Forecast is updated each 15 of the month. Information on the system and performance assessment can be found in : Jouanno, J., Morvan G., Berline, L., Benshila R., Aumont, O., Sheinbaum, J., Ménard, F. Skillful seasonal forecast of Sargassum proliferation in the Tropical Atlantic. Geophysical Research Letters, 50, e2023GL105545. https://doi.org/10.1029/2023GL105545