The Pacific ENSO Update is a bulletin of the Pacific El Niño-Southern Oscillation (ENSO) Applications Climate (PEAC) Center, providing information on climate variability related to the ENSO climate cycle for the U.S.-Affiliated Pacific Islands (USAPI). The newsletter is intended to supply information for the benefit of those involved in such climate-sensitive sectors as civil defense, resource management, and developmental planning in the various jurisdictions of the USAPI. 

The site offers access to a sign-up form to receive updates via email. An archive of past newsletters is also available.