Josh Andrews scored twice as Accrington consigned Forest Green to a sixth straight League Two loss.
Stanley opened the scoring after 18 minutes. Shaun Whalley's free-kick sent Jack Nolan racing down the right and his cross was headed home by on-loan Birmingham striker Andrews.
Andrews headed over minutes later and Forest Green goalkeeper James Belshaw tipped a Whalley strike over the crossbar as Stanley took hold of the game.
However, Forest Green came close just before half-time when a thumping header from Kyle McAllister was kept out by Stanley goalkeeper Jon McCracken's legs.
Unmarked Troy Deeney headed wide in the opening stages of the second half before Stanley got their second after 51 minutes.
Nolan's deep cross to the far post was headed home by Andrews from around two yards out.
Joe Pritchard curled an effort wide for Stanley while Rovers had their chances through Jacob Maddox and Reece Welch.
They found a way through after 83 minutes when Fankaty Dabo teed up fellow substitute Mathew Stevens in the area and he headed home, but Rovers dropped to the bottom of the table with the defeat.
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