Porthmadog Rainfall ForecastUnited KingdomWLGwyneddPorthmadogToday 10 Jan90%Sun 11 Jan95%Mon 12 Jan70%Tue 13 Jan35%Wed 14 Jan75%Thu 15 Jan55%Fri 16 Jan35%Porthmadog rainfall forecast issued today at 6:37 pm. Next forecast at approx. 8:37 am.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