Do I need a visa for a 6-week visit to Thailand, and what type should I get?

For a 6-week visit to Thailand, you have a couple of options regarding your visa. You can either apply for a single entry tourist visa at the Thai consulate in your country, which would give you 60 days upon entry, or you can enter Thailand under the visa-exempt entry that allows for 30 days. If you choose the second option, you can extend your stay by 30 days for a fee of 1900 baht at the immigration office. It may be worth considering which option best suits your travel plans.