Check out current sea conditions reported by ships navigating the oceans.
At any one time there are thousands of ships navigating the blue planet. A project by NOAA (National Oceanic & Atmospheric Administration), called the Voluntary Observation Ship (VOS) encourages commercial vessels to give weather reports as they cross the globe. Here you can view a dynamic KML showing weather reports in the placemark description balloons for the past 24 hours. Use the time slider at the top to scroll through to find those of interest.