Scan the bay for sea duck in winter. This leads around part of the estuary upstream of the bridge, and gives good views of waders and wildfowl. A path from this car park leads to a hide giving good views over the estuary. Park in the beach car park and scan from here, or walk north along the beach. The estuary can hold up to 1,500 Wigeon in winter, along with smaller numbers of other wildfowl species such as Greylag and Canada Geese, Teal and Mallard.
Waders are also present in good numbers.
Harlech beach can hold good numbers of Slavonian Grebe, with a possibility of Black-necked Grebe. An extensive area of sand and mud extending along the Menai Straits from Bangor to Llanfairfechan, part in Conwy and part in Gwynedd. Most of the area is now a series of nature reserves. Access is possible at several points. There is a hide here, and you can follow the path in either direction along the shore.