IOW
Bembridge/ Sandown may be a bit dead - you need to stretch those legs to seek the entertainment. Plenty of places to go on the coast. Plenty of excellent places to eat.
Anyway - what better than flying across the Solent to get there?
If the weather is looking half reasonable - try Dieppe for lunch. Clear at Calais and have a wonderful chug down the coast. Taxi ride is around a fiver into town.
The restaurants around the harbour are OK but try the Sarajevo in the town.
Less adventurous? The restaurant on the airfield at Calais is cracking.
Weekend of it?
Try Ile D'Yeu. Awesome place. Quiberon is good too.
You will find lots of Brits at Le Sable D'Olonne for the entire last 2 weeks of June. Shhh! Best kept secret of all French destinations! Come and join in the fun.