What is the threat facing Malibu's coastline?

Malibu's 21-mile coastline is at great risk from the impacts of rising sea levels, including tidal inundation, shoreline erosion, storm flooding, and wave run-up.

How high are sea levels expected to rise in Malibu by 2070-75?

Sea levels are projected to be 2.5 feet higher in Malibu by 2070-75, potentially wiping out the famous Pacific Coast Highway in a major storm.

What adaptation measures is Malibu planning to combat the effects of climate change?

Malibu is planning to present adaptation and mitigation measures next year, including structural elevation, dune restoration, and coastal armoring.

Home / Environment / Malibu Coastline Faces Grave Threat from Rising Sea Levels by 2070

Malibu Coastline Faces Grave Threat from Rising Sea Levels by 2070

18 Nov, 2025

•

Summary

Malibu's 21-mile coastline at risk from tidal inundation, erosion, flooding
Pacific Coast Highway and septic systems particularly vulnerable
Adaptation measures like elevation, dune restoration planned for 2026

Malibu Coastline Faces Grave Threat from Rising Sea Levels by 2070

According to a comprehensive coastal vulnerability assessment conducted in late 2025, Malibu's 21-mile coastline is at great risk from the impacts of rising sea levels over the next 45 years. The report, prepared by Environmental Science Associates, predicts that tidal inundation, shoreline erosion, storm flooding, and wave run-up will significantly affect the area as sea levels rise up to 6.6 feet by 2070-75.

The assessment identified four major areas of vulnerability: residential and commercial development, septic systems in low-lying areas, the famous Pacific Coast Highway, and the city's already narrow beaches. With sea levels projected to be 2.5 feet higher by 2070-75, the iconic highway could be wiped out in a major storm, and septic systems will be at high risk as groundwater rises.