What visa options are available for staying in Thailand for 6 months while volunteering and traveling?

Try a multiple entry tourist visa.

Exemption, extend, quick trip to another country

Repeat 2 more time. 180 days in the books.

Volunteer Visas are very hard to get nowadays TV and extend then leave and get a new TV and extend shouldn’t be a problem but more than that back to back you could be denied

so many volunteers for touring !!555/5/5/55/////555555

I'm doing 6 months i came on a 45 days then 30 days at Jomtien Immigration then 2 same day Cambodia border runs which each gave 45 days then 30 days at Jomtien Immigration

To be a volunteer in Thailand, you need the appropriate visa. But due to abuse, by mainly Chinese nationals, Thai authorities have stopped issuing the visa. Who knows when they will start again but unlikely soon with so many Chinese tourists now entering Thailand.

You won't be able to do it without leaving the country at least once.

If you want to volunteer you need to be in contact with the organization you'll be volunteering for and apply for a non-O visa before you leave Australia with the paperwork the organization provides you.

This visa should be 90 days and then when it's coming to an end, cancel your work permit and leave Thailand.

You can then either travel to a nearby consulate and apply for a tourist visa which can get you 90 days in the country and is your best option, or just do a simple border bounce and get a 30 day visa exempt plus 30 day extension. Then you'll have to do this again after those 60 days, but at that point you'll have been in Thailand for 5 months already and may encounter issues trying to enter the country again as a tourist. Which is why getting the tourist visa is the better option since you can get 90 days and not have to worry about leaving and re-entering.

3 months travel is easy, get a tr60 visa then pay 1900baht at immigration office thailand and get an extension of 30 days that gives you 90 days total. Volunteer visa i am not sure about