Nine Mile Beach
Nine Mile Beach is an awesome beach on the east coast and is very dog friendly (off lead - under effective control) all year round.
We visited this beach when we were staying at an Airbnb private rental that had it's own private access.
The main public access is off Dolphin Sands Road, but as we didn't use this - we can't comment.
Our private path wasn't exactly 'wheelchair friendly' and involved a fair bit of work to get the wheelchair down to the beach...but so worth it for Mum. We were in luck - tide out and the sand really firm so we were able to wander 6km along the beach towards Swansea...just beautiful! We came off the beach just before Meredith River as unfortunately couldn't continue on due to the river mouth...this path was pretty awkward and we wouldn't recommend this as wheelchair friendly.