Where SeaData's data comes from
SeaData combines many weather, wave, tide and measurement sources. This page lists, per source, who is behind it, what it measures or computes, how fine (resolution), for which area and how often the data refreshes.
Which model wins where? For wind and wave, SeaData picks the best model per position in this order: first whether the model covers the spot at all, then resolution (finer wins), then a penalty for proximity to the model edge (within ~25 km of the edge a model counts for less, as there it is driven by its neighbour rather than its own physics).
Wind models
HARMONIE-AROMEKNMI · Nederland
Resolutie ~2 kmGebied Nederland + NoordzeeRun elk uurVooruit ~60 uur
KNMI's high-resolution, non-hydrostatic model for the Netherlands and the North Sea. Resolves showers and coastal wind in detail. In SeaData it wins around the Dutch coast and southern North Sea.
AROMEMétéo-France · Frankrijk
Resolutie ~1,3-2,5 kmGebied Franse kust, Kanaal, zuidelijke NoordzeeRun elke 3 uurVooruit ~51 uur
France's high-resolution model. Fine along the French coast and the Channel. Retrieved per field and time step via WCS coverage.
ICON-D2DWD · Duitsland
Resolutie ~2,2 kmGebied Duitsland + omgevingRun elke 3 uur
Germany's convection-permitting short-range model. Fine over the German Bight and eastern North Sea.
ICON-EUDWD · Duitsland
Resolutie ~7 kmGebied EuropaRun elke 6 uur
The European nest of ICON. Fills the range between the fine coastal models and the global ones.
ECMWF IFSECMWF · Europa
Resolutie ~9 kmGebied wereldwijdRun 4× per dag
The leading global model. Reliable at larger scale and further ahead; coarser than the coastal models.
ECMWF AIFSECMWF · Europa
Resolutie ~9 kmGebied wereldwijdAI-gedreven
The machine-learning variant of IFS. Same scale, a different approach; useful as an independent second opinion.
ICON globalDWD · Duitsland
Resolutie ~13 kmGebied wereldwijd
Global ICON. Coarse but covers everywhere; a fallback outside the fine domains.
GFSNOAA · Verenigde Staten
Resolutie ~13 kmGebied wereldwijd
The US global model. Worldwide coverage as a fallback.
Open-MeteoOpen-Meteo
Resolutie ~11 kmGebied wereldwijd
An aggregator of public models. Fills only what is missing locally; the free tier is non-commercial.
Wave models
CMEMS Wave (AMM15)CMEMS · Copernicus Marine
Resolutie ~1,5 kmGebied NW-Europees platUpdate 2× per dag
Copernicus' North-West Shelf wave model. Fine grid over the entire NW-European shelf; the backbone of SeaWave.
Met Office NWSMet Office · Verenigd Koninkrijk
Resolutie ~1,5 kmGebied NW-Europees plat (AMM15)Run 1× per dag
Same AMM15 domain and resolution as CMEMS, but an independent run. Useful as a comparison alongside CMEMS.
MFWAMMétéo-France
Resolutie ~2,5 kmGebied Golf van Biskaje t/m NoordzeeRun driehuurlijks (dataset 00Z)
France's wave model, with separated swell components. Strong in the south-west and on the open sea.
DMI WAMDMI · Denemarken
Resolutie ~1,1 kmGebied Deense waterenRun elk uur
Denmark's wave model. The finest grid of all, over Danish waters and the eastern North Sea.
Met Office Global WaveMet Office · Verenigd Koninkrijk
Gebied NW-Europa (mondiaal grid)Run 1× per dag
The coarser global wave nest; a fallback where the fine models do not reach.
Tide
RWS metingRijkswaterstaat · Nederland
Gemeten waterstandVlak NAPElke 10 min
The actually measured water level along the Dutch coast and at a few offshore platforms. Not a forecast: the level right now.
RWS voorspellingRijkswaterstaat · Nederland
Verwachting/astronomischVlak NAPElke 3 uur
The official RWS tidal forecast as a curve; in SeaHarbour it takes priority over our own harmonic calculation.
DMI getijDMI · Denemarken
Officiële voorspelling112 stations1× per dag
The official Danish tidal forecast per station. More accurate than our harmonic sum and takes priority.
UK getijEnvironment Agency · Verenigd Koninkrijk
Gemeten waterstandVlak ODN (Newlyn)Elke 15 min
The measured water level of the UK tide-gauge network around the whole coast. Now, not a curve.
FR getijapi-maree.fr / IFREMER-PREVIMER · Frankrijk
VoorspellingVlak LATElke 30 min
Tidal level for 132 French stations, computed from IFREMER/PREVIMER harmonic constituents.
FES2022 / EOT20AVISO / lokaal grid
Harmonische getijgridsWereldwijd / lokaal
Global harmonic tide models. SeaData uses them to compute a tidal curve anywhere, even far from a station.
TICON-4Lokale dataset
Gemeten getijconstantenSeaHarbour
Measured harmonic constants per harbour; the basis for the SeaHarbour tidal forecast where there is no official source.
Observations
AISAISStream
ScheepspositiesContinu (snapshot ~5 s)
Live positions of ships around you, on the map. A separate service maintains the snapshot; the web layer only reads it.
Marine buoysMet Office · Verenigd Koninkrijk
Gemeten golf/wind/weerElk uur
UK measuring buoys and light vessels with wave, wind and weather. Click a buoy for all measured values.
Meetnet Vlaamse BankenVlaamse overheid · België
Gemeten golf/getij/windGetij vlak TAWElke 10 min
The Belgian network: buoys, tide stations and measuring poles for the Flemish coast and banks. Own layer with a shape per type.
UK rain radarMet Office · Verenigd Koninkrijk
NeerslagradarElke 15 min
A transparent precipitation overlay over the UK and southern North Sea.
NOAA SWPCNOAA · Verenigde Staten
RuimteweerSolarNav
Space weather (solar activity, geomagnetic conditions) for the SolarNav module.
