Immediately upstream of Molesey Lock.
The lock cut is the Left (southwest) bank side of this island.
The tail of the island has a weir to the head of Molesey Lock.
The head of the island has a weir to the Right bank.
Ash Island has moorings on both the south and north sides of the Island. The idyllic island is privately owned and is home to a thriving community of more than 30 houseboats. There is a boatyard and launderette on the island.
The only access from the land is by foot from the south of the river via the Molesey Lock and a weir bridge. A few of the residential moorings are freehold.
1874: Weir at Ash Island painted by Alfred Sisley -
Weir at Ash Island, 1928
1930s: Ash Island with Taggs Island beyond -
Ash Island with Taggs island beyond