Cow and Calf Swell ForecastUnited KingdomSWDevonCow and Calf1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIICow and Calf swell forecast issued yesterday at 11:51 pm. Next forecast at approx. 11:51 pm.Get WillyWeather+ to remove ads