The £15 million complex, which will also host the Paralympics events, was brought in under budget and ahead of schedule.

 

The world-class facility will play host to 400 athletes completing in 10 Olympic sailing categories.

 

Ralph Luck, of the Olympic Delivery Authorit y (ODA), will today join gold medalist Paul Goodison at the unveiling.

 

David Higgins, the chief executive of the ODA, said: "Weymouth & Portland was the first venue for 2012 to start construction work, so reaching the final stages of the project is another important milestone".

 

The British sailing team's successes at the Beijing Olympics included a haul of six medals, four of them gold and the early completion of this venue gives them an opportunity to train and prepare in Weymouth during the build-up to 2012.

 

Goodison, who won gold in the Laser class at Beijing, said: "We save a lot of time travelling around the world when we can get out of bed and it is here on our doorstep.

 

"It is a fantastic opportunity, not just for myself, but some of the youngsters to see us in 2012 and aspire to 2016."

 

Councillor Howard Legg, Weymouth and Portland council's special projects portfolio holder, said: "It is ahead of time, on budget and opening today.

 

"It is great news for the community.

 

"This is a real local effort, and it is not just people involved with sailing.

 

"We have hoteliers learning different languages to help welcome people here in their own language."

 

John Tweed, chief executive of Weymouth & Portland National Sailing Academy, said: "With these enhanced facilities they [sailors] will really be able to hone their skills before the 2012 games.

 

"It is just a fantastic upgrade to what is already here."

 

A 656ft (200m) breakwater protects the new facilities with a new pier offering two yacht-lifting cranes and a pontoon providing 70 berths for race boats.

 

The start of construction, using 70,000 tonnes of Portland stone, was delayed to avoid disrupting the nesting season of over-wintering birds around the local coastline.

 

Osprey Quay, a development to one side of the academy which will include a 560-berth commercial marina, is also on schedule.