Trevessa Beach is a hamlet in the Canadian province of Saskatchewan. It is within the Rural Municipality of Meota No. 468 on the eastern shore of Jackfish Lake.
In the 2021 Census of Population conducted by Statistics Canada, Trevessa Beach had a population of 52 living in 28 of its 41 total private dwellings, a change of from its 2016 population of 60. With a land area of , it had a population density of in 2021.