Ouse Angling Preservation Society offers Coarse fishing on most of the Sussex Ouse downstream of the Anchor Inn (north of Barcombe Mills) as far as the downstream end of the Hamsey Cut about a mile and a half north of Lewes, a distance of approximately six miles.
There is, in addition, fishing on the Bevern Stream from its confluence with the Ouse upstream to a point about a quarter of a mile upstream of Clappers Bridge at Barcombe Cross.
The fishing is mainly single bank with the river being tidal as far upstream as Barcombe Mills. The area inside the circle of roads comprising the main Barcombe Mills Road where the road bridge is and the Old Toll Road which overlooks the Mill Pool is reserved for Sea Trout fishing during the season from 01 May to 31 October. From 01 November to 14 March this area is available for fishing by Coarse fishing annual and winter permit holders.
The river contains all of the main Coarse species found in the United Kingdom.
Carp and Pike in excess of 30lb (32lb pike from Barcombe Mills below) are caught regularly.
Barbel are caught, occasionally into double figures.
Large shoals of good sized Bream are present throughout the river, Perch in excess of 3lb, Roach and Rudd to over 1.5lb, Chub of 6lb+, Tench on both the tidal and non-tidal river and, from time to time, we see good Koi Carp and Grass Carp caught
Smaller ‘silver fish’ such as Dace are also present in numbers.
The river is also used for spawning by a number of sea fish such as Sea Lamprey, Shad and Flounder and has a resident population of Grey Mullet each summer which can be found anywhere from upstream of Hamsey Weir as far as the tidal limit at Barcombe Mills (Mullet can be seen easily through the summer in Lewes from the Phoenix Causeway and Cliffe Bridge.)