worldweather19°Cnear normal
usually 18°C–22°C
night: exceptionally warm
rain: more rain than usual
wind: typical
Weather in Rotterdam - 14-day forecast
Detailed weather forecast for Rotterdam, Netherlands: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Rotterdam
today☁️
19°💧 3.3 mm
Sun☁️
21°💧 6.9 mm
Mon☁️
26°💧 0.1 mm
Tue🌧️
18°💧 4 mm
Wed🌧️
18°💧 3.5 mm
Thu🌧️
16°💧 2 mm
Fri🌧️
19°💧 2.9 mm
Sat🌧️
18°💧 2 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Monday 7 Sept in Rotterdam, the forecast high is 26°C. Typical daytime temperatures at this time of year range from 17°C to 22°C, so it will be exceptionally warm. It is warmer than 97% of similar days.
21°Cwarmer than usual
usually 17°C–22°C
warmer than 77% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: exceptionally light
26°Cexceptionally warm
usually 17°C–22°C
warmer than 97% of similar days
night: exceptionally warm
rain: typical rainfall
wind: typical
18°Ccooler than usual
usually 17°C–22°C
cooler than 71% of similar days
night: warmer than usual
rain: more rain than usual
wind: typical
18°Ccooler than usual
usually 17°C–22°C
cooler than 71% of similar days
night: near normal
rain: more rain than usual
wind: typical
16°Ccooler than usual
usually 17°C–22°C
cooler than 88% of similar days
night: exceptionally warm
rain: typical rainfall
wind: lighter than usual
19°Cnear normal
usually 17°C–21°C
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.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 20°C by day. The coolest year was 1986 (15°C) and the warmest was 2023 (28°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Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window.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 - Rotterdam
No active weather warnings for Rotterdam (region: Zuid-Holland). The national weather service is not forecasting dangerous conditions.
14-day forecast - Rotterdam
Rotterdam 30 & 45-day weather - long-range outlook
Next 16 days · forecast
21°
around 17° at night · days with rain: 10
Weeks 3-4 · avg for September
19°
around 11° at night · rain chance 57%
Weeks 5-7 · avg for October
15°
around 9° at night · rain chance 66%
The 30 & 45-day outlook for Rotterdam: the next 16 days are a numerical forecast updated daily - on average 21° by day and 17° at night. Further out we rely on multi-year climate averages: around 19° in September, and about 15° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Rotterdam
Saturday5 September 2026
☁️19°overcast clouds
Sunday6 September 2026
☁️21°broken clouds
Monday7 September 2026
☁️26°broken clouds
Tuesday8 September 2026
🌧️18°light rain
Wednesday9 September 2026
🌧️18°light rain
Thursday10 September 2026
🌧️16°light rain
Friday11 September 2026
🌧️19°light rain
Saturday12 September 2026
🌧️18°light rain
Sunday13 September 2026
🌧️20°light rain
Monday14 September 2026
☀️20°clear sky
Tuesday15 September 2026
☁️23°overcast clouds
Wednesday16 September 2026
☁️21°overcast clouds
Thursday17 September 2026
🌧️22°light rain
Friday18 September 2026
🌤️25°scattered clouds
Saturday19 September 2026
☀️29°clear sky
Sunday20 September 2026
☁️30°overcast clouds
UV index in Rotterdam - is it safe to sunbathe?
Today the UV index in Rotterdam is 5 (moderate) - unprotected fair skin can burn in about 40 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
Pollen in Rotterdam - info for allergy sufferers
Today grasses pollen is highest in Rotterdam - about 2 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.
Sea temperature - Rotterdam
Water today
20°C
Week avg
20°C
How's the water?
brisk
16-day sea temperature forecast:
Average sea temperature through the year:
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Air quality and smog in Rotterdam
Air quality in Rotterdam is currently very good. Fine particulate PM2.5: 4.3 µg/m³, PM10: 10 µg/m³.
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| Rotterdam | 4.3 | 10 | very good |
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).
Rotterdam weather through the year
Warmest, driest months on average: May, June, July, August.
Upcoming public holidays in Netherlands: Christmas Day — 25 December · St. Stephen's Day — 26 December · New Year's Day — 1 January.
Nearby and related places
FAQ - Rotterdam weather
What is the weather like in Rotterdam today?
Today it is about 19° during the day and 16° at night, overcast clouds.
How far ahead can I check the forecast for Rotterdam?
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.