People from all six Andaman provinces are expected, along with visitors from India, Iraq, Iran, Pakistan, Malaysia and the Middle East, members of the Phuket Islamic Committee told the governor in a meeting at Provincial Hall.
Participants will visit Phuket from February 12-16, staying in tents at the Chanasuk Memorial Field in central Phuket at Thalang.
The Phuket Provincial Administrative Organisation has welcomed the gathering, which is a first for Phuket after similar seminars in Bangkok, Pattaya and other centres over the years.
The Phuket organisation and local councils are expected to provide temporary kitchens and bathing facilities for the gathering.
Phuket has more than 50 mosques and its population of permanent residents is about one-third Muslim.