Fort Nelson Portsmouth

A view of the fort from the air highlighting it's pentagonal shape and the fields that surround it

With over 19 acres of tunnels, ramparts and artillery to explore, Fort Nelson is a space where imaginations can run wild.

Overlooking Portsmouth Harbour, this restored Victorian fortress is packed with artillery from across the world. Highlights include a 15th-century Turkish bombard cannon, a gigantic 200-tonne railway howitzer, and the infamous ‘Big Babylon’ Iraqi supergun.

There’s plenty for all ages to enjoy, including free family activities, an onsite café and regularly changing exhibitions.

Book Tickets

Free Entry

Opening Times

School Holiday: 14 February to 22 February
Open daily
10am to 4pm

Term-time: 24 February to 27 March
Open Tuesday to Sunday
10am to 4pm
(Open until 5pm from 24 March)

Getting Here

Portsdown Hill Road,
Portsmouth
PO17 6AN
United Kingdom

Plan Your Visit

Having a pre-booked ticket is the only way to guarantee entry to Fort Nelson during February half term (16 to 20 February).

We are advising visitors not to travel to Fort Nelson without a pre-booked ticket during this period.

Visitor capacity, based on no shows, will be assessed daily from 12pm. Any newly available tickets will be released on site on a first-come first served basis after this time. We cannot guarantee admission without a booked ticket.

Fort Nelson is free to enter.

Book Tickets for 27 January to 29 March 2026

Young people aged 15 and under must be accompanied by a responsible adult at all times.

More information on visitor behaviour and guidance.

Royal Armouries Members can park for free at the onsite car park, non-Members can pay for parking on arrival.