Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 16 Mar90%Tue 17 Mar15%Wed 18 Mar15%Thu 19 Mar5%Fri 20 Mar5%Sat 21 MarNo RainGarth (Porthmadog) rainfall forecast issued today at 12:36 am. Next forecast at approx. 2:36 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