How warming spread across the Pacific

Across 21 Pacific Island countries and territories, cooler years have become rarer as warming spread.

Reading 3,696 annual observations…

coolerwarmer· colour = anomaly, °C

Choose a place

How to read

Each column is a year; each mark a place. Above the line is warmer than the historical average, below is cooler. Move through the chart to inspect a year; tap a mark or choose an island to follow one place.

Data source

Annual sea-surface-temperature anomalies for 21 Pacific Island countries and territories, 1850–2025. Source: Pacific Data Hub.