Northern lights in Anglesey tonight

South Stack is a small island off the western tip of Holy Island, connected to the Anglesey mainland by a footbridge below the RSPB Ellin's Tower visitor centre. The clifftop above the lighthouse gives the most open western and northern horizon on Anglesey, with the Irish Sea visible in all directions above the cliffs. The access road ends at the RSPB car park, free at night; the clifftop walk to the best viewpoints takes 5 minutes on a clear path. Holyhead's port lights are visible 3 km to the north but do not dominate the western horizon. Bortle Class 2 on the clifftop. The road is tarmac throughout and the car park has toilet facilities.

Newborough Warren is a National Nature Reserve on the southern tip of Anglesey, covering an extensive dune system and the tidal causeway to Llanddwyn Island. The beach faces southwest across Caernarfon Bay with views south toward the Llŷn Peninsula. The northern view from the dune system is open over the Warren and the Menai Strait beyond. At night the beach is completely dark; the nearest light source is Newborough village 3 km east. Bortle Class 2 from the beach. The NRW car park at Llanddwyn has timed parking barriers; arrive before dark or check the NRW website for out-of-hours access. The forest track to the beach takes 15 minutes by foot.

Mynydd Twr is the highest point on Holy Island at 220 m, immediately behind Holyhead. The summit gives 360-degree views across the Irish Sea with the Wicklow Hills of Ireland visible in clear weather 90 km to the west. The northern horizon extends over open sea toward the Isle of Man. Holyhead port lies 2 km to the northeast and produces a light dome that affects the northeastern sky; the western and northern arc toward Ireland is considerably cleaner. A car park on the mountain road below the Iron Age hillfort gives easy access; the summit is a 15-minute walk on a clear path. Bortle Class 3 overall, improving toward Class 2 on the seaward face.