Police were called to clear the A259 between Climping and Yapton last night.
As windy and rainy conditions hit the area, the road became blocked by a fallen tree, according to police.
Traffic was reported to be slow and queuing along the A259.
Arun Police tweeted: "It's rather windy outside. We are currently working with @HighwaysSEAST to clear the road due to a tree falling down."
There were also reports of a fallen tree near Grevatts Lane.