HMS Thais was a ten-gun Cherokee-class brig-sloop launched in 1829.

Thais replaced HMS Zephyr at Falmouth, serving as a Post Office packet.

Thais, Lieutenant Charles Church, sailed from Falmouth on 12 December 1833, bound for Halifax, Nova Scotia.

In March and April 1834, her wreckage washed ashore at Galway, Ireland.

King, presumably found in the wreckage, reported that by 24 December she was at 50°00′N 16°8′W / 50.000°N 16.133°W / 50.000; -16.133, heading northward with the wind WNW.