The Port of Southampton is a deep-water port on the central south coast of England, at the head of Southampton Water where the rivers Test and Itchen meet, sheltered from the English Channel by the Isle of Wight. It is the second-largest container port in the United Kingdom after Felixstowe, handling about 1.5 million TEU a year, and the country’s busiest cruise port, with 1.9 million cruise passengers in 2019. Its first modern dock opened in 1843, and it is also the UK’s leading port for vehicle exports. It matters because a double high tide lets the biggest ships in service reach it for up to 80% of the time, making it the largest freight port on England’s Channel coast and a deep-sea gateway for southern England and the Midlands. The numbers below explain how.
4 Metres of Tide and 17 Hours of Rising Water
Southampton’s first advantage is its water. Southampton Water is a ria, a drowned river valley about a mile wide, formed at the end of the last ice age when rising seas flooded the valleys of the Test, Itchen and Hamble. It was deep even before dredging, and its bed of soft silt has made deepening it comparatively easy. At its mouth, the mass of the Isle of Wight protects the estuary from the worst of the Channel weather.
The second advantage is the tide. The average tidal range at Southampton is about 4 metres, but the water level rises for around 17 hours in every day because of the port’s double tides. The cause lies in the Channel. High water at Dover comes at about the same time as low water at Land’s End, so a point near the middle of the Channel gets two high waters as the tidal swell moves first one way and then the other. Neither is as high as the tide at either end, but together they give a long stand of high water.
In practice this matters more than any single berth. According to the container operator, DP World Southampton, the double tide means the largest container and cruise ships can use the port for up to 80% of the time. Dredging took the main channel to 19 metres, a depth that allows today’s biggest box ships to come alongside.
1.5 Million TEU at Berths SCT 1 to 5
The container terminal sits on the west side of the port, beside the River Test, and was built entirely on reclaimed land. Its first berth, 201, opened in 1968, and the quay originally ran from berth 201 to 207. The berths have since been renamed: 207 to 204 are now SCT 1 to 4, and the rebuilt 201 and 202 form SCT 5. That last quay was reconstructed in 2014 to take ships 400 metres long, after the Marine Management Organisation approved the extension.
The terminal has 210 acres (85 hectares) of land for port operations, not counting the 375 acres (152 hectares) of the older Western Docks. It can work four large deep-sea ships at once, plus a smaller vessel of up to 150 metres. The throughput of about 1.5 million TEU puts it second in Britain to Felixstowe, which handled 3.85 million TEU in 2017 and takes almost half of the country’s container trade.
Ownership has changed several times. The container terminal was owned and operated by Associated British Ports (ABP) from 1982. It is now DP World Southampton, wholly owned by DP World after it bought ABP’s 49% stake, and in 2015 its operating licence was extended to 2047. Inland, the railway from the terminal has been upgraded to the W10 loading gauge as far as the terminal in Birmingham, so trains can carry the taller containers now widely used. That rail link, and road links that bypass London’s congestion, give a south-coast port a route to cargo bound for the Midlands.
400, 366 and 345 Metres: The Ships and the Dock That Set the Limits
Southampton has repeatedly rebuilt itself around the length of the ships it wanted to handle. The chart compares the port’s landmark structures with the vessels they were built for.
The King George V Graving Dock, also called No. 7 Dry Dock, was built in the Western Docks for the new Cunard liners RMS Queen Mary, 311 metres long, and RMS Queen Elizabeth, 314 metres. It is 366 metres long, 41 metres wide and over 15 metres deep, held about 264 million litres of water, and could be pumped dry by four pumps in just over four hours. Building it took two years, the removal of two million tons of earth and more than £2 million. King George V and Queen Mary opened it on 26 July 1933, sailing into the unfinished dock aboard the royal yacht Victoria and Albert, and it was the largest graving dock in the world for nearly thirty years. In 2005 its caisson gates were removed and it became a permanent wet dock.
The dock was part of the westward expansion of the port by the Southern Railway, which built the New Docks, now the Western Docks, as berths 101 to 110. Together with the Old Docks at the junction of the Test and Itchen, berths 20 to 49, and the container terminal, they make up the port’s three main areas.
1.9 Million Cruise Passengers in 2019
Cruising is where Southampton leads Northern Europe. In 2005 the port handled 738,000 cruise passengers, more than in any single year of the previous century. The number rose every year after that, reaching 1.9 million in 2019 across about 520 ship calls, and Southampton is the busiest cruise turnaround port in Northern Europe. Each call is worth an estimated £1.25 million to the local economy.
Five terminals handle them: the Queen Elizabeth II Terminal at berth 38/39 (opened 1966), the Mayflower Cruise Terminal at berth 106 (1960), the City Terminal at berth 101 (2003), the Ocean Terminal at berth 46 (2009) and the Horizon Cruise Terminal at berth 102 (2021). The Mayflower and Horizon terminals gained shore power in 2021–22, letting ships plug into the grid instead of running their engines at the quay. The largest ship using the port is P&O Cruises’ Arvia, 345 metres long, 184,700 gross tonnage, with room for 5,200 passengers.
Cunard’s Queen Mary 2 is the only ship still running a scheduled transatlantic service, between Southampton and New York. When she entered service in 2004 she was the longest passenger ship yet built at 345 metres, and she remains the largest ocean liner ever built.
22 Million Tonnes of Crude at Fawley
One of the biggest flows of cargo on Southampton Water does not use the city docks at all. Downstream, on the western shore, Esso’s Fawley Refinery is the largest in the UK, with capacity of 270,000 barrels a day, about 20% of the nation’s refining capacity, and it employs more than 2,500 people. Its mile-long marine terminal handles about 2,000 ship movements and 22 million tonnes of crude oil a year. A pipeline completed in 1972 carries aviation fuel from Fawley to the West London Terminal at Hounslow for Heathrow Airport, and a replacement line was finished in November 2023. The refinery site was chosen in 1921 partly because much of its early output fuelled the liners at Southampton Docks.
Across the water, the BP terminal at Hamble stores and ships crude oil and refined products. Other cargo is smaller but steady: a bulk terminal handling over a million tonnes a year of crushed rock, sand, fertiliser, grain and scrap; 14,500 square metres of refrigerated storage and a dedicated terminal handling about 80,000 tonnes of fresh produce a year, much of it from the Canary Islands; and seven multi-storey vehicle parks with 53 acres of storage for the car trade.
1620, 1843 and 1912: The Dates Behind the Docks
The port’s record goes back long before its first dock. In July 1620 the Mayflower anchored at Southampton and waited for the Speedwell to arrive from Holland with members of the Leiden congregation. The two ships sailed around 5 August, but Speedwell’s leaks forced them back twice, and the Mayflower finally crossed alone from Plymouth. The modern port began in 1843, when the first dock was inaugurated. On 10 April 1912 the White Star liner Titanic sailed from Berth 44 on her maiden voyage to New York; she sank on 15 April with the loss of about 1,500 lives. Between the world wars, Southampton handled nearly half of the UK’s passenger traffic.
April 2005: The Dibden Bay Refusal and the 15-Minute Hythe Ferry
Not every expansion plan has gone ahead. In April 2005 the government accepted a planning inspector’s recommendation to refuse ABP’s proposed container port at Dibden Bay, reclaimed land between Hythe and Marchwood beside intertidal marshes protected under the Ramsar Convention. The Hythe Ferry still crosses the estuary from Town Quay to Hythe in about 15 minutes, saving a 10-mile road journey, and its pier railway, running since 1922, is the oldest pier railway in the world.
To compare Southampton with the country’s biggest box port, see our guide to the Port of Felixstowe; for the waterway that gives it the double tide, read about the English Channel, and for the giants it competes with, our list of the world’s busiest ports.