Do Australians need to apply for a visa before travelling to Thailand for longer than 30 days?

You can get from October 45 day's or Thailand give easily 60 days at the embassy

I done it few times you just apply a come day after a collect it

@Ro***

Assuming you are going for more than 45 days, do yourself a favour and get a 60 day TV. It will negate any potential problems with the airline on way out. Also, it’s just wasted time and hassle at immigration office when extending your stay. The cost of the TV and extension are comparable, so no real advantage in not getting a TV.

What you get is all determined by whether you want to waste time at an immigration office, that can be difficult to find, and knowing what documents you need to get a 30 day extension when you are here, or just getting a 60 day tourist visa, and not having to worry about getting an extension. Vacation time can be prescuous so personally I would get a tourist visa before you travel so your vacation is all about the vacation, and not dealing with getting an extension.

What

@Brandon ***********

said. If you're arriving after October 1st and staying less than 45 days you don't need to do anything

As Australian you don't need a visa. You just turn up and are stamped in for 30 days (if you come after October 1st, you get 45 days). This stay can be extended a further 30 days by paying 1900 baht at an immigration office, so you get 75 days total

There is no such thing as a 30 day tourist visa.

Australians qualify for visa exempt, which means you have NO VISA at all.

With visa exempt you get stamped into Thailand for 30 days (45 days starting October 1st) and while in Thailand you can get a one-time extension for 30 days from your local immigration office.

The only issue you may run into with this is that your airline might not let you board a flight unless you can show proof of leaving Thailand within the initial stamp (30 or 45 days), so you might want to purchase a cheap bus or train ticket out of Thailand to show at checkin, or google "onward travel ticket" for other options.