Ocean buoys measure a whole range of weather variables such as wave height, swell period and direction, wind speed and direction, air and water temperature, and barometric pressure. These heavy and colored weather stations are usually placed by national meteorological centers in open ocean. In the United States, the National Oceanic and Atmospheric Administration (NOAA) is the organization responsible for deploying weather buoys, operating and collecting data from each floating device.

Link:
How does an ocean buoy work?

forecast, models, national, noaa, oceanic, research, surfing, surfing today, system, united, Weather