According to Mike Kobrick of NASA, here are the best times to see the International Space Station:
Friday: At about 9:56 p.m., if you can see the Big Dipper, follow the curve of the handle across the sky toward the south. The bright star you get to is Arcturus in the constellation Bootes. The station should rise in the southwest and be right under Arcturus moving right to left a few seconds before 10 p.m.
Saturday: Face north, and you should see the International Space Station rising a bit to your left by 8:59 p.m. After it moves right through the Little Dipper going left to right, it should pass quite close to bright Vega at 9:01:48 p.m. and set in the east by 9:03 p.m.
Monday: This pass should be similar to Friday's, but it will happen a bit earlier with a brighter sky. Look for the crescent moon low in the west at 8:37 p.m. The station should rise to the moon's right and pass very close to Arcturus at 8:40:31 p.m. moving right to left.