The RYA, has confirmed that a leg of the prestigious event will take place from June 8-14, 2015.
Returning to the London 2012 Olympic and Paralympic waters, the World Cup stage will be the fourth of the six-leg revamped elite series.
Racing will be conducted over five days with the fifth day of racing deciding who will take home the medals in a spectacular Medal Race day format for all classes.
Weymouth and Portland will join Hyeres, France, as the other European venue and will add to the line-up, which starts in Melbourne, Australia in December before visiting Miami, USA in January 2015.
With the best Olympic classes sailors competing for a place at the final in Abu Dhabi in November 2015, the stage is set for intense racing.
RYA racing manager and performance director John Derbyshire, said: “Early confirmation of the event dates for 2015 helps everyone to start planning and preparing.
“This is especially important for overseas competitors and the teams of volunteers, both ashore and afloat, required to help support such an elite event.
“While the ISAF World Cup will not be coming to UK shores for another nine months it’s vital to start getting the pieces in place for us to be able to provide a quality run event that seamlessly fits into the rest of the series.”