Another off the North Carolina coast recorded 10-foot waves.
Temperatures will drop slightly overnight to around 14C, so it will still be fairly mild night for the start of Autumn.
New tropical storm formation is not expected anywhere in the Atlantic Basin through Tuesday.
But The Weather Company, the world's biggest commercial forecaster, warned that 13 have already been used this year and the other eight are likely to be rapidly used up.
Despite the fact that Maria is weakening, it remains a large storm.
"The worst case would be strong winds and heavy rain".
Leon Brown, head of meteorological operations at The Weather Channel, owned by The Weather Company, said: "Maria looks like being caught in the jet stream and swinging towards the United Kingdom as a deep depression".
Tropics remain active with two named storms churning in the Atlantic. "We have buried in excess of 15 people", he said. Fallen trees and power poles will isolate residential areas.
Earlier in the week, Maria became the strongest landfalling hurricane in Puerto Rico since 1928.
Some of the U.S. coast may be under a tropical storm or hurricane watch later Sunday, the center said.
However, it's important to remember monitoring of hurricanes was much more hard prior to the advent of weather satellites in the late 1960s when storms may have been missed. It has the potential to intensify to a hurricane and stay away from land. Swells also continue to affect Puerto Rico, the Virgin Islands, the northern coast of Hispaniola, the Turks and Caicos Islands, and the Bahamas.
Leon Brown added the stormy conditions will most likely arrive around the beginning of October, "but timing can yet change".
Hurricane Maria is located about 425 miles south-southeast of Cape Hatteras is moving north at 9 mph and will continue on this track the next several days with a slower forward speed expected.
Jose should lend a helping hand to keep Maria away from the USA mainland by temporarily blocking a large area of high pressure over the eastern US from moving farther east, the Weather Channel reported.
This will mean airflow will be travelling in from a warm southerly direction for most of the time to bring a mild end to September.
Ships plying the Eastern Seaboard have been warned of high winds and waves reaching as high as 28 feet within about 290 miles of the coast from DE to SC, according to the National Weather Service.