Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 1 May90%Sat 2 May55%Sun 3 May45%Mon 4 May10%Tue 5 May10%Wed 6 May15%Thu 7 May15%Garth (Porthmadog) rainfall forecast issued today at 7:37 am. Next forecast at approx. 9:37 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