Logo De Grachtwacht
Donate water 20,7°C


De Grachtwacht measures the temperature of the canal every hour. These are automated measurements in the water near the Marebrug at a water depth of approximately 75 cm.

The main water system of Rijnland (water authority), which the Leiden canals are part of, is kept at around NAP-0,62 metre. This means we measure the water temperature at approximately -1,37 meter NAP.

The current water temperature is 20,7 degrees Celsius. This was measured on Thursday 18 July 2024, 00:42.

Graph last 7 days


Download all measurements (csv format).

The first column has the date and time, the second column the temperature in degrees Celsius (divide by thousand).