Tropical Storm Colin lost some strength overnight, with its maximum sustained winds reaching only 45 mph Friday morning, the National Hurricane Center said in its late-morning update.
Forecasters said the storm is likely to regain some strength later in the day and Saturday.
Colin was "meandering" east-northeast at 7 mph Friday, the hurricane center said. Forecasters predicted the storm would veer northward later Friday, bringing the center just west of Bermuda on Saturday or Saturday night. However, even a slight deviation to the east of the forecast track could bring Colin's center directly over Bermuda, warned the hurricane center.
A tropical storm warning is in effect for the British island territory 380 miles north-northeast of the storm, meaning tropical-storm-force winds of 39 to 73 mph are expected in the next 36 hours.
The storm is not forecast to make landfall in the United States.