Evil Tide is an adventure module, or pre-packaged adventure booklet, ready for use by Dungeon Masters in the Dungeons & Dragons (D&D) fantasy role-playing game. The adventure was published by TSR in 1997 for use with the second edition Advanced Dungeons & Dragons rules. The module was written by game designer Bruce R. Cordell. In the adventure, the characters investigate Sahuagin attacks on Angler Island and the disappearance of some local explorers.
Evil tide is the first in a trilogy of modules, which includes Night of the Shark and Sea of Blood. This trilogy supports the game supplements The Sea Devils and Of Ships and the Sea, both also published by TSR.
It was designed for four to eight player characters of 5th- to 7th-level.