Wanderers had taken a first-half lead after Seagulls winger David Lopez put through his own net, but four second-half minutes saw Brighton score three times to leave Dougie Freedman's men still without a win this season.
Jay Spearing put through his own goal in the 53rd minute, before Inigo Calderon and Will Buckley both found the net to stretch the Amex club's unbeaten run to six matches.
David Ngog failed to keep his cool when one-on-one with keeper Tomasz Kuszczak, who made a save down low to deny the French striker after a mix-up in the Brighton defence.
More top news
Rhianna Clavering from Ferring is now 4 inches taller and showjumping again after the pioneering surgery.
Extra security was added to the area around the disabled viewing platform for Sunday's performances.
Philippa has the latest weather update for the east