Real-time observations are from fixed locations. However, your sphere of interest is generally not limited to that fixed spot. Hence, you can take advantage of the point forecasts (a.k.a. Nowcast spots) to get the forecast for a particular location of interest!
The following are two examples of areas where the weather stations are very well located and accurately report what is experienced on the water, but where the computer model forecasts are poor versus what the model forecasts over the water.
NOTE: The map are modeled maps for wind flow NOT real-time wind maps.