Porth Llawenan Swell ForecastUnited KingdomWLGwyneddPorth Llawenan1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIPorth Llawenan swell forecast issued today at 11:50 am. Next forecast at approx. 11:50 am.Get WillyWeather+ to remove ads