You will have to keep an eye on the tides, but if you don't mind getting your feet wet it is all good. May require a bit of rock jumping if high tide.
It will be a bit of a scramble getting from the beach to Ground Zero, but it is do-able. Cache is about 10 metres from water mark.
The cache is a green container with geocaching.com written on it. It is about 200ml in size.