Colwyn bay beach from Old Colwyn to Rhos On Sea is a safe beach to fish at low water with no dangerous gullies. If your fishing over low it would be best to fish into evening or early morning and go towards the headland or off the beach by the arches. You can fish off the prom at high even on low tides and again fishing into evening is best but you can get mackerel in the daytime if the water's clear enough.