In general, afternoon rates are always lower at the golf courses. In general, the rates in the summer are the "average" rates. Mid-spring rates and early fall rates tend to be the highest, and January/February rates tend to be the lowest.
During the summer, many of the golf courses can be played in the afternoon for between $50 and $60. In the morning, the rates are typically in the $80-$120 for many of the courses. The courses in Bluffton, just off island, tend to be even cheaper at all times of the year as compared with those on island.