average ocean temperature
August 31, 2001. The average temperature of the ocean surface water is about 17 Â°C (62.6 F).. 17 Â°C. So even though surface waters can be a comfortable 20 degrees Celsius (good for swimming in!), the majority of our ocean water has a temperature between 0-3 degrees Celsius (32-37.5 degrees Fahrenheit)..0-3 Â°C.ecordings have shown that the average temperature of water ranges from 0-3 degrees Celsius (32â37.5 degrees Fahrenheit). Back in 1899 it was estimated that 92% of the ocean floor had a temperature of lower than 40 degrees Fahrenheit.