How cold is the bottom of the ocean?

The temperature at the bottom of the ocean varies depending on the location but generally ranges from about -2 to 4 degrees Celsius (28 to 39 degrees Fahrenheit). In deep ocean regions, like the abyssal plains, temperatures are typically near freezing, while near hydrothermal vents, temperatures can be significantly higher due to geothermal activity. Overall, the deep ocean remains cold and dark, with little variation in temperature compared to surface waters.