Porthor Oer Swell ForecastUnited KingdomWLGwyneddPorthor Oer1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIPorthor Oer swell forecast issued today at 12:51 pm. Next forecast at approx. 12:51 pm. Wave Height Sea TemperatureGet WillyWeather+ to remove ads