Heolgerrig Rainfall ForecastUnited KingdomWLMerthyr TydfilHeolgerrigToday 2 Oct85%Sat 3 Oct40%Sun 4 Oct55%Mon 5 Oct45%Tue 6 Oct45%Wed 7 Oct5%Thu 8 Oct20%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Heolgerrig rainfall forecast issued today at 7:11 am. Next forecast at approx. 9:11 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads