My time of the month is expected tomorrow so I'm kind of expecting my weight to not be completely accurate during that time. From your experiences, ladies, when does the water weight start showing on the scale. Like I said, I'm expecting my period tommorrow, and when I weighed myself this morning I gained about a pound. I didn't exactly eat that great yesterday, but I don't think it was reason enough to gain any weight at all much less 1 pound. From your experiences have you noticed your weight rising at this time??