NOAA OISST Sea Surface Temperature
NOAA OISST provides daily global sea surface temperature at ~28km resolution from 1981-present, blending satellite and in-situ observations.
Format
NetCDF
Geometry
Raster (sea surface temperature)
Coverage
Global ocean
Resolution
0.25° (~28km)
About this dataset
NOAA daily Optimum Interpolation Sea Surface Temperature (OISST) at 0.25° resolution from 1981-present.
NOAA OISST (Optimum Interpolation Sea Surface Temperature) provides daily global sea surface temperature data at 0.25° (~28km) resolution from September 1981 to present. It blends satellite observations (AVHRR, AMSR, VIIRS) with in-situ measurements from buoys and ships using optimum interpolation to produce a consistent, gap-free SST record.
How to download
- 1 Open the NOAA OISST data page.
- 2 Select the desired time range.
- 3 Download daily NetCDF files.
- 4 Process with Python/xarray or open in QGIS for SST analysis.
FAQ
How is OISST different from other SST products?
OISST uses optimum interpolation which fills gaps in satellite coverage using in-situ data, providing a complete global SST field every day. It is the most widely used SST dataset for climate and ocean studies.
What is the resolution of OISST?
The standard OISST product is at 0.25° (~28km at equator). A higher-resolution 0.05° product based on GHRSST is also available.