This tool provides different metrics related to sea surface temperature (SST) and marine heatwaves (MHW) in MPAs of the Mediterranean Sea and the east-central Atlantic. Projections are for the period 2006 to 2100 for two Representative Concentration Pathways (RCP): 4.5 and 8.5, and were obtained from Copernicus Climate Change Service, DOI: 10.24381/cds.dcc9295c. Marine protected area delimitations were obtained from the World Database of Protected Areas (WDPA). Marine heatwave metrics and Sea Surface Temperatre estimation follow Hobday et al. (2018) in R with package MarineHeatWaves. Hobday, Alistair J., et al. *Categorizing and naming marine heatwaves*. Oceanography 31.2 (2018): 162-173. UNEP-WCMC and IUCN (2025), Protected Planet: The World Database on Protected Areas (WDPA) [Online], April 2025, Cambridge, UK: UNEP-WCMC and IUCN. Copernicus Climate Change Service, Climate Data Store, (2020): Marine biogeochemistry data for the Northwest European Shelf and Mediterranean Sea from 2006 up to 2100 derived from climate projections. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/cds.dcc9295c (Accessed on March 2025)