If you would like to take a boat trip a little further afield and fancy exploring the Isle of Wight, there is a larger boat that does cruises from Keyhaven to Yarmouth. Solent Rose operates day-trip services during Spring and Summer, from Spring bank holiday to mid-September.
Crossings take approximately 40 minutes and are subject to weather conditions. These trips are a fantastic way to relax and see the stunning scenery of Keyhaven river and marshes, the Solent and Yarmouth harbour on the Isle of Wight; if the weather conditions are good you'll also get a stunning view of Hurst Castle and the Needles rocks off the Isle of Wight.
For their schedule and prices you're best checking out their website.
Solent Rose is also available for private hire, for parties from 4 to 94 people - contact them to find out prices and availability.