December in Ostend averages a daily high of 7.3°C with nights around 3.7°C. Expect roughly 18.1 wet days totalling 77.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Ostend is June–September.
Based on WEST SOUBURG, NL (53.5km), 1995–2024. 30 years of December data.