The queen of Thailand on Thursday won a gold medal in sailing at the Southeast Asian Games, a regional competition being held in her country this month.

Queen Suthida, the wife of King Maha Vajiralongkorn, competed in the mixed keelboat SSL47 category, on a 14-metre sailboat with nine other crew members.

The queen, 47, served as tactician and helmswoman to lead the Thai team to victory in the waters off Pattaya, ahead of Malaysia and Myanmar.

Her team, dressed in matching black sailing attire, celebrated earlier aboard their boat with cheers, while one sailor waved the Thai national flag.

A keen athlete, she ran a half marathon in 2:13:40 this month in the capital Bangkok alongside Kenyan running legend Eliud Kipchoge.

The queen led the Thai delegation at the opening ceremony of the SEA Games on 9 December in Bangkok.

The Games end on Saturday, with host Thailand well ahead in the medal count, followed by Indonesia and Vietnam. (AFP)