Rock Island Swell ForecastUnited StatesCTNew London CountyRock Island1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIRock Island swell forecast issued today at 7:48 pm. Next forecast at approx. 7:48 pm.Get WillyWeather+ to remove ads