Construction of Ramsgate Harbour began in 1749 and was not really finished until around 1850 - the kind of timeline that only made sense in an age when harbours were national infrastructure on a geological scale. Two architects, father and son both named John Shaw, gave the place the buildings that still define it: the clock house, the obelisk that marks the entrance, the lighthouse on the West Pier, and the angled Jacob's Ladder steps that connect the harbour to the town above. The granite walls were thrown out into water deep enough that, unlike most South Coast harbours, Ramsgate could keep ships afloat at all states of the tide. The lighthouse standing today was built in 1842 - eleven metres of Grade II listed stone, originally lit by an oil lamp through a fourth-order Fresnel lens. It replaced an earlier one by Benjamin Dean Wyatt that had been poorly sited and kept getting hit by passing ships.

George IV came to Ramsgate in 1821 with the Royal Yacht Squadron. He left charmed by the locals' welcome, and on his return to London he bestowed on the harbour the unique title Royal Harbour - the only one ever granted in Britain. The harbour mounted itself with pride and has not let go of the title since. In 2024 it added a second designation, Heritage Harbour. Both are technically just titles, but they matter to Ramsgate: a town in the easternmost corner of Kent, thirty-five miles closer to France than to London, has always defined itself by what comes in and out of its water. During the Napoleonic Wars Ramsgate was a chief embarkation point for British troops crossing the Channel. The same proximity made it pivotal again 130 years later, when in 1940 the harbour became one of the rallying points for the flotilla of little ships sailing for Dunkirk to lift the British Expeditionary Force off the beaches.

Ramsgate also has the distinction of an early lifeboat. A station was established at the harbour in 1802 by the trustees - more than twenty years before the formation of any national lifeboat organisation. The first boat was built by Henry Greathead, the pioneer who had developed the modern lifeboat design and whom Parliament that same year recognised as "deemed a fit subject for national munificence." The service lapsed between 1824 and 1851, then revived with a boat named for its sponsor, the Duke of Northumberland - built to the design that had won the 1851 national lifeboat competition. In 1859 a seaman named Jeremiah Walker, serving on the lugger Petrel, joined the rescue of the Spanish vessel Julia stranded off Ramsgate; for it he was given a medal struck on the authority of Queen Isabella II of Spain. On New Year's Day 1861 came the catastrophe of the Guttenburg, lost on the Goodwin Sands - the same sandbank a few miles offshore that, then as now, is the most dangerous flat the Kent coast can show a navigator. In 1865 the Royal National Lifeboat Institution took over the service, and it still runs Ramsgate's boats today.

The ferry years were a long, slow disappointment. Cross-Channel services to Dunkerque had run intermittently for decades before ceasing in 1966. In 1980 Thanet District Council invested £6.25 million in new ferry facilities for a new operator, Dunkerque Ramsgate Ferries, founded by Ole Lauritzen of Olau Line; within five months the operator had collapsed in arrest and the terminal had to be mothballed. Sally Line, run by the Finnish company Rederi Ab Sally, took over and ran services from 1981 through the 1990s. The Belgian state operator RMT joined in. The walkway collapse came on 14 September 1994: a foot-passenger linkspan between shore and RMT's Prins Filip failed catastrophically, killing six people and injuring seven more. Investigators found that the designer (Swedish firm FKAB) and the certifier (Lloyd's Register) had both made the same basic miscalculation. Total fines reached £1.7 million - the largest health-and-safety penalty in British history at that time. By 1998 the ferry operations had been restructured into Sally Direct in a last attempt to survive; at midnight on 20 November 1998 they stopped, and the port reverted to council ownership. Cars and limited freight have flickered through since, but the proposed Brexit-contingency contract collapsed in 2019, and as of January 2025 even the Port of Dover walked away from a tender to take over operations.

What works at Ramsgate today is the marina. The Royal Harbour's inner pool, locked off by gates that hold a constant water level, has seven hundred berths and a steady community of cruising sailors who appreciate the chance to come and go at any hour, not just on the tides. Outside the lock, the outer harbour has further moorings. A 280-metre quay built for the assembly of wind turbines now hosts the operations and maintenance base for the London Array, which spins beyond the horizon. Film and television crews use the place constantly: EastEnders, Liaison, Say Nothing, the 2025 film My Fault: London. The £30 million Harbour Approach Road, finally finished in 2000, slices in from the chalk cliffs above without bothering the Georgian streets. Walk out along the West Pier past the lighthouse, look back across the inner harbour at low evening light catching the stone of the Clock House, and the Royal Harbour does what its title is supposed to do - it earns it.