FPUS41 KOKX 250856 City Forecast for Westhampton Beach, NY Issued Wednesday morning - Nov 25, 2009 .Wednesday... Mostly cloudy, high 53, 50% chance of precipitation. .Wednesday night... Low 41, 50% chance of precipitation. .Thursday... Cloudy, high 55, 50% chance of precipitation. .Thursday night... Low 41. .Friday... High 51.