Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 30 Oct95%Fri 31 Oct85%Sat 1 Nov35%Sun 2 Nov60%Mon 3 Nov85%Tue 4 Nov80%Garth (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