Hello, I will be visiting Granada first week of October and plan to visit the Alhambra on a weekday. What is a good time to go in order to avoid crowds and group tours, first thing in the morning or later in the afternoon? This includes visiting Nasrid Palaces. We have the option of visiting them in the morning (9am through 11am) or later in the day/evening.
Depends whether you want to see the grounds towards sunset.
Personally, I'd go earlier to miss (some of) the crowds.
As stated above, tour groups tend to visit during the morning hours. The last time we visited we stayed at a hotel right at the complex and had an early afternoon entrance time.
While still crowded there were no tour groups with the leader carrying those annoying flags or signs and the group members blocking everything because they are oblivious to the fact that others not on a tour want to see the same sites.