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The content presented on this webpage is made possible by NOAA, which is funded by U.S. taxpayer dollars appropriated by Congress. Despite no laws being passed by Congress to amend that spending, NOAA is one of many federal agencies being decimated by workforce cuts. Hundreds of firings took place on 27 February 2025. NOAA was already understaffed, and these cuts will further limit their ability to serve the public.Note 1: NCEI websites were offline for weeks due to Hurricane Helene's devastation in Asheville, NC, and the surrounding region. Their infrastructure was restored to the point of providing data on 15 October 2024.
Note 2: NOAA data may no longer be freely available depending on decisions made after 20 January 2025. If we lose free access to OISST (and other critical data sources provided by NOAA), these plots will cease production.
- regional SST time series charts
- latest per-sector SST values
- regional SST anomaly time series charts
- additional ocean monitoring resources
- by request (limited availability)
regional SST time series
These plots show area-averaged sea surface temperature (SST) from the daily NOAA optimum interpolated SST (OISST) dataset. Black line depicts the 1991-2020 long-term average. Thin gray lines correspond with individual years from 1982 through 2022. 2023 is plotted in red. 2024 is plotted in orange. 2025 (so far) is plotted in blue.Dashed box on inset map denotes region for area averaging. Anomalies are computed relative to the daily 1991-2020 mean. Click any image to reach the full-sized file. Updated around 1600 UTC for the previous day assuming no delays in SST data. (Note: not updated on February 29 during leap years.)
Status: most recent available file from NCEI is for 19 Apr 2025.
Sectors:
- North Atlantic: 10-50°N, 60-20°W (excludes Gulf of Mexico, Caribbean Sea, much of the Gulf Stream)
- Tropical Atlantic: 10-20°N, 60-20°W
- Gulf of Mexico: 23-29°N, 97-83°W
- Caribbean Sea: 10-20°N, 85-60°W
- Atlantic main development region (MDR): 10-20°N, 85-20°W
- eastern Eastern North Pacific (ENP-east): 10-20°N, 130-96°W
- western Eastern North Pacific (ENP-west): 10-20°N, 166-130°W
- western North Pacific (WNP): 7-22°N, 110-160°E
- North Indian Ocean (NIO): 0-22.5°N, 51-98.5°E
Data source: NOAA PSL OISST
Regional SST values on 19 Apr [°C]:
| 1991-2020 | 2025 | anomaly | |
|---|---|---|---|
| North Atlantic | 19.31 | 19.56 | +0.25 |
| tropical Atlantic | 24.93 | 24.86 | -0.07 |
| Gulf of Mexico | 24.20 | 24.67 | +0.47 |
| Caribbean Sea | 27.13 | 27.68 | +0.55 |
| Atlantic MDR | 25.71 | 25.87 | +0.16 |
| eastern ENP | 26.45 | 26.38 | -0.07 |
| western ENP | 25.12 | 25.25 | +0.13 |
| western North Pacific | 27.97 | 28.63 | +0.66 |
| North Indian Ocean | 29.51 | 29.91 | +0.40 |
| South Atlantic | 20.52 | 20.90 | +0.38 |
regional SST anomaly time series
These plots show SST anomalies, or the difference between the given date's SST and that date's average value (shown by the black line in the regional SST time series provided above). Thin gray lines correspond with individual years from 1982 through 2022. 2023 is plotted in red. 2024 is plotted in orange. 2025 (so far) is plotted in blue.Dashed box on inset map denotes region for area averaging. Anomalies are computed relative to the daily 1991-2020 mean. Click any image to reach the full-sized file. Updated around 1400-1430 UTC for the previous day assuming no delays in SST data. (Note: not updated for February 29 during leap years.)
Additional ocean monitoring resources
- Ocean heat content from Brian McNoldy at the University of Miami
- SST maps and time series from Alex Boreham (CyclonicWx)
- SST time series from the Climate Reanalyzer at the University of Maine
- SST and SST anomaly maps from NOAA PSL
- SST maps and time series from Levi Cowan (TropicalTidbits)
- ENSO monitoring from NOAA
- NOAA CoastWatch portal (offers a wealth of ocean and coastal resources)
Special requests
