He came to the throne in 1356 at the death of his father by the hands of men of Rhudaur.
Arthedain and Cardolan kept a watchful guard at the line of the Weather Hills around Weathertop, the Great Road, and the lower reaches of the river Hoarwell. During this time Rivendell was besieged by Angmar.
Arveleg was killed in 1409 T.A., when a great host from Angmar suddenly broke the lines, overrunning Cardolan and destroying the fortress at Weathertop. Arveleg was slain but the Palantír of Weathertop was saved.
Arveleg was succeeded by his not yet full-grown son Araphor.