Ireland River Levels, Flow & Water Temperature (OPW)

River and lake levels, river flow and water temperature for the Republic of Ireland, from about 400 official OPW stations: 15-minute readings for the last month and daily figures back decades.

Official hydrometric data from the Office of Public Works (OPW) Hydro-Data service for the Republic of Ireland, as clean rows. No API key, no account.

• Water level at rivers, lakes and tidal gauges, river flow at ~300 flow stations, and water temperature, from roughly 400 republishable OPW stations.
• Daily mean/min/max for the full period of record (many stations go back to the 1950s-1990s).
• 15-minute readings for about the last month.
• Annual maxima (yearly peak level or flow), the series used in flood frequency studies.
• Filter by river or lake, catchment, station name, station numbers, station type or distance from a point (nearest first).
• A station directory mode lists stations with coordinates, waterbody, catchment, river basin district, catchment area, gauge datum and OPW's station description.

Pairs with our UK River Flow, Rainfall & Groundwater (EA Hydrology) and Scotland River Levels, Flow, Rainfall & Tides (SEPA) tools for coverage across Great Britain and Ireland.

Uses

Flood risk and insurance, hydropower and abstraction planning, angling and paddling conditions, Shannon navigation, agriculture, environmental consultancy, research and dashboards.

Example input

{ "dataType": "riverFlow", "waterbody": "Shannon", "maxStations": 3, "maxResults": 100 }

Output (one row per station and period)

stationId, stationName, waterbody, catchment, riverBasinDistrict, stationClass, latitude, longitude, distanceKm, catchmentAreaKm2, gaugeDatum, gaugeDatumUnit, dataType, resolution, date, dateTime, unit, value | mean | min | max, aggregationCoveragePct, series (annual maxima), qualityCode, sourceUrl, licence, scrapedAt. Rows are newest first. Water levels are in metres above Ordnance Datum (usually Malin Head; see gaugeDatumUnit).

Run it on a schedule

Save your input as a task and add it to Apify Schedules (for example, daily at 07:00) to get a fresh table every day. Each run can be pushed to Google Sheets, a webhook, Slack or your database through Apify integrations.

Pricing

$1.00 per 1,000 rows on the Free and Bronze plans, $0.90 per 1,000 on Silver and $0.80 per 1,000 on Gold, plus a start fee of $0.005 per GB of run memory. A typical run of a few hundred rows costs well under $1.

Important: data quality

OPW states that its data is provisional, unchecked and not validated, may contain errors or gaps, and is provided without any warranty. Check it is fit for your purpose before relying on it, and pass these notes on to anyone you share the data with. Full terms: OPW Hydro-Data disclaimer and waterlevel.ie data quality notes. qualityCode is OPW's own code, passed through as published. For river flow, OPW often leaves the daily mean blank for recent months until it has been checked, so recent daily flow rows may carry only min and max; use resolution: "15min" for the latest flow values.

Only stations numbered 00001-41000 are included, as OPW permits republication of those only. Rain gauges are not included.

If OPW's service is down the run finishes with a single UPSTREAM_OUTAGE row (not charged) instead of failing.

Licence

Contains Irish Public Sector Information licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence (source waterlevel.ie - provided by the Office of Public Works). Not affiliated with the OPW.

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