Sea Surface Temperature Anomalies: Daily Interactive Charts
Daily sea surface temperature (SST) anomaly data for the North Atlantic and the global ocean, plotted as deviation from the 1982–2010 climatological baseline. The year-by-year charts let you compare individual years directly; the long-term trend charts show the continuous record from 1981 to today, with a 365-day rolling average to reveal the underlying warming signal. Updated 18 Aug 2026
Year-by-Year Anomaly Comparison
Each line represents one full year of daily SST anomalies (°C relative to the 1982–2010 mean), plotted by day of year so all years can be compared directly on the same axis. The most recent years are listed first in the legend.
North Atlantic (0°N–60°N)
Daily anomalies from 1981 to 2026 — hover a line to identify the year.
World (60°S–60°N)
Daily anomalies from 1981 to 2026 for the global ocean.
Long-term Warming Trend
The continuous daily record from 1981 to today, displayed as a single unbroken time series. The light blue line shows individual daily readings; the bold red line is the 365-day rolling average, which filters out seasonal variation and reveals the underlying warming trend.
North Atlantic — Long-term Trend
World — Long-term Trend
Birkel, S.D. 'Daily Sea Surface Temperature', Climate Reanalyzer (ClimateReanalyzer.org), Climate Change Institute, University of Maine, USA. Accessed 18 August 2026.