1-2 lb a week is a good rate.
I've been stuck in the 162 range for 2 months. Granted I'm around 10% body fat at that weight, which is in pro athlete territory.
Going to the beach will motivate you, but not in the way I had thought. I was out there kayak fishing this weekend. when I landed, the beach was much more crowded than when I launched. And heavy. Damn America, we need to do something about how we eat and live. Maybe 1 in 10 people over the age of 10 was at a healthy body weight on that beach, and a lot of the kids were way overweight too. It's a matter of health and quality of life. As someone who has been obese, and come back from it, I almost can't convey how much better life is after getting back to a healthy weight and fitness level. It affects almost every aspect of your life in positive ways. Keep at it, and you will start to experience it yourself.