Daniel became the third Pacific hurricane of the season Friday when the storm's winds reached 75 mph, according to the National Hurricane Center.
At 8 p.m. Pacific time, the Category One storm was about 745 miles west of the southern tip of Baja California, the hurricane center said.
The storm was expected to strengthen Saturday as it moved to the west at 12 mph.
But it was expected to encounter colder water and weaken on Sunday, forecasters said.
The storm poses no current threat to land.