Catalogue Shom
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Wave forecasting models allow the representation of sea states based on a spectral resolution at the global scale or at the scale of ocean basins. This code calculates the evolution of the sea state by decomposing it into a wave spectrum that propagates in different directions and with different periods. During the propagation, the wave energy is increased or decreased by the effects of wind, breaking waves and energy exchanges between the different components. The wave forecasts available on data.shom.fr are calculated with 2 different types of models: MFWAM for the offshore domain (resolution from 0.5° to 0.1°) and Wavewatch III ® (WW3) for the coastal domain (resolution from 2' to 200m). MFWAM is a sea state forecasting model (wind wave and swell) derived from the third generation WAM code (WAMDI Group, 1988). Wavewatch III ® (WW3) is developed in a collaboration between the United States Weather Service (NOAA/NCEP), Shom, the University of Darmstadt in Germany, and other partners. The forecasts published on data.shom.fr are issued from the parameterization carried out and optimized by the Shom and Météo-France within the framework of the Homonim project (national coastal flood/wave/storm warning system).
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<em>WW3 wave data updated on: 18-09-2026T00:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>Surge and water level data updated on: 05-09-2026T18:00Z</em><br /> <br /> This product features numerical forecasts of storm surges and water level with respect to the mean sea level, computed using the TOLOSA-SW (Shallow water code) hydrodynamic model for for the Atlantic/Channel/North Sea domain and the HYCOM 2D model for the mediterranean coasts and for Caribbean and Guyana, SW Indian ocean overseas domains.<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_niveaux.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 08-09-2026T18:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>Surge and water level data updated on: 03-11-2024T00:00Z</em><br /> <br /> This product features numerical forecasts of storm surges and water level with respect to the mean sea level, computed using the HYCOM 2D hydrodynamic model for the French mainland coasts and for Caribbean and Guyana, SW Indian ocean overseas territories.<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_niveaux.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 08-09-2026T00:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 10-09-2026T00:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 17-09-2026T00:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 18-09-2026T00:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />
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<em>WW3 wave data updated on: 17-09-2026T18:00Z</em><br /> <br /> This product contains the wave forecasts, computed with wave models MFWAM (Météo-France) and Wavewatch III ®. The displayed variables are the significant height, direction and peak period for the total sea, wind sea, primary and secondary swells (3-hour time steps).<br /> <br /> <em>More information (in French): <a href="https://services.data.shom.fr/static/specifications/Descriptif_Contenu_oceano_vagues.pdf" title="access to product user manual (in french)" target="_new">product user manual</a></em><br />