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File: Ocean--Monthly--Difference-from-average-Sea-Surface-Temperature--Pacific--2026-09-00--1200px-2.jpg

Shaded-globe style map of the Pacific Ocean showing very warm sea surface temperatures in September 2026

Pacific Ocean surface temperatures in September 2026 compared to the 1991-2020 average. The extremely warm waters across the equator (dark red) are one indicator of a strengthening El Niño event. Climate.us image, based on NOAA OISST data.