Weather forecasts are a wonderful thing, they can tell you if it will rain or be hot out, but they aren’t perfect. How many times do you see 50% chance of rain? That’s the same as saying: “it might rain today, but it might not”.
The problem with forecasts is they are being fed to a very large area and each individual area in the larger region might not actually have the same weather as the forecast. The best way to get your local weather is to figure it out yourself. This is not going to be a “broad forecast for a large area” but instead a “targeted local forecast for your immediate area”.
The best part about this method is that it doesn’t require you to have a connection. You know all those weather apps on your phone, if you don’t have internet access, you don’t have a forecast. When you head offshore, there is no signal and no reception. Your options are to either pay a lot of money to receive satellite internet or to produce your own weather forecast from your own observations.
All you really need to accurately determine what winds will come your way are a barometer and a weather eye.