With temperatures rising and the days lengthening, Rhode Island is preparing to open four South County beaches. The state Department of Environmental Management announced Tuesday that Scarborough North, Roger Wheeler, East Matunuck, and Misquamicut state beaches will be open from 9 a.m. to 6 p.m. on weekend days only beginning Saturday. The freshwater beach at Lincoln Woods State Park will also open Saturday. All state beaches will be open daily beginning Memorial Day. This year’s residential beach parking passes cost $10 on weekdays and $14 on weekends and holidays. Nonresidents pay $20 for weekdays and $28 for weekends and holidays.