing, swimwear or another activity-specific item when it belongs to that day’s plan. Leave the rest in your main luggage.
Divide your hand luggage before the flight
Liquids and medicine exceptions
For cabin liquids, gels and aerosols, use containers with a marked capacity of no more than 100 ml, placed together in one clear, resealable bag of no more than one litre per passenger. A large bottle with only a little liquid left inside does not meet the container-size limit. An empty reusable water bottle can be larger than 100 ml.
Necessary liquid medicines and certain infant or medical foods have separate exceptions. Check the allowed amount and documentation before leaving, and present them for screening as required. You can check the Suvarnabhumi cabin-liquid guidance, as well as the rules at your departure and transit airports.
Pack larger ordinary toiletries in checked luggage if they are permitted there, or leave them for a later purchase. Keep the liquids you will present at security easy to reach.
What stays with you
My hand-luggage priorities are documents, cards, permitted medicines, glasses, the phone and its charger, valuable electronics and enough spare clothing to manage a delay in the arrival of the larger bag.
Keep power banks in the cabin. If a cabin bag has to go into the hold at the gate, remove them before handing it over, along with the documents and personal items you need to retain.
Before leaving, weigh and measure the packed bag against the allowance on each booking. Include the day bag and any other separate cabin item in the check.