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Record high ocean temperatures off southern California raise fears of prolonged marine heatwave

Researchers warn the high-pressure conditions could disrupt marine life and ecosystems if it continues Sign up for the Breaking News US email to get newsletter alerts in your inbox For more than a century, shoreline…

1 report1 sourceApr 4, 2026, 12:00 PM
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The GuardianApr 4, 2026, 12:00 PM

Record high ocean temperatures off southern California raise fears of prolonged marine heatwave

Researchers warn the high-pressure conditions could disrupt marine life and ecosystems if it continues Sign up for the Breaking News US email to get newsletter alerts in your inbox For more than a century, shoreline stations operated by the Scripps Institution of Oceanography have measured water temperatures along the California coast. This year, they are flashing a warning sign. Over the last three months, several stations have repeatedly posted record-breaking daily high temperatures – with the La Jolla station registering temperatures a full 10F above historical average at one point last month. Continue reading...

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