Clarence Pier

A great place for arcade games and a fun fair for kids and big kids. There is plenty to do. You will need to bring a lot of money with you. There are plenty of rides to go on.
The funniest one is the Ghost Ride! It located near Pirate Petes and Wimpy. There is a lot of fun to be had. It does look outdated through!

Clarence pier has the usual assortment of amusments and stalls selling postcards and novelty items as well as a number of almost identical fast food kiosks.
Sometimes you can see people fishing by the pier.
There is a crazy golf course which for some reason (probably the big skull) reminds me of the goonies. It is a good course as you can choose one of two routes through it. That means if someone in front looks like they will take an age to complete each hole you can easily choose the other route.
There is plenty of car parking nearby — all along the seafront, by the pub and some public car parks by the common. You’ll probably still be stuck in the Summer though so your best bet might be to park in Old Portsmouth and walk along the seafront from the direction of Gunwharf.
There is also a token based funfair next to the pier.