I've posted these sargassum forecast sites before, both links seem to still work:

https://optics.marine.usf.edu/projects/SaWS.html

https://meteofrance.gp/fr/sargasses/iles-du-nord

Looks like the forecast is for lots of it to wash up onto the coastline of SXM, at least over the next few weeks...

Re hurricane season, it appears it might move the mats around but I doubt it is possible to predict where with any confidence.

Dave.