Ystradffin Rainfall ForecastUnited KingdomWLCarmarthenshireYstradffinToday 21 May40%Thu 22 May5%Fri 23 May55%Sat 24 May85%Sun 25 May40%Mon 26 May40%Ystradffin rainfall forecast issued today at 1:37 am. Next forecast at approx. 3:37 pm.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