Black Rock Harbor Number One Light Swell ForecastUnited StatesCTFairfield CountyBlack Rock Harbor Number One 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 One Light swell forecast issued yesterday at 7:48 pm. Next forecast at approx. 7:48 pm.Get WillyWeather+ to remove ads