The sailors have collected an impressive three gold, a silver and a bronze in round six of the World Cup.
Nathan Outteridge and Iain Jensen won gold in the 49er class, while AIS team-mate Tom Slingsby claimed gold in the Laser class on the final day of racing.
Importantly, the English venue will host the Summer Olympic Games to be held in 2012.
Outteridge and Jensen headed into the final race in what has become a familiar position for them, with a handy 16 point lead over the second placed French team.
"It's great to win three in a row here, we love sailing here as it suits us really well,' Outteridge said.
"We're working out the conditions every time we come here so we're in a good position heading into the Olympics next year and hopefully we can keep on coming back here and continue the way we're going."
Tom Slingsby's win in the Laser class was not only his third straight in Weymouth but back-to-back World Cup wins, following taking gold two weeks ago in Holland, taking his run to nine straight World Cup medal placings on the podium.
"I'm feeling really confident now, this is a new boat and I felt a bit uncomfortable at the start of the week but I'm just trying to adapt to different types of boats and I'm feeling great," said Slingsby.
"Three wins from three starts here is pretty good and I'm looking forward to coming back for the Olympic Test Event in a few weeks."