Forecasters say Kenneth is weakening rapidly and has been downgraded to a tropical storm in the eastern Pacific.
There is no threat to land from what had been the strongest late-season hurricane in that area on record when it earlier reached Category 4 status.
The U.S. National Hurricane Center in Miami said Thursday that Kenneth has maximum sustained winds near 60 mph (95 kph). The storm was centered about 945 miles (1,525 kilometers) southwest of the southern tip of Baja California, Mexico.
It is moving west-northwest at 10 mph (17 kph)
Kenneth is expected to weaken further. There are no coastal watches or warnings in effect.
The eastern Pacific hurricane season ends Nov. 30.