My journey with weather mapping sites went in reverse order from this thread: Years ago when I ran a local weather blog I discovered the Nullschool site, then a few years later VentuSky, then Windy. I don't do the blog anymore but I still rely on Windy for visualizing weather conditions.

PredictWind has free tier that displays something like 6 forecasts on one screen, app or browser. Def my favourite software and it’s kiwi made!

Their premium tier is for automatic routing and can get expensive for budget sailors.

They will sell you an irridium go and distribute data through their own email client but you can get all of that through Sailmail and using the saildocs email GRIB service for less money with a lot more flexibility, also I’m not sure how good their support is for using something like PACTOR over HF which if you are a licensed HAM is always free.

This stuff really only applies to offshore or other low bandwidth connection use cases. When I have decent cell/internet it’s hard to beat windy’s UI.

Earth.nullschool is the original one.

There are a LOT of weather geeks around the world. Different folks, different origin stories.