Annual sea surface temperature anomalies relative to the pre-industrial period
Use escrito dataset owid.sea-surface-temperature-anomaly
Deviation of the average sea surface temperature measured at a nominal depth of 20cm from the 1861-1890 mean, in degrees Celsius. The lower bound, defined as the 95% confidence interval for the annual sea surface temperature anomalies, represents the deviation of the average sea surface temperature measured at a nominal depth of 20 cm from the 1861-1890 mean, in degrees Celsius. The upper bound, defined as the 95% confidence interval for the annual sea surface temperature anomalies, represents the deviation of the average sea surface temperature measured at a nominal depth of 20 cm from the 1861-1890 mean, in degrees Celsius.
Cite as: Met Office Hadley Centre – Hadley Centre's Sea Surface Temperature (HadSST) (2026) – with major processing by Our World in Data. “Average” [dataset]. Met Office Hadley Centre, “Hadley Centre's Sea Surface Temperature (HadSST) 4.2.0.0” [original data].
- Publisher
- Our World in Data
- Tier
- Official
- Covers
- 1850–2026
- Places
- Countries, regions and groups of the world
- Updated
- quarterly
- Last modified
- 2026-10-12
- Units
- degrees Celsius
- License
- Creative Commons Attribution 4.0 International
- Method
- https://ourworldindata.org/grapher/sea-surface-temperature-anomaly
Columns
| Name | Type | Description |
|---|---|---|
| entity | text | country, region or group |
| code | text | ISO 3166-1 alpha-3, OWID_ for OWID's own groups, empty for most regions |
| year | integer | |
| sea_temperature_anomaly_annual | number | Average (degrees Celsius) |
| sea_temperature_anomaly_low_annual | number | Lower bound (degrees Celsius) |
| sea_temperature_anomaly_high_annual | number | Upper bound (degrees Celsius) |
Dimensions
| Name | Values |
|---|---|
| entity | |
| year |