There is no vehicular access to the Watchtower as it stands on the farthest point of Porthdinllaen head, next to the Coastal Path. After leaving your car in Morfa Nefyn at, for example, the (chargeable) National Trust Car Park between Lon Pen Rhos and Lon Golff, you walk uphill to the Golf Club. From there, pass through the kissing-gate and follow the path downhill. Ignore the turning on the right, which drops down to the beach and the famous Ty Coch Inn, head briefly uphill, then move to the left hand side of the headland and follow the Coastal Path down to the Tower which is now clearly visible ahead. The walk from parking to the Tower will take approximately 35 minutes.