Garth (Porthmadog) Wind ForecastUnited KingdomWLGwyneddGarth (Porthmadog)1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Garth (Porthmadog) wind forecast issued today at 7:09 am. Next forecast at approx. 7:09 pm. Wind Speed Wind GustGarth (Porthmadog) Wind Statistics August WindCapel Curig Saws (23km)2026JulyAugustStrongest 1 August, 20268.9mph SWAverage August2.2mphStrongest 1 July, 202638mph SWAverage July9.7mphStrongest 12 January, 202651.4mph SWAverage 202612.5mphClimate (2021–2026)Capel Curig Saws (23km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 21 January, 202458.2mph SWAverage 2021–202612.3mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average August27.5%15%2.5%CalmGaleAugust Wind RoseAugust (5 Year Average)5 Year Average Annual5 Year Average August32.5%17.5%2.5%CalmGaleGet WillyWeather+ to remove ads