Forecast models from sources like NIWA, MetService, and international agencies show Wellington's August 11 maximum likely settling near 12–13°C, reflecting typical winter maritime variability with limited diurnal heating under variable cloud and moderate winds. Northerly flows can briefly elevate readings toward 13°C by advecting milder air, while stronger southerlies or increased cloud cover favor the lower end around 12°C; sea-surface temperatures near 12–14°C further moderate extremes in this coastal setting. Ensemble guidance exhibits small spread in the short-range window, explaining the near-even market split between those two outcomes, with historical August highs averaging 13°C providing context but little resolution power two days out. Updated model runs and official briefings over the next 24–48 hours will likely refine the distinction.