Skip to content
WatermansYacht agents
Menu
The entrance to Portsmouth Harbour from above, with Gosport to the left and the Spinnaker Tower beyond

Portsmouth

Portsmouth is a naval dockyard port under the King's Harbour Master, with berths to 80m at Gunwharf Quays just inside the entrance.
The harbour entrance and Gunwharf Quays. Marker at Gunwharf Quays. Chart by savvy navvy. Not to be used for navigation.

Brief

Portsmouth Harbour is the Dockyard Port of Portsmouth, under the King's Harbour Master, entered from the Solent past the Round Tower between Portsmouth Point and Fort Blockhouse. The entrance is a declared narrow channel with a strong cross-tide, and it closes to other traffic when warships move. Superyachts berth at Gunwharf Quays just inside the entrance, at Haslar and Royal Clarence on the Gosport side, and at the quays of Portsmouth International Port; Trafalgar Shipyard lies up Portchester Lake.

Approach

Every vessel using the main channel reports to the King's Harbour Master on VHF 11 and confirms its ETA at the Outer Spit buoy an hour ahead. From the east, a yacht reports at 50°40.0'N giving the distance from the Nab Tower, then asks to enter the main channel between Horse Sand Fort and No Man's Land Fort. From the west, it reports at Prince Consort buoy, then asks to enter the Bar channel from the Swashway, or the main channel abeam Mary Rose buoy.

The Swashway is a channel for shallow draught, led on 049°T. The Inner Swashway is closed to vessels over 20m, which keep to the approach channel between the entrance and No 4 Bar buoy. Ryde hovercraft and fast catamarans cross the Swashway at more than 24 knots.

The Small Boat Channel runs 50m wide down the western side of the entrance from Ballast pile to No 4 Bar buoy. Vessels under 20m must use it, under engine; a vessel over 20m may use it only with the King's Harbour Master's express permission. It stays open when large ships close the main channel, but shuts during aircraft carrier transits. The cross-tide in the entrance runs at up to four knots at springs.

A vessel over 20m enters and leaves only under the King's Harbour Master's direction, asks permission before leaving a berth or weighing anchor, and asks again before passing the Saddle buoy inbound. It keeps a continuous watch on VHF 11, with VHF 13 used for naval movements, and does not move in visibility under a quarter of a mile without permission. To reach Gunwharf Quays a yacht crosses the harbour only north of Ballast pile and with permission, with its berth booked first.

Vessels keep 50m off warships alongside or at anchor and 100m off submarines. An exclusion zone of up to 250m can be set around a warship underway, which shows two diamonds by day and two red flashing lights at night, and all small-craft traffic in the entrance stops while it passes. A ship over 135m in the Precautionary Area carries a Moving Prohibited Zone, 500m ahead and 50m either side. The speed limit is 10 knots through the water in the harbour and within half a mile of the low water line elsewhere in the Dockyard Port.

Pilotage

Pilotage is compulsory at 48m and over, and at 20m and over with more than 12 passengers; a deployed bowsprit counts in a sailing yacht's length. Portsmouth City Council is the competent harbour authority, and the pilot boat monitors VHF 09. A vessel of 150m or less boards near the St Helens buoy, and from the western Solent about three quarters of a mile north west of North Sturbridge.

The pilot is booked at least 24 hours ahead with length, beam, draught, last port and berth. The ETA follows eight hours before arrival and is confirmed on VHF 11 two hours before; no pilot is sent without that confirmation. Outbound and shifting movements need eight hours' notice and the same two-hour confirmation.

For a vessel up to 70m the 2026 charge is GBP 568, GBP 710 from the Nab and GBP 140 berth to berth, with GBP 285 added north of No 96 pile. A transit west of the line from Gilkicker to Ryde Pier that stays south of Gilkicker, Horse Sand Fort and the Cambrian Wreck is exempt.

Tides

Reference
Portsmouth
Entrance, springs
Cross-tide to about 4 knots
Heights for the day are in the predictions below. Free flow at the Port Solent lock does not always run at neaps or extreme springs. Heights are from published tide tables and are checked against the Admiralty predictions for the day.

Portsmouth

  • High water, Thu 24 Sept, 23:09 4.3m
  • Low water, Fri 25 Sept, 04:28 1.2m
  • High water, Fri 25 Sept, 11:37 4.6m
  • Low water, Fri 25 Sept, 16:50 1.2m
  • High water, Fri 25 Sept, 23:41 4.5m
  • Low water, Sat 26 Sept, 05:04 0.9m

Admiralty predictions, UK time, refreshed hourly. Planning information, not for navigation.

Berths

Gunwharf Quays
OperatorGunwharf Quays Marina
Maximum LOA80m
Depth5.5m
NotesInside the entrance. Pontoons A 55m, B 78m, C 71m; 63 and 125 amp three phase, own cable and plug; water at every berth. Booked on VHF 80 or 023 9283 6732. GBP 9.75 a metre a night for 30m and over, 2026/27
Haslar Marina
OperatorPremier Marinas
Maximum LOA40m
NotesGosport side, no tidal restriction. A superyacht berth; over 20m on application
Royal Clarence Marina
Depth4m
NotesGosport side. Over 150m of alongside berthing
Gosport Marina
OperatorPremier Marinas
Maximum LOA30m
Notes16 amp; 32 amp on request
Port Solent
OperatorPremier Marinas
Maximum LOA24m
NotesUpper harbour through a lock worked 24 hours, with free flow at the top of the tide. Call from Green 78 pile on VHF 80
Albert Johnson Quay
OperatorPortsmouth International Port
Maximum LOA285m quay
Depth7.3m
Notes240m maintained. Pleasure craft over 65m at a recognised berth GBP 221.50 a day, 2026
Flathouse Quay
OperatorPortsmouth International Port
Maximum LOA164m
Depth8.3m
Notes190m quay
Trafalgar Wharf
OperatorPremier Marinas
Depth1.5m
NotesPortchester Lake. Over a cill, about two and a half hours either side of high water
Operators' published figures, checked 23 September 2026, confirmed before quoting. The superyacht Ilma called at Portsmouth International Port in July 2025.

Alongside

There is no fuel or bunkering at Gunwharf Quays. The Gosport fuel pontoon has self-service diesel and unleaded, on VHF 80 or 023 9252 4811, and Port Solent a serviced fuel pontoon. A larger yacht bunkers at Portico's berth on Albert Johnson Quay, supplied by Certas Energy.

Gunwharf Quays takes general waste by the bin at GBP 55 a bin, and catering waste only by prior request; it cannot take hazardous waste. Haslar accepts hazardous waste, and ship waste at Portsmouth International Port needs 48 hours' notice.

Ashore

Southampton Airport is about half an hour by road. Solent Airport Daedalus at Lee-on-the-Solent is open seven days and offers helicopter transfers to London. Portsmouth Harbour station has direct trains to London Waterloo in about an hour and fifty minutes, and the Historic Dockyard, with HMS Victory, the Mary Rose and HMS Warrior, is five minutes' walk away. Queen Alexandra Hospital is at Cosham.

Trafalgar Shipyard in Portchester Lake lifts to 60m and 877 tonnes, and Endeavour Quay at Gosport to 40m and 180 tonnes, with 130m of deep-water pontoons.

Questions

At what length is pilotage compulsory at Portsmouth?
Pilotage is compulsory at 48 metres and over, and at 20 metres and over with more than 12 passengers; a deployed bowsprit counts in a sailing yacht's length. The pilot is booked at least 24 hours ahead, and the ETA is confirmed on VHF 11 two hours before arrival.
Who controls a yacht's movements in Portsmouth Harbour?
The King's Harbour Master. A vessel over 20 metres enters and leaves under the King's Harbour Master's direction, keeps watch on VHF 11, and asks permission before leaving a berth or weighing anchor.
Where do superyachts berth in Portsmouth?
Gunwharf Quays, just inside the entrance, takes yachts to 80 metres on pontoons of 55, 78 and 71 metres. Haslar Marina on the Gosport side takes yachts to 40 metres, and Albert Johnson Quay at Portsmouth International Port takes pleasure craft over 65 metres.
Where does a yacht take fuel in Portsmouth?
There is no fuel at Gunwharf Quays. The Gosport fuel pontoon has self-service diesel, and a larger yacht bunkers at Albert Johnson Quay.

Charges are revised each year. This page is a guide, not a quotation.

Sources

King's Harbour Master Portsmouth General Directions and Local Notices to Mariners (Internet Archive copies, the live pages refusing access); Dockyard Port of Portsmouth Order 2005; Portsmouth International Port pilotage and 2026 dues, rates and charges; Gunwharf Quays Marina superyacht guide and 2026/27 tariff; Premier Marinas; Solent Handbook; Solent Airport; South Western Railway; NHS. Checked 23 September 2026.