El Nino Weather Pattern 2025. The el niño pattern has officially been active since june 2023, but noaa's climate prediction center now reports that the pattern is weakening, with an 85% chance of a switch. The pattern shifts back and forth irregularly.

The latest forecast expects la niña to follow by late this summer or fall. La niña is a natural climate pattern that influences global weather marked by cooler than average ocean temperatures in the equatorial pacific.