regional SST time series

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Status: most recent available file from NOAA NCEI is for 13 June 2026.

Daily SSTs in the Niño 3.4 region:


SST monitoring regions available on this page* as of 6 April 2026:



*includes conventional tropical monitoring regions in the North Atlantic (MDR = main development region):

• full MDR (10-20°N, 85-20°W)
• Caribbean MDR (10-20°N, 85-60°W)
• eastern MDR (10-20°N, 60-20°W)

These plots show area-averaged sea surface temperature (SST) from the daily NOAA optimum interpolated SST (OISST) dataset. Black dashed line depicts the 1991-2020 long-term average. Thin gray lines correspond with individual years from 1982 through 2023. 2024 is plotted in orange. 2025 is plotted in red. 2026 (so far) is plotted in blue.

Dashed box on inset map denotes the region for area averaging. The shading on the map corresponds with that day's anomalies. All anomalies are computed relative to the daily 1991-2020 mean. Click any image to reach the full-sized file. Typically updated by 1600 UTC (for the previous day) assuming no delays in SST data.

Note 1: adding tropical-mean relative SST values is still a work in progress; thank you for your patience.
Note 2: data not updated on February 29 during leap years.

 

 

 

 

 

 

 

 



Data source: NOAA PSL OISST