**Official short-term forecasts from MetService indicate a maximum of 15°C for Wellington on August 13, with mostly cloudy skies, a period of morning rain, and light winds.** This aligns closely with the market's heavy weighting toward 15°C (69%) over 14°C (25.5%), reflecting trader consensus around near-average winter conditions. August climatology in Wellington typically features daily highs of 12–14°C, so a 15°C peak represents a modest positive anomaly driven by the current synoptic pattern rather than strong warming. **NIWA’s seasonal outlook for June–August 2026 assigns the highest probability (45%) to near-average temperatures across the Wellington region, consistent with these odds and the absence of blocking highs or northerly flows that could push readings to 16°C or above.** Model guidance shows limited intensification potential or clear-sky heating tomorrow, keeping the distribution tightly centered on 14–15°C. Fresh forecast updates from monitoring agencies will be the key near-term catalyst for any shifts in implied probabilities.