Heol-ddu Rainfall ForecastUnited KingdomWLCarmarthenshireHeol-dduToday 23 Sep55%Thu 24 Sep15%Fri 25 Sep55%Sat 26 Sep10%Sun 27 Sep40%Mon 28 Sep15%Tue 29 Sep55%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Heol-ddu rainfall forecast issued today at 7:09 am. Next forecast at approx. 9:09 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads