**Trader sentiment for the highest temperature in Seoul (Incheon) on August 16 centers on 28–30°C outcomes because short-range guidance from the Korea Meteorological Administration (KMA) and coastal moderation point to a modest peak rather than the mid-30s seen earlier in the month.** Incheon’s proximity to the Yellow Sea introduces sea-breeze cooling and higher boundary-layer moisture that often caps daytime maxima below inland Seoul readings. Recent model consensus shows mostly cloudy skies with only 20% precipitation probability, limiting surface heating while the lingering effects of early-August heatwave patterns keep baselines elevated. Historical August climatology for the region centers near 30–31°C, but increased cloud cover this week has already trimmed expected highs by 2–3°C relative to clear-sky scenarios. With resolution dependent on the official Incheon station observation, traders are weighting the balance between KMA’s 33°C point forecast and the moderating marine influence, producing the tight clustering around 29°C as the modal outcome.