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HIDRA forecast

This page shows a live 72h sea-level HIDRA[1] forecast for the Koper Mareographic Station (northern Adriatic Sea), Slovenia. The measurements are shown in black (24h gray area indicates the input to HIDRA), while 72h 2-sigma bound forecast is shown in blue. Standard warning levels are indicated by yellow (low), orange (medium) and red (high).

Use the slider to inspect the prediction accuracy in older forecasts.


HIDRA is a deep model for sea-level forecasting and is the result of a collaboration between the Visual Cognitive Systems Lab, University of Ljubljana, Faculty of Computer and Information Science, the Marine biology station at the National Institute of Biology and the Slovenian Environment Agency (ARSO). HIDRA bases its predictions on ensemble weather forecasts of the European Centre for Medium-Range Weather Forecasts (ECMWF) and past 24 hours of sea-level measurements at the Koper Mareographic Station (source: ARSO). The model was trained on a dataset of ECMWF weather forecasts for the years 2006-2020 and Koper sea-level measurements for the same time period.

Links and contact information

HIDRA GitHub repository:

Contact email:


[1] Lojze Žust, Anja Fettich, Matej Kristan, and Matjaž Ličer: HIDRA 1.0: deep-learning-based ensemble sea level forecasting in the northern Adriatic, Geosci. Model Dev., 14, 2057–2074,, 2021.