The Spanish-Portuguese Assembly of Geodesy and Geophysics, which held its first meeting in Almería in 1998, began meeting every two years, alternating between the two countries responsible, Spain and Portugal. Over the course of its sessions, it has established itself as a research forum in the fields of Geodesy, Seismology, Meteorology, Geomagnetism, Hydrology, Oceanography, Volcanology, Applied Geophysics, and Cryospheric Sciences, as well as a place for meeting and scientific exchange between Spanish and Portuguese researchers through the presentation and discussion of papers in these fields. The COVID-19 period marked the largest gap in the established periodicity, which we now wish to resume. Thus, two years after the last meeting, which took place in Évora in 2024, the 2026 meeting will be held in Spain. Next June, from the 16th to the 19th, Universidad Politécnica de Madrid and its Higher Technical School of Topography, Geodesy, and Cartography will host the 12th Spanish-Portuguese Assembly of Geodesy and Geophysics.