LA NIÑA CONDITIONS ARE PRESENT IN THE TROPICAL PACIFIC
10 October 2025
DOST-PAGASA S & T Media Service
10 October 2025, Quezon City,
LA NIÑA CONDITIONS ARE PRESENT IN THE TROPICAL PACIFIC
Periods of cooler than average sea surface temperatures (SSTs) in the equatorial Pacific Ocean that started in August 2025 continue to persist and further strengthened reaching La Niña conditions threshold of -0.5°C sea surface temperature anomaly (SSTA) in September 2025, as shown by the recent oceanic and atmospheric indicators. La Niña condition exist if a one-month SSTA of -0.5°C or less is observed and an expectation that the 3-month SSTA (Oceanic Niño Index) of -0.5°C or less will be met (i.e., September-October-November (SON), December-January-February (DJF)). It is likely that La Niña conditions will continue at least until DJF 2025-2026 season as suggested by several climate models.
With this development, higher chances of above normal rainfall in October 2025 to February 2026 are expected, most especially along the eastern section of the country. This can be due to increased chance of tropical cyclone activity within the Philippine Area of Responsibility (PAR) and combinations of rain-bearing weather systems, which may cause floods, flashfloods and rain-induced landslides in susceptible areas.
PAGASA will continue to monitor the country's weather and climatic conditions. Meanwhile, the public and all concerned agencies are advised to monitor relevant PAGASA information regularly.
For more information, please call the Climate Monitoring and Prediction Section (CLIMPS), Climatology and Agrometeorology Division (CAD) at telephone number (02) 8284-0800 local 4920 and 4921 or through email: pagasa.climps@gmail.com.
Original Signed:
NATHANIEL T. SERVANDO, Ph.D.
Administrator