Click on map above to zoom to small 60 x 40-degree tiles; use drop-down menu below to view larger 60 x 40-degree tiles.
Right-click outside clickable map area to save the image.
60 x 40-degree tiles (by east/west hemispheres and low/high latitudes, updated daily)
The NOAA Coral Reef Watch (CRW) daily global 5km satellite year-to-date record-breaking coral
bleaching Degree Heating Week (DHW) product presented here shows the locations where maximum
daily DHWs so far during the current year have exceeded their historical maximum daily DHWs
over the period of 1985-2025 and the magnitudes of their excursions above the
historical maximum values.
Note that the baseline time period for the historical maximum will change at the beginning of
every year to include one more year.
This product is updated each afternoon at about 13:30 U.S. Eastern Time.
