In 23 years of walking Orient from Mont Vernon to Club O and back, I (and my long-time neighbour agree) have never encountered such a difficult walk because or the sea-weed! It's heaped in many places up to three ridges high! My usual 45-minute quick walk took double time on Saturday and more sea-weed is floating off shore!
The Collective has a tractor cleaning from Mont Vernon toward the the big rock; it's there again this morning raking piles of the stuff, but it hasn't been able to proceed to the tennis courts (the ones that local school children use)! I keep using the exclamation point because that's how tough the problem seems.
As you pass the big rock from MV, the restaurants have just raked small paths through the stuff so their clients can enter the water.
A local here at MV reports that deforestation on the Amazon has caused the river temperature to rise which in turn has adjusted the ocean currents around the Sagasso Sea and directed the sea-weed here.