In general, the surface waters of the ocean are warmer than the deep waters. This is because the sun's energy is absorbed by the water near the surface, and the heat is then distributed throughout the water column by currents and waves. The average temperature of the surface waters of the ocean is around 26°C (78.8°F).
However, there are some areas of the ocean where the surface waters can be much warmer, such as the tropics, where the average surface water temperature is around 30°C (86°F). In contrast, the surface waters of the polar oceans can be much colder, with average temperatures below 0°C (32°F).
The time of year also has an impact on sea temperatures. In general, the surface waters of the ocean are warmest in the summer and coldest in the winter. This is because the sun's energy is more concentrated during the summer months, so it has a greater impact on the temperature of the water.
Finally, the depth of the water can also affect the temperature. The deeper the water, the colder it is. This is because the water near the surface absorbs heat from the sun, while the water at depth does not. As a result, the temperature of the water decreases as you go deeper into the ocean.