I'm afraid thats not the best area for waves. More ocean swell (although its not on an ocean) as the beaches are predominantly steeply shelved so the real waves break very close to the beach.
Depends on the wind directions and how far you are willing to travel but..
Mudeford Quay - launch off the beach. Sandbar on the other side of the estuary that generates rideable waves. Branksome Chine gets a bit of swell in a storm. Kimmeridge bay (only place to get genuinely big waves (2-3m+) but doesn't go off very often. Mainly surfers and windsurfers. Overcombe beach at weymouth gets regular small waves. Best in a SW (prevailing wind direction) Boscombe beach?? The council built an artificial reef here a few years ago. Apparently it didn't work for regular surfing (too steep) but might be worth a look?
Isle of wight (as above) has lots of good spots but is pricey to visit (25 mins drive to nearest ferry + 1 hour on the ferry + drive to spot) so may be too far to get to.
Tons of spots Tiree Gower peninsula Rhossy West coast of ireland Everything's is a pretty short trip Even Europe , easy jet £ 30 early bookings to most euro spots from the uk There inlaws, it's not like real family
i went to uk last year and kited some beach in north cornwall - was actually pretty meaty waves - was fun... wind was generally fickle though in summer with bursts of goodness.