Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 27 Jul50%Mon 28 Jul50%Tue 29 Jul55%Wed 30 Jul15%Thu 31 Jul30%Fri 1 Aug10%Garth (Porthmadog) rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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