"The strongest El Niño signal still looks more likely later in 2026 than at winter's opening, so June behaves more like a bridge month than a fully mature event."
"Waters around the South Island were already running warmer than average at the end of March, especially off the west coast at +0.78°C and the east coast at +0.40°C."
"Warm water adds moisture to passing systems, which can help snowfall totals when the air mass is cold enough, and it also nudges marginal snow levels upward early in the season."
"The winter signal is there, but it probably takes a little time to organize."
Winter 2026 in New Zealand is characterized by a transition towards El Niño, with warm subsurface water accumulating in the equatorial Pacific. June is anticipated to be a bridge month rather than a fully developed El Niño event. The atmosphere remains unsettled, with lingering La Niña effects. Warmer ocean temperatures around New Zealand, particularly off the coasts, are expected to influence moisture levels and snowfall. The seasonal pattern suggests a shift from easterly to southeasterly and southwesterly flows as the season progresses.
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