Do I need a visa to visit Phuket?
Many nationalities may enter Thailand for 30 days without obtaining a visa prior to their arrival. Check the Immigration page and it’s link to Thailand Immigration to be sure. Sixty-day tourist visas are obtainable for many nationalities before leaving their countries and can be usually be renewed for up to 30 more days (at the discretion of the immigration officials of course). So, an extended stay is easy to do if you want to thoroughly check the island out.
