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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
Coverage Global ocean
Resolution 0.25° (~28km)
License Free open access (NOAA)
Update Daily

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.

Sea surface temperature monitoring El Nino/La Nina analysis Marine ecosystem studies Fisheries management

How to download

  1. 1 Open the NOAA OISST data page.
  2. 2 Select the desired time range.
  3. 3 Download daily NetCDF files.
  4. 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.