Mānana Island State Seabird Sanctuary Swell ForecastUnited StatesHIHonoluluMānana Island State Seabird Sanctuary1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIMānana Island State Seabird Sanctuary swell forecast issued yesterday at 7:47 pm. Next forecast at approx. 7:47 pm.Get WillyWeather+ to remove ads