**Recent forecasts from the Korea Meteorological Administration (KMA) and international models point to a daytime high near 29–30°C for Incheon on August 26, 2026, with most guidance clustering in the 27–31°C range.** This reflects a modest cooldown from the ongoing heat wave (highs of 31–35°C+ on August 24–25), driven by increased cloud cover, scattered showers or drizzle, and westerly flow that limits daytime heating while maintaining high humidity. Key drivers include extensive low- to mid-level clouds (often 80–100% cover in model runs), light winds (typically 4–8 mph or 2–4 m/s from the west or southwest), and modest precipitation chances (5–20 mm possible), all of which cap peak temperatures. Incheon’s coastal location adds a slight marine moderation compared to inland Seoul sites. Model consensus (GFS, ECMWF, and KMA) shows limited spread, with the main uncertainty tied to exact timing and intensity of any showers and how quickly skies clear. Traders have priced 29°C and 30°C as the clear leaders (combined ~65% implied probability) because these align with the central tendency of official outlooks and ensemble means; 31°C receives secondary support if clouds break earlier or rain holds off, while lower or higher outcomes remain low-probability outliers given current atmospheric conditions and historical late-August baselines. New KMA updates and model runs over the next 48 hours will be the primary catalysts for any shifts.