It might be very difficult to find a wheelchair accessible beach without having to worry about renting a special equipment. When we visited Berrow Beach in Brean, UK, all we used was a regular power chair and had no problems with rolling on the sand (mobility scooters are also ok, haven’t try a manual chair there yet). We just kept to the part of the beach where the cars are allowed, had a fantastic, long walk with the dog and could get very close to the sea.
There is a car park on the beach open till 6 pm. If you park on the beach, you avoid one small part of very uneven ground which is otherwise at the entrance.
There were also fish & chips and ice cream vans when we went. There are a few accessible restaurants and arcades nearby.
A perfect place to enjoy a family day out, walk the dog (the beach is dog friendly all year round), fly a kite or have a picnic on the beach.