WeatherTrack, the Swiss Army Knife for Weather Enthusiasts, offers another great tool: ROUTE WEATHER.
Should I go or should I stay...?
Plan your route with WeatherTrack, the universal iOS app.
Plot (or import/export) a route and enter your estimated speed. Then pull up the route meteogram to show the GRIB forecast along your entire route.
The meteogram shows the forecast for the weather at the matching waypoints and time along the route including a translation of the winds (true, relative, apparent) based on vessel heading and estimated speed. The meteogram can be updated with the ship's location, speed and the latest forecast as the passage progresses.
Enter different departure times, check the weather of your next coastal or offshore passage to find out what time suits best for leaving.
WeatherTrack is available here: https://itunes.apple.com/us/app/weathertrack/id417401887?mt=8&ls=1
