Sea Mills railway station is on the Severn Beach Line and serves the district of Sea Mills and nearby Westbury on Trym in Bristol, England. It is from , situated at the confluence of the River Avon and River Trym and near the A4 Bristol Portway. Its three letter station code is SML. The station has a single platform which serves trains in both directions. it is managed by Great Western Railway, which is the third franchise to be responsible for the station since privatisation in 1997. They provide all train services at the station, mainly a train every forty minutes in each direction between and .