As per this article: http://www.bbc.co.uk/news/uk-england-hampshire-30186858
The ACWS will run at Portsmouth between 23rd and 26th of July.
And as luck would have it, its during the week I've already got booked off next year. I was going to do some cruising down the South Coast, maybe to Poole, so hopefully I can catch some of the action that week on my travels.
It should be an awesome spectacle watching the catamarans flying down the Solent.