Porthmadog Rainfall ForecastUnited KingdomWLGwyneddPorthmadogToday 25 Nov10%Wed 26 Nov80%Thu 27 Nov80%Fri 28 Nov55%Sat 29 Nov40%Sun 30 Nov50%Porthmadog rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 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