Rotterdam, one of the world’s busiest ports, sits at the mouth of the Rhine-Meuse delta and receives around 850 mm (about 33 inches) of rain a year, spread fairly evenly through the seasons under the same rotating Atlantic weather systems that affect the rest of the Netherlands. Much of the city sits below sea level, and its extensive system of dikes, pumps, and the famous Maeslant storm surge barrier are designed to manage the combined risk of heavy rain, river flow, and North Sea storm surge together. Short, sharp showers are common year-round given the maritime climate. Because the margin for error here is genuinely small given how much of the city sits below sea level, radar is a routinely used practical tool. The Royal Netherlands Meteorological Institute, KNMI, operates the national radar network.
Learn more: How Does Rain Radar Work? · Open the full Rain Map
Frequently Asked Questions
Is it raining in Rotterdam right now?
The live radar map above shows precipitation over Rotterdam, South Holland in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Rotterdam, no significant rain is currently being detected.
How often does the Rotterdam rain radar update?
The radar refreshes continuously, typically every few minutes, so the map reflects current conditions rather than an hours-old forecast. Press play to animate the most recent frames.
Can I see if a storm is heading toward Rotterdam?
Yes. Press play on the radar to animate the last few hours of rainfall and watch which way rain cells over South Holland are moving – the clearest way to judge whether a shower will reach Rotterdam or pass by.
Is this Rotterdam rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.