Turn off the coast road from Weymouth to Bridport ( B3157) on a bend at the bottom of a steep hill that is signposted to the Subtropical Gardens. Go past the gardens and car parks to the end of the lane, there is a car park on your left. An attendant will take money from you in the tourist season but not in winter. There is a toilet block in the car park. Access to the beach is made easier by the boarded walkway to the crest of the bank, after this it is loose shingle; the beach is quite steeply banked and gives access to deep water.
The usual Chesil comment applies here.....do not even think about going onto the beach to fish with a big sea running