Open all year
Walmer Castle and Gardens, North East of Dover, Kent.
Built by Henry VIII in the 1539 and smaller in size than Deal Castle. Open all year (Nov to March Wed - Sun, Jan & Feb weekend only) except when the Lord Warden is in residence.
Open all year
A Henry VIII circular fort built in 1539. Open all year.
Hever Castle, South-East of Edenbridge.
Rochester Castle, North of Maidstone.
Allington Castle, Maidstone
Camber Castle
Canterbury Castle
For more castles in Kent, take a look at VisitKent