In winter you can fish the Harbour side of the pier, wrasse, pout, dogfish and pollack are fairly abundant after dark along with whiting in winter and the occasional bass. Float fishing is popular during the summer for mackerel and garfish. Do look out for boat traffic and reel your lines in out of their way, long casting is not really required as the fish may be directly under you.
This is one of a few venues in the UK where you can catch squid from the shore, not the little calamari squid, but half metre long squid that make good eating ( I cannot say how good as, thankfully, I have never been so hungry as to try to eat one.) The squid usually arrive in late September to early November.
There is a café that opens in the summer season in the ferry building but apart from that there are no facilities nearby. The nearest tackle shop is near the Town Bridge. Car parking is on the pier complex by the ferry terminal, (pay and display free after 6pm) you can fish from the sea wall at the car park and around behind the Tower, the water is fairly shallow here but a variety of species can be caught. Gilthead bream have put in an appearance in recent years and tub gurnard can sometimes be caught by setting a float to drag the strip of mackerel bait along or near the sea bed. Mackerel can be caught at night here on occasions, the shoals will be on the surface and can be caught with a float set very shallow.... if the wind is from behind you then the float and weight can be dispensed with and the bait 'freelined' on the surface. The mackerel are taking advantage of the light from the high floodlights in the car park.