Napalai Tansai (born 20 May 1982 in Chonburi) is a Thai windsurfer. She has competed at three Olympics, at the 2000, 2008 and 2012 Summer Olympics.[1] In 2000, sailing in the Mistral One class, she finished in 19th place.[2] The Mistral class was replaced with the RS:X class in which she finished in 20th place in 2008 and 24th place in 2012.[2][3]