Below-average sea surface temperatures (SSTs) continued across the central and eastern equatorial Pacific Ocean during September [Fig. 1]. Most of the Niño indices decreased during the past month, with the latest weekly index values spanning -0.8°C to -1.6°C [Fig. 2]. For the last couple of months, negative subsurface temperature anomalies remained mostly unchanged [Fig. 3], reflecting the persistence of below-average temperatures across the eastern Pacific Ocean [Fig. 4]. Low-level easterly wind anomalies and upper-level westerly wind anomalies prevailed across most of the equatorial Pacific. Convection was suppressed over the western and central tropical Pacific and was enhanced over Indonesia [Fig. 5]. Overall, the coupled ocean-atmosphere system continued to reflect La Niña.