Measuring water temperature in middle slough of Sam Charley Island No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip Martin Jeffries measures the water temperature. The water was 0.3 degrees Celsius. The temperature reading in the gravel was 0.7 degrees Celsius. Process Observed: Open WaterScientific Measurements Date Process Observed: Thursday, February 2, 2006 Galleries: Midway down the middle slough of Sam Charley Island Gallery