Heolgerrig Rainfall ForecastUnited KingdomWLMerthyr TydfilHeolgerrigToday 28 Aug90%Sat 29 Aug95%Sun 30 Aug75%Mon 31 Aug45%Tue 1 Sep55%Wed 2 Sep80%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Heolgerrig rainfall forecast issued yesterday at 7:08 pm. Next forecast at approx. 9:08 am. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads