Climate · temperature
The warming spiral
Each turn is a year, each point a month: the departure from the 1951–1980 mean (GISTEMP) moves away from the centre as the planet warms. The spiral draws itself from 1880.
- Year
- —
- Anomaly
- —
Latest GISTEMP month
1.38 °C
Period covered
1880 → 2026
GISTEMP v4 global land-ocean temperature anomaly · NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · 10/23/26
Radius proportional to the GISTEMP v4 monthly anomaly (1951–1980 base); colour from blue (cold) to red (warm).
Latest GISTEMP month
1.38 °C
2026-09
anomaly vs 1951–1980
GISTEMP v4 global land-ocean temperature anomaly · NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · 10/23/26
Warmest GISTEMP month
1.48 °C
2023-09
anomaly vs 1951–1980
GISTEMP v4 global land-ocean temperature anomaly · NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · 10/23/26
Latest month, ocean surface
1.10 °C
2026-09
anomaly vs 1901–2000
Global ocean surface temperature anomaly (NOAA Climate at a Glance, NOAAGlobalTemp) · U.S. Government work, public domain; cite NOAA NCEI · 10/23/26
Warmest month, ocean surface
1.10 °C
2026-09
anomaly vs 1901–2000
Global ocean surface temperature anomaly (NOAA Climate at a Glance, NOAAGlobalTemp) · U.S. Government work, public domain; cite NOAA NCEI · 10/23/26
GISTEMP v4 global temperature anomaly since 1880, yearly mean
GISTEMP v4 global land-ocean temperature anomaly · NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · 10/23/26
Show the data as a table
Monthly anomalies since 1980
GISTEMP v4 global land-ocean temperature anomaly · NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · 10/23/26
Show the data as a table
Ocean surface temperature since 1850, yearly mean
Global ocean surface temperature anomaly (NOAA Climate at a Glance, NOAAGlobalTemp) · U.S. Government work, public domain; cite NOAA NCEI · 10/23/26
Show the data as a table
Method and sources
GISTEMP v4 (NASA GISS) combines GHCN v4 stations with ERSSTv5 SST; anomalies are relative to 1951–1980. Ocean surface temperature comes from NOAAGlobalTemp (NCEI, Climate at a Glance), relative to 1901–2000. The base periods differ, so values are not directly comparable between series.
Yearly means are computed on the server from the available months; the current year is partial.
Reading these data
Global anomalies carry an uncertainty of about ±0.05 °C for recent decades and more before 1950 (Lenssen et al., 2024). The files are revised every month.
SOURCES OF THIS PAGE
- GISTEMP v4 global land-ocean temperature anomaly
-
GISTEMP Team (2026). GISS Surface Temperature Analysis (GISTEMP), version 4. NASA Goddard Institute for Space Studies; Lenssen et al. (2024).
· doi:10.1029/2023JD040179 · source page ↗
Licence : NASA data, public domain; cite GISTEMP Team and Lenssen et al. (2024) · retrieved on Oct 23, 2026 · SHA-256 4c64eda288bc… - Global ocean surface temperature anomaly (NOAA Climate at a Glance, NOAAGlobalTemp)
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NOAA National Centers for Environmental Information, Climate at a Glance: Global Time Series, ocean surface temperature anomaly (NOAAGlobalTemp), base period 1901–2000.
· source page ↗
Licence : U.S. Government work, public domain; cite NOAA NCEI · retrieved on Oct 23, 2026 · SHA-256 a73f9d2780ea… - Lenssen et al. (2024)
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Lenssen, N., Schmidt, G. A., Hendrickson, M., Jacobs, P., Menne, M., & Ruedy, R. (2024). A GISTEMPv4 observational uncertainty ensemble. Journal of Geophysical Research: Atmospheres, 129, e2023JD040179.
· doi:10.1029/2023JD040179
Licence : Published literature; cited