Hello guys, I did a little research looking into wind RNG for golf to see how it is determined and here are all my findings.

ALL wind RNG for the round is determined as soon as you click the course you are playing.

Wind Speed

There are 11 possible values for wind speed ranging from 0mph to 20mph in increments of 2 (or 0m/s to 10m/s in increments of 1 on PAL, just divided by 2, no difference). You can also see 22mph to 30mph wind on Resort C, Classic C, and Special.

For the 18 Hole course, 9 of the 11 wind speeds are selected for the front 9, and once again for the back 9. It is possible to not have two certain wind speeds at all during your run (eg, never see 2mph and 16mph).

Wind Direction

There are 8 possible values for wind direction corresponding to all of the combinations of the cardinal directions (N, S, E, W). Even when you have 0 wind speed, you can still find which direction the wind is heading by observing the flag on the hole.

For the 18 Hole course, wind direction is randomly selected in 3 cycles. The first cycle includes Hole 1 to Hole 8, where you will see each wind direction once. The second cycle includes Hole 9 to Hole 16, where again you will see each direction once. The third cycle includes Hole 17 and 18, where you will see two different directions.

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I haven't thoroughly checked the 9 Hole and 3 Hole courses, but it is safe to assume winds are chosen in a similar manner.

Overall, wind is NOT completely random, it is designed to be balanced.

Knowing the determination of winds isn't very useful for speedrunning, but it does allow you to be sure you will not see a wind speed twice in the front/back 9, and if you are paying attention to wind direction, it allows you to know the exact direction you will receive on Hole 8 and Hole 16. Unfortunately, it can be hard to determine wind direction during 0 wind which could prevent you from keeping track of selected directions.

A google sheets where I collected data and have the information neatly presented can be found here: https://docs.google.com/spreadsheets/d/1q5GSL6iyJiYkj1DkAwBBNEj2eoRcaJ0cbSZBguvPQtQ/edit?usp=sharing