Weather in Belgium - today, tomorrow and 14-day forecast

Right now temperatures across Belgium range from 20° to 22°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.

Country values are the median of forecasts from 9 cities; the range shows local differences. Methodology.

Weather in Belgium's cities today

🌧️Liège 22°💧 0.2 mm ☁️Brussels 21°💧 0.6 mm ☁️Namur 21°💧 0.1 mm 🌧️Spa 21°💧 0.6 mm 🌧️Verviers 21°💧 0.5 mm 🌤️La Louvière 21°💧 0.8 mm 🌧️Bastogne 20°💧 0.4 mm 🌤️Mouscron 20°💧 2.8 mm ☁️Heist-op-den-Berg 20°💧 1.2 mm

Weather map - today's temperatures

Pill colour shows today's daytime temperature. Click a city for its full 14-day forecast.

Next days in Belgium

today☁️ 21°💧 0.6 mm

Sun☁️ 22°💧 0.5 mm

Mon☁️ 27°💧 2.7 mm

Tue🌧️ 18°💧 0.4 mm

Wed🌧️ 18°💧 0.4 mm

Thu🌧️ 18°💧 0.3 mm

Fri🌧️ 17°💧 4.1 mm

Sat☁️ 18°💧 4 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Monday 7 Sept in Belgium, the forecast high is 27°C. Typical daytime temperatures at this time of year range from 18°C to 23°C, so it will be exceptionally warm. It is warmer than 94% of similar days.

Saturday 5 Sept

21°Cnear normal

usually 18°C–24°C

night: exceptionally warm rain: typical rainfall wind: typical

Sunday 6 Sept

22°Cnear normal

usually 18°C–23°C

night: exceptionally warm rain: typical rainfall wind: exceptionally light

Monday 7 Sept

27°Cexceptionally warm

usually 18°C–23°C

warmer than 94% of similar days

night: exceptionally warm rain: more rain than usual wind: stronger than usual

Tuesday 8 Sept

18°Ccooler than usual

usually 17°C–23°C

cooler than 70% of similar days

night: warmer than usual rain: typical rainfall wind: typical

Wednesday 9 Sept

18°Ccooler than usual

usually 17°C–23°C

cooler than 73% of similar days

night: warmer than usual rain: typical rainfall wind: stronger than usual

Thursday 10 Sept

18°Ccooler than usual

usually 17°C–23°C

cooler than 72% of similar days

night: exceptionally warm rain: typical rainfall wind: typical

Friday 11 Sept

17°Ccooler than usual

usually 17°C–23°C

cooler than 81% of similar days

night: warmer than usual rain: more rain than usual wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 20°C by day. The coolest year was 1984 (14°C) and the warmest was 2023 (29°C). The current forecast averages 20°C - close to the historical median.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Belgium

No active weather warnings for Belgium. The national weather service is not forecasting dangerous conditions.

14-day forecast - Belgium

Belgium - 14-day weather forecast infographic

Belgium 30 & 45-day weather - long-range outlook

Next 16 days · forecast

21°

around 16° at night · days with rain: 6

Weeks 3-4 · avg for September

21°

around 10° at night · rain chance 46%

Weeks 5-7 · avg for October

16°

around 8° at night · rain chance 53%

The 30 & 45-day outlook for Belgium: the next 16 days are a numerical forecast updated daily - on average 21° by day and 16° at night. Further out we rely on multi-year climate averages: around 21° in September, and about 16° in October. Forecasts beyond two weeks are indicative only.

Today vs the next days - Belgium cities

City	Today	+3 days	+7 days	Rain today
🌧️ Liège	22℃	18℃	18℃	0.2 mm
☁️ Brussels	21℃	19℃	18℃	0.6 mm
☁️ Namur	21℃	18℃	19℃	0.1 mm
🌧️ Spa	21℃	15℃	16℃	0.6 mm
🌧️ Verviers	21℃	16℃	17℃	0.5 mm
🌤️ La Louvière	21℃	20℃	19℃	0.8 mm
🌧️ Bastogne	20℃	18℃	17℃	0.4 mm
🌤️ Mouscron	20℃	20℃	20℃	2.8 mm
☁️ Heist-op-den-Berg	20℃	20℃	18℃	1.2 mm

Day-by-day forecast for Belgium

Saturday5 September 2026

☁️21°broken clouds

night 14° · evening 21° · rain 0.57 mm · humidity 48% · wind 6 m/s · clouds 71%

Sunday6 September 2026

☁️22°overcast clouds

night 17° · evening 24° · rain 0.51 mm · humidity 42% · wind 3 m/s · clouds 98%

Monday7 September 2026

☁️27°overcast clouds

night 18° · evening 24° · rain 2.7 mm · humidity 42% · wind 7 m/s · clouds 90%

Tuesday8 September 2026

🌧️18°light rain

night 14° · evening 16° · rain 0.42 mm · humidity 56% · wind 6 m/s · clouds 100%

Wednesday9 September 2026

🌧️18°light rain

night 12° · evening 16° · rain 0.38 mm · humidity 48% · wind 7 m/s · clouds 34%

Thursday10 September 2026

🌧️18°light rain

night 17° · evening 18° · rain 0.27 mm · humidity 60% · wind 6 m/s · clouds 90%

Friday11 September 2026

🌧️17°light rain

night 13° · evening 16° · rain 4.05 mm · humidity 85% · wind 7 m/s · clouds 100%

Saturday12 September 2026

☁️18°broken clouds

night 12° · evening 15° · rain 3.96 mm · humidity 51% · wind 5 m/s · clouds 68%

Sunday13 September 2026

🌤️20°scattered clouds

night 12° · evening 15° · rain 0.93 mm · humidity 47% · wind 4 m/s · clouds 47%

Monday14 September 2026

☀️21°clear sky

night 13° · evening 16° · rain 1.62 mm · humidity 37% · wind 4 m/s · clouds 13%

Tuesday15 September 2026

🌧️23°light rain

night 17° · evening 19° · rain 0.93 mm · humidity 46% · wind 3 m/s · clouds 73%

Wednesday16 September 2026

🌧️18°light rain

night 17° · evening 19° · rain 1.89 mm · humidity 76% · wind 7 m/s · clouds 99%

Thursday17 September 2026

☁️21°overcast clouds

night 16° · evening 18° · rain 0.27 mm · humidity 57% · wind 6 m/s · clouds 93%

Friday18 September 2026

🌤️25°a few clouds

night 18° · evening 21° · rain 9.3 mm · humidity 50% · wind 6 m/s · clouds 19%

Saturday19 September 2026

☀️30°clear sky

night 22° · evening 24° · humidity 31% · wind 6 m/s · clouds 7%

Sunday20 September 2026

☁️30°overcast clouds

night 24° · evening 24° · humidity 37% · wind 4 m/s · clouds 94%

Pollen in Belgium - info for allergy sufferers

Today grasses pollen is highest in Belgium - about 1 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Air quality and smog in Belgium

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Antwerpia	7.5	12.9	very good
Gandawa	7.1	14.9	very good
Bruksela	5	10.4	very good
Charleroi	4.5	9.3	very good
Namur	4.3	8.1	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).

Belgium weather through the year

Belgium weather month by month - when is the best time to go?

January (6°)February (7°)March (11°)April (16°)May (19°)June (23°)July (26°)August (24°)September (21°)October (16°)November (10°)December (8°)

Weather in other countries in Europe

Bosnia and HerzegovinaBelarusBulgariaAustriaCroatiaAndorra

Public holidays in Belgium - when are the long weekends?

Next long weekend in Belgium: Christmas Day (25 December, Friday) - Friday–Sunday (3 days off).

2026

1 NovemberSunday

All Saints' Day

falls on a weekend

11 NovemberWednesday

Armistice Day

25 DecemberFriday

Christmas Day

long weekend

2027

1 JanuaryFriday

New Year's Day

long weekend

28 MarchSunday

Easter Sunday

falls on a weekend

29 MarchMonday

Easter Monday

long weekend

1 MaySaturday

Labour Day

falls on a weekend

6 MayThursday

Ascension Day

long weekend + bridge day

17 MayMonday

Whit Monday

long weekend

21 JulyWednesday

Belgian National Day

15 AugustSunday

Assumption Day

falls on a weekend

1 NovemberMonday

All Saints' Day

long weekend

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave. Lunar holiday dates marked as tentative may shift by one day after the official announcement.

Calendar sources

Nager.Date public holiday database

FAQ - Belgium weather

What is the weather like in Belgium today?

Today it is about 21° during the day and 14° at night, broken clouds.

How far ahead can I check the forecast for Belgium?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.