Yarmouth Harbour sits on the northwest coast of the Isle of Wight, positioned behind a breakwater that extends from the western bank of the River Yar.

It is the island's most westerly harbour and a busy terminus for the Wightlink ferry service crossing from Lymington, as well as a popular destination for visiting leisure craft.

The harbour is accessible at all states of the tide, with approaches maintained at 2. 5 metres below chart datum and 2 metres below chart datum inside the harbour. Vessels can communicate with the harbour on VHF Channel 68.

A swing bridge on the River Yar provides access further upstream, operating on a schedule of fixed opening times during the summer season.