World’s Fourth Mass Coral Bleaching Event Likely Ended in 2025
6/7/2026 - By nesdis.noaa.gov, nesdis.noaa.gov. After analyzing satellite data and bleaching observations, NOAA’s experts say the record-breaking fourth global coral bleaching event likely concluded in mid-2025. The fourth global coral bleaching event was confirmed by NOAA on April 15, 2024. From early-2023 to mid-2025, bleaching-level heat stress impacted 84% of the world’s coral… SEE MORE
![Coral bleaching at Cheeca Rocks in the Florida Keys in 2023. [Credit: NOAA]](https://www.usharbors.com/wp-content/uploads/2026/06/NOAA_Cheeca-Rocks_07312023_7-e.jpg-660x400.webp)








