Trallwn Rainfall ForecastUnited KingdomWLSwanseaTrallwnToday 1 Dec100%Tue 2 Dec80%Wed 3 Dec90%Thu 4 Dec30%Fri 5 Dec80%Sat 6 Dec40%Sun 7 Dec55%Trallwn rainfall forecast issued today at 6:36 pm. Next forecast at approx. 8:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Crug-y-Gorllwyn (Carmarthenshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads