About BayCast data
BayCast presents Australian offshore conditions assembled from public-domain and openly-licensed sources. Required attributions and licence terms are below.
Sea surface temperature
Sea surface temperature data is derived from the IMOS GHRSST product family (Group for High Resolution SST), produced by the Bureau of Meteorology and distributed via the Australian Ocean Data Network (AODN).
- Smooth · 9 km · daily — IMOS GHRSST L4 RAMSSA (Regional Australian Multi-Sensor SST Analysis), 9 km gap-filled daily Australian product.
- High detail · 2 km · 3-day — IMOS GHRSST L3SM (multi-sensor), ~2 km native resolution.
Licence: Creative Commons Attribution 4.0 (CC BY 4.0).
IMOS is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent. Source: imos.org.au · Distribution: thredds.aodn.org.au.
Ocean currents
Ocean current vectors (water_u, water_v at the surface) come from the US Navy HYCOM ESPC-D-V02 ocean forecast model (Global 1/12° hindcast/forecast).
Distribution: U.S. Department of Defense, Distribution Statement A — Approved for public release; distribution is unlimited. Attribution is requested but not required.
Funding for the development of HYCOM has been provided by the National Ocean Partnership Program and the Office of Naval Research. Source: hycom.org · Distribution: tds.hycom.org.
Crosshair point readout
The live point readout under the crosshair (sea-surface temperature and ocean current at the exact map centre) is served by Open-Meteo, which combines GHRSST and HYCOM-derived inputs.
Licence: CC BY 4.0. Source: open-meteo.com.
Base map tiles
Place names and coastlines are © OpenStreetMap contributors, rendered as the "Positron" (light) and "Dark Matter" (dark) basemap styles by CARTO. OpenStreetMap data is available under the Open Database Licence (ODbL); CARTO basemap tiles are free for commercial and non-commercial use under their basemap terms.
The "Depth shading" toggle uses the Esri ArcGIS Online "Ocean Base" layer at low opacity for bathymetric texture. Source: esri.com.
Open-source software
- Leaflet — © Vladimir Agafonkin and contributors. BSD-2-Clause.
- leaflet-velocity — animated current/wind streamlines. MIT.
Updated 2026-05-09. Questions? Email [email protected].