HISTORICAL SEA SURFACE TEMP TRENDS

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Sea surface temperature anomaly vs. tropical cyclone activity, 2015–2025.

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Avg Sea Temp (2024)

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Avg Anomaly (2024)

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10yr Trend

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Storms (2024)

Bar Colors

Below Avg (< −0.8°C)

Slightly Cool (−0.8 to −0.3°C)

Near Avg (−0.3 to +0.3°C)

Above Avg (+0.3 to +1.0°C)

Well Above (+1.0°C+)

Sea Surface Temp vs. Named Storms

Bars = temperature anomaly vs. seasonal baseline. Line = named storm count. Warm bars up, cool bars down.

Sea Surface Temp vs. Hurricanes

Bars = temperature anomaly vs. seasonal baseline. Line = hurricane/typhoon count.

Sea Surface Temp vs. Major Hurricanes

Bars = temperature anomaly vs. seasonal baseline. Line = Category 3+ storm count.

Data: NOAA OI SST V2.1 via ERDDAP for sea surface temperatures. NOAA NHC, JTWC, and WMO for tropical cyclone counts. Anomalies computed against 1991–2020 WMO standard climatology. *2025 North Indian Ocean cyclone counts are preliminary estimates.