Hi Shelagh,
Welcome to Ribnet !
I reakon your probably about 1.5 hrs from Portmouth, This give you a fantsatic starting point for days and days of exploring the Solent, Isle of Wight, Southampton water, Portmouth harbours, Chichester Harbour, and all of the Many ports along the way. It also means whatever the prevailing wind, there is usally some where you can head for a lea shore.
Where ever you go hope you have fun !