Yes, SXM has had it's more than fair share of seaweed this year, as several have reported here. The standard places like French Cul de Sac and Dawn Beach, have often been inundated. Orient Beach it kind of comes and goes. Simpson Bay Beach has had some, depending on where you are on Simpson Bay. Mullet, Bay Rouge, Plum, Happy Bay, Friar's Bay, seem to be relatively untouched.
The windward side of the island will always have more than the leeward side. Prevailing winds and currents move it around. Was very bad in Cul de Sac this last may and June. Some days the ferry couldn't operate from the dock to transport people to Pinel. And the stench is just horrible.
We were there 7/10 thru 7/17 and visited the following beaches: Simpson Bay, Mullet, Baie Rouge, Great Bay and Orient. All were clear of seaweed except Orient had patches coming in.