Swedish hydrological observations
The Swedish national hydrological record: river discharge at fifteen-minute, daily and monthly resolution, water level, water temperature, ice formation and break-up, and snow water content, across 720 gauging stations.
Rights
- Licence
- CC BY 4.0
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- YesData from Sveriges meteorologiska och hydrologiska institut, used under CC BY 4.0.
- Terms last checked
- 25 August 2026
Access and coverage
- Publisher
- Sveriges meteorologiska och hydrologiska institut
- Geographic coverage
- Sweden — 720 discharge stations, 299 currently active
- Temporal coverage
- 1851 onwards
- Resolution
- Discharge published by SMHI at fifteen-minute, daily and monthly resolution
- Update frequency
- daily
- Formats
- json, csv, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- river flow, temperature
Notes
The deepest open river record Hydrionis holds. It is unusual in two ways that matter: the record reaches back to 1851 — deeper than anything Hydrionis holds outside the English and Met Office series — and SMHI publishes discharge already aggregated to daily and monthly, so Hydrionis would store the publisher’s own aggregate rather than computing one from sub-hourly readings and having to defend the method. Stored as one file per main drainage basin: the whole daily archive is roughly 200 MB, which as a single file would be eight times the largest Hydrionis holds, and a basin is the unit a river profile actually asks for.
What Hydrionis holds from this publisher
The publisher’s own coverage is above. This is what Hydrionis has actually taken from it, at the subjects it measures — gauges, boreholes, reservoirs or places.
What is measured
- Mean river flow · m³/s
How current it is
- Current
- Read from SMHI 4 days ago, and the newest daily value covers 2026-09 — as current as this source gets.
Hydrionis products built from it
Where this publisher’s data reaches a reader. Each has its own page, with its licence and how to cite it.