Best Castles Near Southampton
Written by UK Hidden Gems Editorial
Updated 5 August 2026
The best castles near Southampton are Portchester Castle, Wolvesey Castle, Carisbrooke Castle, King John's Castle, Ludgershall Castle & Cross, Donnington Castle and Corfe Castle.
Southampton sits on the Hampshire coast, ringed by castles from Roman shore forts to Norman keeps and Civil War ruins, with the Isle of Wight and the Dorset and Berkshire borders within a drive. Nearest, the Roman walls of Portchester enclose a Norman keep on their spur into Portsmouth Harbour, and the bishops' palace ruin of Wolvesey sits in the corner of walled Winchester.
Across the Solent on the Isle of Wight, Carisbrooke keeps its donkey-powered well and its memories of the captive Charles the First. North and west lie a run of ruins: the octagonal keep of King John's Castle by the Basingstoke Canal, the earthworks and gatehouse of Ludgershall in Wiltshire, and the tall lone gatehouse of Donnington near Newbury.
Furthest off, the shattered hilltop drama of Corfe Castle guards its gap in the Purbeck ridge. Some are great walled fortresses, others quiet green ruins.
Here are seven castles to seek out near Southampton.
Portchester Castle
Photo: Keith Havercroft via Geograph.org.uk
Portchester Castle stands on a spur of land reaching into Portsmouth Harbour in Hampshire, a Roman shore fort with a Norman castle built into one corner and a medieval church within the outer walls. The Roman walls, among the best preserved in northern Europe, still run almost the whole way round, enclosing a wide green, and the tall Norman keep can be climbed for views over the harbour and the Solent.
It has served many roles over its long life, including a prison for prisoners of war in the Napoleonic Wars. English Heritage looks after it, and it is open to visitors.
Wolvesey Castle
Photo: Peter Trimming via Geograph.org.uk
Wolvesey Castle is the ruin of the medieval bishops' palace of Winchester, tucked into the southeast corner of the walled city beside the cathedral. Despite the name it was mainly a grand twelfth-century residence, one of the greatest bishops' houses in England, built up largely by Bishop Henry of Blois.
Visitors walk among the standing walls and foundations of the great halls, courtyards and a latrine block, all free and open. The later seventeenth-century bishop's house next door is a separate private residence.
English Heritage looks after the ruins.
Carisbrooke Castle
Photo: Michael Garlick via Geograph.org.uk
Carisbrooke Castle In the well house a donkey plods a great wooden treadwheel, hauling water up a shaft that plunges some 161 feet, and it remains the thing most visitors remember. The castle crowns a hill above Newport on the Isle of Wight, its stone curtain walls and twin-towered gatehouse reached over a bridge across a dry moat.
Grassy earthwork bastions wrap the medieval walls, and you can climb up to walk the whole circuit. Its darkest chapter belongs to Charles I, held prisoner here through 1647 and 1648 before his trial, and that captivity is the story the place tells best.
King John's Castle
Photo: Mr Ignavy via Geograph.org.uk
King John's Castle, also called Odiham Castle, is a ruin standing by the Basingstoke Canal in the countryside near Odiham in Hampshire. It was built for King John in the early 1200s, one of only a handful of castles he raised, and is unusual for its eight-sided keep, part of which still stands among the earthworks and moat.
From here the king is said to have ridden out toward Runnymede to seal Magna Carta. The canal was later cut through the corner of the old bailey, and the site is open and free.
Ludgershall Castle & Cross
Photo: Stefan Czapski via Geograph.org.uk
Ludgershall Castle survives as a set of large grassed earthworks, steep banks and ditches with a few standing fragments of a flint tower, on the edge of the town of Ludgershall in Wiltshire. It began as a Norman motte-and-bailey and grew in the thirteenth century into a royal hunting lodge used by King John and Henry the Third, before falling into decline and being pulled down by the 1540s.
The site is open freely as a quiet green space. A short distance away in the village stands the Cross, a late medieval market cross.
Both are in the care of English Heritage.
Donnington Castle
Photo: Oscar Taylor via Geograph.org.uk
Donnington Castle stands on a hill just north of Newbury in Berkshire, where its tall twin-towered gatehouse survives almost whole while the rest of the castle is reduced to low footings. It was built in the fourteenth century, and held for the king through a long siege in the Civil War.
Around the gatehouse you can still trace the star-shaped earthwork gun defences thrown up by the defenders. The site is open and free, on grassy ground with wide views, an easy and atmospheric stop.
Corfe Castle
Photo: Jim Champion via Geograph.org.uk
Corfe Castle Gunpowder gave this castle its jagged silhouette. Lady Mary Bankes held it for the king, but it finally fell to Parliament and was blown apart in 1646, the explosions leaving towers tilted at drunken angles and walls torn open, exactly as you find them now.
The ruins crown a steep hill that plugs a natural gap in Dorset's Purbeck ridge, rising straight above the village that took its name. The National Trust cares for what stands, and from the shattered walls the eye ranges out across the surrounding country.
Few ruins wear their history quite so plainly.
FAQs
Which castles near Southampton are free to visit?
Wolvesey in Winchester, King John's Castle by the Basingstoke Canal, Ludgershall in Wiltshire and Donnington near Newbury are the free and open castle ruins near Southampton. Portchester, Carisbrooke and Corfe charge admission, run by English Heritage and the National Trust, but reward it with walls to climb and fuller stories to explore.
What can you see at Portchester Castle near Southampton?
At Portchester Castle near Southampton you can walk almost complete Roman walls and climb a Norman keep over Portsmouth Harbour, which makes it a full day out. Carisbrooke on the Isle of Wight adds its donkey-powered well, climbable bastions and the story of Charles the First, and Corfe Castle's dramatic hilltop ruin makes another memorable visit.
Which castles near Southampton have an unusual feature or story?
Carisbrooke's well house near Southampton still uses a donkey walking a treadwheel to raise water, and King John's Castle has a rare eight-sided keep tied to the ride to seal Magna Carta. Corfe was slighted with gunpowder in 1646, leaving its towers leaning at broken angles, and Portchester served as a Napoleonic prison.
Conclusion
Southampton sits on the Hampshire coast, ringed by castles from Roman shore forts to Norman keeps and Civil War ruins. Nearest, the Roman walls of Portchester enclose a Norman keep on their harbour spur, and the bishops' palace ruin of Wolvesey sits in walled Winchester.
Across the Solent, Carisbrooke keeps its donkey well and its memories of Charles the First. North and west lie the octagonal keep of King John's Castle, the earthworks of Ludgershall, and the lone gatehouse of Donnington near Newbury, with the shattered drama of Corfe Castle guarding its Purbeck gap furthest off.
From a Roman-walled fortress to a gunpowder-blasted ruin, these are the castles to seek out near Southampton.
