Travelling from IndiaThe climate will feel familiar — similar to coastal India. Cotton kurtas, palazzos and salwar suits are ideal for temples and city days. For beach days, many Indian travellers prefer full-coverage swimwear or a sarong cover-up. Thailand uses Type A/B/C/O sockets; Indian Type C plugs usually fit.
Travelling from the USBring a universal adapter (Type A/C/O, 220V — US two-flat-pin plugs often fit). Pack one pair of loose trousers and a covering top specifically for the Grand Palace; elephant pants sold on the street also work.
Travelling from the UKYou'll need an adapter (Type A/C/O, 220V). Expect far more heat and humidity than a Mediterranean summer — breathable cotton and linen, not polyester.