Bilgola Creek rises about 1 kilometre (0.62 mi) west of Bilgola Head and flows generally east by south, from the Bilgola Escarpment through Littoral rainforest, coastal woodland and coastal clay heath communities directly out onto Bilgola Beach and into the Tasman Sea. A smaller ephemeral creek line also flows down from the escarpment at the northern end of Bilgola Beach.