Post-frontal warming after a strong cold front passage over the Western Cape is the main driver behind trader consensus clustering on 26–28°C maxima for Cape Town on August 13. Recent South African Weather Service guidance and global models show a moderating Atlantic high weakening onshore flow, enabling subsidence warming and advection of milder air masses typical of late-winter transitional patterns. This follows cooler conditions tied to the preceding system, with historical August variability (average highs near 18°C) underscoring how episodic warming episodes can push daytime peaks into the mid-20s. Close probabilities among leading outcomes reflect model spread on residual cloud cover, exact timing of high-pressure strengthening, and minor cool advection, all of which introduce uncertainty ahead of the next model runs and surface observations.