[θàɰ̃dwɛ́ mjo̰]; formerly Sandoway), historically called Dwaraddy, is a town and major seaport in Rakhine State, the westernmost part of Myanmar.

Thandwe is very ancient, and is said to have been at one time the capital of Rakhine State, then called Arakan.

The streams are only mountain torrents to within a few miles of the coast; the mouth of the Khwa forms a good anchorage for small boats.

The rocks in the Arakan Range and its spurs are metamorphic, and include clay, slates, ironstone and indurated sandstone; towards the south, ironstone, trap and rocks of basaltic character are common; veins of steatite and white fibrous quartz are also found.

During the Myanmar civil war, the town was the site of clashes between the Arakan Army and Myanmar's military, with the Arakan Army taking control of Ngapali beach and several military outposts surrounding the town.