Current short-term forecasts from the Hong Kong Observatory and global models place the May 18 maximum near 27–28 °C, with a 40–60 % chance of showers that could limit afternoon heating. This narrow range explains the near-even market shares for 26 °C, 27 °C, and 28 °C. Key differentiating factors include the strength of the southeasterly monsoon flow, the timing and coverage of any convective clouds, and local sea-breeze effects that typically cap temperatures a degree or two below the seasonal average. Above-normal May temperatures linked to the long-term warming trend and residual El Niño influence keep the slight upside risk for 29 °C alive, but persistent moisture and modest wind speeds make outcomes above 30 °C unlikely. Updated model runs and the next HKO bulletin will refine these probabilities ahead of resolution.