2024-08-19 00:00:00 POSEIDON System app provides easy access to the updated view of the meteorological, wave, hydrodynamic and ecosystem forecasts provided in POSEIDON System official website poseidon.hcmr.gr. The forecasts are updated daily covering the next five days. Meteo Forecast: Spatial coverage: mid and South Europe, Mediterranean Sea and North Africa • Surface wind (10m)