Southsea Castle

A 16th-century coastal fort built by Henry VIII in 1544 to defend Portsmouth Harbor, featuring Tudor architecture and coastal defence exhibitions. The castle offers views across Southsea Common to the sea and houses displays about coastal artillery and the English Civil War siege of Portsmouth. It sits below the headline sights but earns its place on a longer visit to Portsmouth, especially paired with nearby Blue Reef Aquarium. Tickets cost £5 adult, £3 child, free for Portsmouth residents with proof and 1-2 hours is enough to see everything without rushing.

Priority: Medium - include with 2+ days Time needed: 1-2 hours Best for: one of henry viii's coastal forts still standing Skip if: You've already seen Portsmouth's naval history at the Historic Dockyard and want variety Cost: £5 adult, £3 child, free for Portsmouth residents with proof

You enter through a Tudor gatehouse into a compact stone courtyard surrounded by thick walls. Climbing to the ramparts gives you views across the Solent while exploring the interior reveals vaulted chambers housing cannons, muskets, and displays about siege warfare.

Accessibility: Ground level accessible, ramparts require steps, some assistance available for wheelchair users in courtyard areas

One of Henry VIII's coastal forts still standing in its original location with authentic Tudor defensive features. It is not the first thing you should see in Portsmouth, but with two or more days it fills a gap the major sights leave. It pairs naturally with Blue Reef Aquarium and D Day Museum And Overlord Embroidery - together they fill a solid half-day. Mornings are quieter if you want to take your time.

Skip if: You've already seen Portsmouth's naval history at the Historic Dockyard and want variety

• Walk the ramparts for sea views and photo opportunities.
• Look for the Tudor rose carved into stonework.
• Combine with exploring Southsea Common and the seafront.

Insider tip: The castle's position was chosen so its guns could crossfire with those at Gosport's Fort Blockhouse across the harbour entrance

Good exterior shots from Southsea Common, distinctive interior stone chambers, sunset photos possible from western ramparts