At the swimming pool take the quiet road called King George V Memorial Walk which follows the edge of Copperhouse Creek. You can walk along the road or on the footpath through the gardens, either way you get great views over the estuary. In winter there can be many thousands of birds in this part of the estuary but avoid high tide when the mud is all covered by water. Look for wigeon, teal, Canada goose, curlew, redshank, grey plover, dunlin, bar-tailed godwit, lapwing, golden plover, little egret, grey heron, rarer birds might include spoonbill. Take special care to look for kingfishers especially around the two bridges over the weir near the swimming pool and again near the Black Bridge at the far end of the creek.
You can extend your visit either by walking to Asda and then exploring Carnsew Pool where you might find more grebes (sometimes including black-necked) and maybe divers, most often great northern divers (especially after stormy weather). If you want to drive, try parking at the RSPB reserve car park and there you can visit the hide and walk to The Causeway. Timing is important here. Try to get to The Causeway a couple of hours before high tide and wait for the tide to push the birds closer, then walk back to the hide at high tide.