coomba-bay postcode nswdl Home ›› Postcode Finder ›› NSWDL ›› Coomba-Bay Coomba Bay local listingsThe suburb of Coomba Bay is located in NSW and has a postcode of 2428. Free coomba bay business listing! Get the first free listing in coomba bay! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.