WMO Forecasts for Winter 2025-2026

The Hydrometeorological and Monitoring Center has published the World Meteorological Organization's (WMO) forecasts for the winter of 2025-2026.

From August to October 2025, sea surface temperatures in the global ocean have continued to remain above average, particularly warming in the northern part of the Pacific Ocean. Meanwhile, air temperatures in the equatorial region have decreased slightly, although overall seasonal averages have remained within nearly zero deviation limits. A slight decline in El Niño indices has also been observed in other regions.

Despite these various anomalies, weak interactions characteristic of La Niña have been maintained between the ocean and atmosphere, which are most prominently expressed through precipitation anomalies.

The forecasts indicate that ocean surface temperature anomalies will weaken during the winter of 2025-2026, corresponding to conditions of weak La Niña influence. It is expected that air temperatures in the western Pacific region will remain above average, which will maintain the east-west thermal contrast and strengthen the atmospheric processes characteristic of La Niña in the equatorial region.