Sparse winter visitor. Not recorded in June, August and September
Mathew (1984) stated that a few specimens occur every winter while Lockley et al. (1949) could add only six further records. Since the 1960s the Slavonian Grebe has become known as a regular winter visitor in small numbers. Records fall mainly between October and March but in some years one or two birds in summer plumage have stayed into April and May, with an isolated record of one in the Pembroke River on 30 July 1974. One or two occur right around the coast but it is most regularly seen in St Bride's Bay (up to four) and at Angle Bay (up to seven). It has occasionally been seen on fresh water at Trewellwell, Bosherston Pools, Llysyfran reservoir and Bicton.