Giant's Causeway Swell ForecastUnited KingdomNIMoyleGiant's Causeway1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIGiant's Causeway swell forecast issued today at 6:51 pm. Next forecast at approx. 6:51 pm. Wave Height Sea TemperatureGet WillyWeather+ to remove ads