Cwmtaf Rainfall ForecastUnited KingdomWLMerthyr TydfilCwmtafToday 15 Sep60%Tue 16 Sep95%Wed 17 Sep95%Thu 18 Sep85%Fri 19 Sep80%Sat 20 Sep50%Sun 21 Sep30%Cwmtaf rainfall forecast issued today at 7:38 pm. Next forecast at approx. 9:38 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