MIAMI (AP) — Bermuda has issued a tropical storm watch as Hurricane Bertha approaches.

Forecasters say tropical storm conditions are possible in the area by late Saturday night. Bertha has already been producing large swells and high surf there, and that's expected to continue over the next few days.

As of about 11 a.m. EDT Friday, Bertha's center was about 310 miles south-southeast of Bermuda.

The Atlantic season's first hurricane has maximum sustained winds of about 85 mph with some higher gusting. It's traveling northwest at about 6 mph and is expected to turn north in the next 24 hours. It could be close to the island by Saturday.

Forecasters says the strength of the Category 1 storm could fluctuate in the next couple of days.