Cwmtaf Rainfall ForecastUnited KingdomWLMerthyr TydfilCwmtafToday 4 Sep90%Fri 5 Sep20%Sat 6 Sep50%Sun 7 Sep85%Mon 8 Sep65%Tue 9 Sep70%Wed 10 Sep55%Cwmtaf rainfall forecast issued today at 1:38 pm. Next forecast at approx. 3:38 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