Newhaven Marina sits at the mouth of the River Ouse where it meets the English Channel, nestled below the South Downs on the East Sussex coast.

The marina serves as a natural endpoint for paddlers and sailors navigating the tidal lower Ouse, with Newhaven also functioning as a commercial port offering ferry crossings to Dieppe, France.

For those paddling the Sussex Ouse from inland put-ins such as Barcombe Mills or Lewes, Newhaven represents the tidal river's final destination before the sea.

The lower stretch of the Ouse is strongly tidal, and timing any approach to the marina requires careful attention to tidal conditions.