Still mountain lake at dawn, snow-capped peaks reflected in the water

Every lake, measured.

Water temperature and level for any lake or coastal spot, from a single GPS point.

Try the demo See pricing

One request. One honest reading.

Send a position, get back the lake, its latest values and when they were measured. Nothing more to set up.

11.8°C

Water temperature

481.3m

Water level, −6.7 m below summer level

Lac de Monteynard, 15 November, 08:40. Sample values.

Alpine lake and village below snowy peaks at sunrise

Lakes move. Now you can see it.

Reservoirs rise and fall by metres across a season. Lakemetric tells you where the water is today, and how far that is from normal.

Click a lake. See the answer.

This is exactly what your website receives. Click inside a lake, on a beach, or anywhere in between.

Sample values. Live readings arrive with the public launch.

Lakes and coastal spots.
One API.

The same key and the same request work for an alpine reservoir and a Mediterranean beach.

Lake Annecy seen from the mountains above

Lakes

Temperature, level, and the gap to the lake's reference level.

Surface temperature
Water level in metres
Gap to reference level
Up to a year of history

Curved sandy beach on a blue Mediterranean bay

Coastal spots

Sea temperature for beaches, surf spots, harbours and dive sites.

Surface temperature
Spot name and area
Up to a year of history
No water level at sea

Made for people who check the water first.

Anglers

A falling lake moves the fish and closes launch ramps. Show the level on your club page every morning.

Sailing and water sports

Know if the lake is navigable before anyone drives to the slipway.

Campsites and beaches

A live water temperature on your booking page sells the swim better than any photo.

Surf and diving

Today's sea temperature on your spot, so riders pick the right wetsuit.

Tourism and lake authorities

Publish the level automatically instead of typing it in by hand.

Weather and outdoor apps

One endpoint, plain JSON, predictable quotas. Integrate it in an afternoon.

Clear turquoise lake water over granite boulders, seen from above

Absent rather than wrong.

If a lake is too small to measure reliably, we don't list it. Every value comes with its date and a quality score.

Lake Tahoe

3 km²

Minimum size for temperature. Open water away from the shore, under a clear sky.

10 km²

Minimum size for level. Below that, only lakes we have checked on site.

48 h

After two days, a reading is flagged as old. Your site never shows yesterday's water as today's.

Start free. Pay as you grow.

Free

€0

200 requests a day. One lake or spot. Today's reading.

Get a free key

Standard

€9 a month

5,000 requests a day. Every lake and spot. 30 days of history.

Choose Standard

Pro

€29 a month

50,000 requests a day. A year of history. Priority support.

Choose Pro

Custom

On request

Higher volumes, a lake checked on site, invoicing.