Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 29 Jan55%Fri 30 Jan50%Sat 31 Jan20%Sun 1 Feb20%Mon 2 Feb45%Tue 3 Feb45%Wed 4 Feb10%Garth (Porthmadog) rainfall forecast issued today at 12:40 pm. Next forecast at approx. 2:40 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