Monday will be sunny across Belgium, with temperatures rising to 25° or 26° near the coast and 29° or 30° inland. There will be a light easterly wind, with a moderate sea breeze picking up in the afternoon.
Monday and Tuesday night will remain mild and clear. Minimum temperatures will range from 13° in the Ardennes to 18° in the major cities, with a light easterly wind.
Tuesday will be very warm with plenty of sunshine. Maximum temperatures will range from 28° at the coast and in the High Fens to 33° or 34° in the centre and the far south.
Thunderstorms and clear spells
Wednesday will be sunny and oppressively warm with maximum temperatures of 27° to 33°. Towards the evening or during the night, thunderstorms may move in from France.
Thursday will be warm and unstable, with a few periods of rain or thunderstorms moving across the country from west to east. Clear spells will then follow from the west.
The last showers will leave the Ardennes during the evening. Maximum temperatures will range from 24° at the coast to 31° in the Kempen and Gaume regions. The weak and variable wind will later tend to north-westerly.
To qualify as a heatwave, temperatures must be warmer than 25° for at least five days and warmer than 30° for three days.
Friday will be another warm, sunny day, with maximum temperatures of 23° at the coast and 29° inland.
Saturday may start with low clouds from the North Sea but the sun should break through during the day. Maximum temperatures will range between 23° and 28°. Sunday will see sunny spells and maximum temperatures of 22° to 27°.
