at ~9km resolution they may be accurate but I doubt you can plan things down to the minute or even have any certainty of what weather conditions to expect near

at ~9km resolution they may be accurate but I doubt you can plan things down to the minute or even have any certainty of what weather conditions to expect near shore where terrain will greatly affect the flow of 10m winds. also Windy only works over a strong network connection so during actual passages it isn't really that helpful (compared wx gribs which can typically be downloaded over ham radio) All that being said, Windy is an amazing product, and definitely a boon for visualizing model data and making that accessible to anyone with a decent internet connection! source: thousands of miles of single-handed ocean sailing and I also handle wx model data daily at my job.