Los Angeles Sets Coastal Flooding Record With 12 Days in 2026

Los Angeles has recorded 12 days of coastal flooding in 2026, exceeding the previous annual high of nine days, set in 1983. The record comes from observations at the San Pedro tide gauge, where measurements began in 1923. NOAA’s online data had not yet incorporated October’s readings, and Kavanaugh said the annual total could rise further.

Preliminary data also shows record numbers of flooding days at tide gauges in San Diego, La Jolla and Santa Barbara. Readings in Santa Monica, Port San Luis and Monterey rank among their 10 highest. Kavanaugh said the current flooding is unusual because it has occurred without a tropical cyclone or major storm.

She attributed the elevated water levels to several overlapping influences: unusually high astronomical tides, warm water, an El Niño-related Kelvin wave and long-term sea-level rise. In the past several weeks, the Kelvin wave arrived along California’s coast and may lift water heights six to 12 inches over several weeks, she said. Warm water expands, while global sea levels have risen about two inches over recent decades.

Kavanaugh said the high-risk periods around Thanksgiving and Christmas coincide with the moon’s closest approach to Earth, which strengthens its gravitational pull and produces especially high tides. Another Kelvin wave pulse could add to flooding, though the severity of future events cannot yet be predicted. Forecast models become useful closer to an event, generally within seven days or less.

She advised coastal residents to follow local officials and National Weather Service advisories, make preparations in advance and avoid parking in low-lying areas. Sandbags may be needed again if flooding returns in the following weeks.