Cwmtaf Rainfall ForecastUnited KingdomWLMerthyr TydfilCwmtafToday 2 Aug5%Mon 3 Aug40%Tue 4 Aug80%Wed 5 Aug50%Thu 6 Aug5%Fri 7 Aug25%Sat 8 Aug5%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Cwmtaf rainfall forecast issued today at 7:08 pm. Next forecast at approx. 9:08 am. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads