Surface runoff
Megray Hill is situated approximately 1.1 kilometers to the north of Stonehaven; surface runoff and drainage from the northern and eastern slopes of Megray Hill flow north to the Burn of Muchalls. Surface runoff from the south flank flows is within the Cowie Water catchment area, the Cowie Water being a very slightly alkaline stream These low pH levels (compared to other area streams) may be caused in part by the peat drainage from the moorland on Meikle Carewe Hill and Curlethney Hill through the tributary Burn of Monboys.