This is our home port so we don't really treat it as visitors. It's a sheltered anchorage but rather crowded with moorings. If you check at the Portchester sailing club you may be allocated an empty mooring or pile berth. The club is friendly and a great value meal can often be found there.
The club pier and slipway are visible at the top left corner of the castle.
Portchester castle is the most complete Roman fort in the country and really should be visited if you sail in the Solent.
Here are descriptions of some lunchtime visits, by boat, to various hostelries in Portsmouth harbour described by a friend who has a penchant for exploration...