In September, Ostend typically sees daytime highs of 18.6°C and overnight lows around 11.2°C. Compared to the annual average high of 13.1°C, September runs +5.5°C.
September in Ostend averages a daytime high of 18.6°C and an overnight low of 11.2°C.
September runs +5.5°C compared to Ostend's annual average high of 13.1°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 18.6°C and cooler evenings around 11.2°C.