Garth (Porthmadog) Rainfall ForecastUnited KingdomWLGwyneddGarth (Porthmadog)Today 2 Aug10%Mon 3 Aug50%Tue 4 Aug70%Wed 5 Aug50%Thu 6 Aug10%Fri 7 Aug35%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Garth (Porthmadog) rainfall forecast issued today at 7:08 am. Next forecast at approx. 9:08 pm. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads