The Swedish Meteorological and Hydrological Institute is the expert advisory body for the Swedish Government on meteorology, climatology, hydrology and oceanography under the auspices of the Ministry of Climate and Enterprise. SMHI is the leading producer of oceanographic data in Sweden, and one of the major producers in the Baltic region. Marine data production includes regional climate simulations (including biogeochemistry), operational warnings for sea level, waves and currents, oil spill tracking and support, sea ice monitoring and prediction, algal bloom tracking and warning using satellite remote sensing, ship-based eutrophication and biodiversity monitoring as well as managing the national observing networks for sea level, waves and hydrographic conditions using caissons and buoys. The Oceanographic Unit of SMHI is the National Oceanographic Data Centre, NODC, within IOC/IODE. SMHI created and maintains the national databank SHARK (Swedish Ocean Archive) and through its involvement in EUMETSAT is a key stakeholder in remote sensing data & information management. SMHI is the Copernicus In Situ Thematic Centre for the Baltic sea region. SMHI acts as national data host for many marine biological data types except fish related. SMHI has long had a presence on the web, offering oceanographic data for free download since 2002 and now offering a variety of products for forecasting, real/near-real time and delayed mode applications. SMHI represents Sweden in EUMETSAT, IOC-IODE, JCB of WMO-IOC, and ICES-DIG, and provides expert support to the Swedish Agency for Marine and Water Management in the Marine Conventions (HELCOM and OSPAR). SMHI is partner in SeaDataNet AISBL and the data & information management EU-projects EMODnet, Jerico S3, Copernicus Marine, LandSeaLot, AQUARIUS, Blue Cloud 2026.