Porthmadog Rainfall ForecastUnited KingdomWLGwyneddPorthmadogToday 2 Jun90%Wed 3 Jun95%Thu 4 Jun90%Fri 5 Jun25%Sat 6 Jun55%Sun 7 Jun50%Mon 8 Jun50%Porthmadog rainfall forecast issued today at 1:38 pm. Next forecast at approx. 3:38 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