The parish offers a variety of climate, vegetation and scenery. The capital, Mandeville, is situated at an elevation of . The town is noted for its climate, and temperatures range from a low of in December and January, to a high of in July and August. There are very few rivers in the parish, and the existing ones are rather small; Alligator Hole River, Alligator Pond River, Gut River, Hector's River, Two Rivers and Swift River. Hector's River runs along the border of Manchester and Trelawny, sinks at Troy where it flows underground for approximately six kilometres