NOAA Coral Reef Watch will discontinue all operational twice-weekly 50km satellite coral bleaching heat stress monitoring products in April 2020.

These products are being replaced with higher resolution daily 5km satellite products.

Archived 50km data and images will still be available at If you need any assistance, please contact

The 50km-resolution satellite-based coral bleaching heat stress products you are attempting to access are for experimental comparisons with NOAA Coral Reef Watch's next-generation daily global 5km satellite coral bleaching heat stress products.

These 50km satellite products are not up-to-date, lack any ongoing scientific stewardship, and are likely to differ from the daily global 5km satellite products. We discourage their use for management, conservation, and resilience planning applications.

To continue on to the 50km satellite coral bleaching heat stress product web pages, click on the button below: