Is Portchester Castle really haunted

Hi, mauricerbunyan!

It could very well be. But, oftentimes whether a place is haunted or not, is often a matter of how people interpret what is or has occurred.

Have you tried the following search?

Portchester Castle Hauntings - Google Search (http://www.google.com/search?hl=en&safe=off&q=Portchester+Castle+Hauntings)

Thanks!