The storm is behind Hurricane Katia which is turning to the north and is not expected to hit the U.S mainland.
Maria - currently in the western Atlantic - is the 13th named storm of this year's hurricane season.
It's on a more southerly track than Katia, which is a concern for forecasters.
The U.S. National Hurricane Center in Miami said Wednesday the storm is about 1,220 miles west of the Cape Verde Islands and moving west at 23 miles per hour.
It has top sustained winds of 50 mph and some slight strengthening is possible in the next 48 hours.
Katia continues to blow as a Category 1 storm. It is forecast to pass between the U.S. East Coast and Bermuda over Wednesday night and Thursday.