Sandspit Marina sits on the Matakana River alongside the Sandspit Yacht Club, about 40 minutes north of Auckland's Harbour Bridge near the town of Warkworth.

The protected tidal harbour offers 131 floating-pontoon berths ranging from 12 to 18 metres, with water depths of 1. 5–2 metres. Note that the estuary entrance is limited to a draft of 1. 5 metres at low tide.

Managed by the not-for-profit Sandspit Marina Society, the facility provides a well-sheltered base for cruising to Kawau Island, the Hauraki Gulf, and Great Barrier Island.

On-site amenities include shore power, water, toilets, showers, laundry, fuel, and haul-out services operated by the Sandspit Yacht Club. The surrounding area puts boaters within easy reach of Omaha and Pakiri beaches and the Goat Island Marine Reserve.