Data in JSON and CSV formats

From the dataset abstract

UiRaS pilot measures automatically swimming water temperature using sensors, which are located at several swimming places in Helsinki, Espoo and Vantaa.

Data from sensors is sent to database every 30 minutes. Data is transferred to files below every 5 to 60 minutes depending on the file.

All data is downloadable in several files:

• uiras-all-data.csv contains all measurements from the beginning of 2020.
• uiras-meta.json contains metadata of sensors. Coordinates are in GPS/WGS84 coordinate system.
• uiras2_v1.json contains the data of last 2 weeks, including sensor metadata.

Source: Veden reaaliaikainen lämpötila pääkaupunkiseudun uimarannoilla