Black Rock Harbor Number Three Light Swell ForecastUnited StatesCTFairfield CountyBlack Rock Harbor Number Three Light1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIBlack Rock Harbor Number Three Light swell forecast issued today at 12:46 pm. Next forecast at approx. 12:46 pm.Get WillyWeather+ to remove ads