**Forecast models and seasonal context position 13–14°C as the most probable range for Wellington’s maximum temperature on August 15, 2026.** Wellington’s August climatology features average daily highs near 12–13°C, with typical variability driven by the passage of cold fronts, southerly winds, and occasional warmer northerly flows. NIWA’s June–August 2026 outlook assigns the highest probability (45%) to near-average temperatures for the Wellington region, consistent with the current market-implied distribution that heavily favors 13°C and 14°C. Short-range guidance from sources such as MetService and international models currently projects highs of 11–14°C for the 15th, reflecting modest uncertainty in frontal timing and wind direction that can shift the daily maximum by 1–2°C. No significant anomalies or extreme events are indicated in the latest model runs, keeping probabilities for outcomes above 15°C or below 12°C low. Updated model consensus and any revised NIWA guidance ahead of the weekend will be the key near-term drivers of further market movement.