The tides within Weymouth Bay are generally weak and entry into the harbour is pretty straight forward. There's no fairway buoy or buoyed channel, and the entry itself is simply the channel between the two piers, but be aware of the large Condor ferries. Take note of the IPTS signals about half way along the South Pier - if in doubt call ‘Weymouth harbour’ on VHF Ch12. There is also a rowing ferry, which has right of way, and runs between the Weymouth SC and the Customs House Quay.
By night, the approach to the harbour is assisted by a pair of red flashing leading lights on bearing 239° located about half a cable east of the Weymouth SC.
The Lifting bridge opens every two hours on the hour from 8am to 8pm (9pm June to Aug) and the min air draft is 10.5ft. There are waiting pontoons either side of the bridge and at least 5 mins before a scheduled opening time, you need to be listening on VHF Ch12.