Notice: CRW's twice-weekly 50 km products will update around 2 pm on Mondays and Thursdays (U.S. Eastern Time) starting from 1 February 2016, using a new 50 km SST analysis. Click here to see details.
50-km Sea Surface Temperature Anomaly
clickable global map of SST anomalies
anomalies in Mediterranean and Red Sea anomalies around India anomalies east of Japan anomalies around Hawaii anomalies around Central America anomalies West of Africa anomalies in Mediterranean and Red Sea anomalies around southern Africa anomalies in the southern Indian Ocean anomalies around Australia anomalies in the South Pacific anomalies west of South America anomalies east of Brazil anomalies around southern Africa
Click on the image to zoom in.

Current images: Global | E.Hem. | W.Hem. | Pacific | Caribbean | Coral Triangle

Data Formats Available

images Image Archives
Regional imagery and image archives from OSDPD.
Google Earth Google Earth
All of our satellite data products are available on Google Earth.
Virtual Stations 50-km Virtual Stations
Imagery, graphs, ASCII data, and e-mail alerts for reef pixels around the world.
animations Animations
Data animations and downloadable animated GIF files from OSDPD.
HDF data HDF data files
Raw data in Hierarchical Data Format (HDF), with free NOAA viewing software.

The NOAA Coral Reef Watch (CRW) twice-weekly 50-km Sea Surface Temperature (SST) Anomaly product displays the difference between today's SST and the long-term average. The scale goes from -5 to +5 °C. Positive numbers mean the temperature is warmer than average; negative means cooler than average.

Additional description in the 50-km products tutorial.
Technical details on the methodology page and in Liu et al. 2013.