Welcome aboard cruise2020.
Not knowing your location or where you will sail, the general source for overall historical wind
info would be pilot charts
. These are mostly for ocean winds (strength and direction). Here is a source: https://msi.nga.mil/Publications/APC
Another good source wind, wave and other info for "now time" or near the time of departure would be windy.com. Different weather
models to look at. It can show you the zoom out for an overview or if you zoom in and click on a highlighted city it will give you a lower popup to look at more advanced feature in that particular area. For example if I zoom in and put my cursor on Atlantic City (NJ), USA east coast) and click on it, a more detailed 5 day forecast
pops up. On the very bottom of the pop up portion, it may have "Basic" highlighted. If you move it to "Wind" it will show the general wind direction & speed for all models. If you move the time line, you can get a good idea what will happen in the next 5 days. Once in this screen
you can hone in on a different area by moving the cursor and left clicking it to that spot.
Play with it for a while, it fairly straight forward for things like wave direction, etc.