hi,
The
Stockholm weather in August will be sunny and perfect for your vaction, but evenings will be littlt bit cold, so take a jacket for the evenings!
The nightlife activities are pretty much in Stockholm year around and some of the clubs and bars like upmarket area in central Stockholm, Hells Kithchen, Laroy, Josefina, Ambassadeur and Hotellet will offer you enough entertainment. If you want hip and cool then Stureplan is the best choice!
I think 3 days is sufficient to visit lovely places and not too long at all as you can do day trips to the lovely archipelago, The
Vasa Museum and islands like Grinda,Sandhamn,Uto and many many more!
hop this helps!
I suggest The Sheraton Stockholm is one of the best choices for having spa and lake view. It is located in the centre of Stockholm and very near to the shopping and Stockholm attractions. As per your wish it offers stunning views of Lake Mälaren, so request a room with a lake view and enjoy your holidays, Have fun!!!