Black Rock Sands Porthmadog Wind ForecastUnited KingdomWLGwyneddBlack Rock Sands Porthmadog1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met Office Swell Height and Direction Forecast NOAA WaveWatch IIIWind Real-Time Black Rock Sands Porthmadog wind forecast issued yesterday at 7:10 pm. Next forecast at approx. 7:10 am.Black Rock Sands Porthmadog Wind Statistics August WindCapel Curig Saws (26km)2025JulyAugustStrongest 4 August, 202544.7mph SWAverage August9.8mphStrongest 4 July, 202535.8mph SWAverage July8.9mphStrongest 24 January, 202553.7mph SWAverage 202510.9mphClimate (2011–Present)Capel Curig Saws (26km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 21 January, 202458.2mph SWAverage 2020–202512.1mphWind 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