About us

about us

About Thornham Marina

Thornham Marina, nestled in a rural part of Chichester Harbour at the top of Prinsted Bay, is a delightful haven for boat owners. With 81 drying pontoon berths, 13 swinging moorings, it has additional berths within a gated deep water pool, which maintains a depth of 1.75m.

The marina offers annual berthing, storage ashore, winter packages, and short-term storage deals for boat owners based across the South Coast and London. Each pontoon berth has access to fresh water and electricity, as do all the shore berthing spaces throughout the yard.

The pontoon berths are popular with catamarans, motorboats, centreboarders, and vessels up to 12m in length and draw up to 1.2m or are happy to take the mud at low water. The marina and boatyard give excellent shelter for winter berthing and shoreside storage.

Our facilities

Thornham offers boaters a traditional marina experience with first class marina facilities, due to a programme of steady investment and renovation. The sheltered waters of Prinsted Bay readily opens out into the main body of Chichester Harbour, with the Solent beyond.

State of the art lifting facilities include a 12 tonne fully submersible boat lift made by Swede Ship, a Telescopic Merlo Telehandler for stepping/un-stepping masts and a Wise boat hoist. On-site an active marine community includes a fully-stocked, modern chandlery, cover and sail repairer, traditional shipwright, rigger, dinghy sales and multihull broker.

Our background

The marina site was purchased in September 2002 by Jonny Boys, who instigated a long term programme of refurbishment and renovation that has modernised the marina facilities whilst keeping it’s traditional charm and atmosphere.

Brand new Walcon pontoons have been installed in the marina, a luxurious new shower block built, along with new offices and workshops for the marine tenants. A planning application is pending to build a new café facility.

Thornham Marina is now part of The Trafalgar Group, based at Trafalgar Wharf. Jonny acquired the former Vosper Thorneycroft site in 2008, at the top of Portsmouth Harbour and has totally renovated the site including a marina, boatyard, vast indoor Drystack and commercial Shiplift.

Stay at Thornham

Introduced in 2019, the elegantly designed Ark 900 boats are available for hire. Custom built between Thornham Marina and Walcon Marine, the Arks are a totally unique boat, spacious enough to accommodate two people.


Marina Office opening times:
08:00 to 16:30 Monday to Friday
09:00 to 15:00 Saturday
Closed Sunday

Tel: 02392 706 603

E-mail: info@thornhammarina.com

Thornham Marina
Thornham Lane, Prinsted, Nr. Emsworth, Hampshire PO10 8DD

Trafalgar Group
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© 2024 Thornham Marina, Chichester Harbour All rights reserved.
Thornham Marina Ltd, Part of TTG Portsmouth Ltd group of companies: Registered in England & Wales | Registered Office: Midland House, 2 Poole Road, Bournemouth, Dorset, BH2 5QY. 04529387 VAT no: 798281275