What is the water temperature in the open ocean?
The temperature of the surface ocean depends on your location. In the tropics, the surface ocean temperature is 20-25°C all year long. In temperate climates, like Rhode Island, the surface water temperature can be 20°C in the summer and 5°C in the winter. Polar regions have colder water temperatures. The summer temperature can be around 10°C and the winter temperature can be below 0°C. In general, Narragansett Bay is warmer than the open ocean in the summer and winter.
The deep ocean is much colder than most of the surface ocean. Water below 2 kilometers depth is at a temperature of 2-4°C. The temperature of the deep ocean is the same all the time.
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