Morning mist and fog patches across Flanders and Antwerp will clear towards the coast on Tuesday, giving way to sunny skies across most of Belgium. Morning temperatures started near 10 °C in most regions, registering 7 °C in Namur and Charleroi, 9 °C in Liège and Mons, 10 °C in Brussels, and 13 °C along the coast. Afternoon highs are expected to reach between 19 °C and 24 °C, with 19 °C at the sea, 20 °C to 22 °C in the east and south, 23 °C in Namur, and 24 °C in Couvin. Cloud cover will increase from the west and south overnight, with minimum temperatures between 8 °C and 12 °C.

Conditions will deteriorate starting Wednesday afternoon as rain arrives from the French border around 15:00 to 16:00. The disturbance will cross the country through Wednesday night, producing rainfall totals between 10 mm and 25 mm while daytime temperatures remain mild between 18 °C and 23 °C. Behind the front on Thursday, temperatures will drop by up to 10 °C, keeping highs between 10 °C and 14 °C alongside northwest wind gusts reaching 50 km/h and frequent showers. A second disturbance on Friday will bring additional rainfall, with temperatures between 9 °C and 18 °C from south to west.