The beach at Borthwen is a bay of sand backed by low dunes, with some smaller sandy coves on either side. There is a small P&D car park, reached along a lane from the village of Rhoscolyn. This lane is extremely narrow with sharp corners, and only just enough space for cars and pedestrians to pass. If the car park is full, vehicles must return to the village where there are some more (roadside) places to park. On a busy day, it's best to park in the village and walk - a footpath off to the left at the rear of the chapel makes a more interesting route than the lane.
Facilities at the beach include toilets, cold water showers and a slipway for launching boats. A Beach Warden is on duty from end of May to early September to collect launch fees etc. Due to its proximity to Valley airfield, there can be frequent noise from aircraft. Dogs are allowed at all times.
To the south west of the main beach is the smaller, sandy cove of Porth y Corwgl (one of three Anglesey coves with this name), which is generally much quieter than its neighbour. This is a narrow, sheltered cove which looks out to the islands of Ynysoedd Gwylanod.