Latest forecast guidance from the South African Weather Service points to a daytime maximum of 21°C in Cape Town on May 16, supported by light northerly flow and partial afternoon clearing that permits modest solar heating without strong advection of warmer air. This aligns closely with the current climatological average high of 19–21°C for mid-May, when the subtropical high-pressure ridge typically limits rapid warming over the Cape Peninsula. Model consensus shows minimal spread, with only modest upside risk if winds shift easterly and allow brief katabatic warming, or downside if residual cloud cover from a departing frontal system persists. Resolution will hinge on the official maximum recorded at Cape Town International Airport, with traders weighting the 21°C outcome most heavily given the stable synoptic pattern.