I'm one that is not a big fan of Windy, but it does give a general idea of what's going to be. I find the forecasting fair at best, especially wind and waves (and that's what we need).
Local CURRENT weather is hard to beat, as are the Bouy reports. You're getting weather that's happening right now and that's accurate. Also looking at what the weather was a few or several hours earlier can somewhat give an idea of the future.
Couple that with NOAA forecasts and you can get a pretty good idea of the future weather.
I like:
https://graphical.weather.gov/sectors/florida.php#tabs
Can zoom in/out, select marine and get reasonably good info.
Also:
https://digital.weather.gov/?zoom=6...layers=00BTFFTT®ion=0&element=0&mxmz=false
click on a location, give waves and good marine info, and reasonably accurate for forecasts.
For apps,
I just use the Weather Channel. Has local weather, forecasts, radar and works reasonably well.
I also have a few aviation apps and web sites, and get the airport current and forecast wx. Weather patterns, highs, lows, fronts, etc.
For ICW travels there's only a few things needed:
Frontal wx (and big pressure differences) that will cause high winds that I'd want to be secure for.
Also the above and winds that will cause high waves for crossings.
And Fog.
The above are the show stoppers and require some planning and thinking about. Knowing where to anchor/marina, etc.
And just for info, the local wx and forecast, temp, rain, etc., to plan the cruise and deal with, but not necessarily show stoppers.