CALIFORNIA — November 5, 2026. Satellite observations are showing unusually warm water moving north along the California coast as a strong El Niño reshapes Pacific conditions. Sea-surface temperatures in parts of Southern California, the Central Coast and the Bay Area have been running roughly 4°C (7°F) above typical levels, while the National Weather Service recently highlighted water temperatures of approximately 65°F to 75°F in a warm-water plume moving north. These measurements were described by SFGATE on November 2, citing NOAA and National Weather Service data. Not every mile of coast is the same temperature or anomaly.
Why warm seawater matters beyond the beach
Unusually high temperatures can affect marine ecosystems, species movement and coastal weather. Warmer water also expands, contributing to higher coastal sea levels. A National Weather Service meteorologist quoted in the report said measured coastal water levels were roughly six inches to one foot above typical levels in affected areas. That figure is an observed regional anomaly, not a prediction that all California shorelines will rise permanently by a foot.
High tides around Thanksgiving and Christmas deserve attention
Coastal communities including San Francisco Bay’s low-lying shoreline, Monterey Bay, Santa Cruz, Newport Beach and the Ventura coast may be especially sensitive when unusually elevated sea levels coincide with astronomical king tides, wind and surf. The National Weather Service warned that additional high-tide events around Thanksgiving and Christmas could bring nuisance or more damaging flooding in susceptible locations. That is a seasonal risk warning, not a November 5 flood alert for every place named here.
How unusual is the marine heat?
NOAA scientists reported that nearly every segment of California’s coast broke at least one marine temperature record during 2026, partly because a marine heat wave preceded the increasingly strong El Niño. The agency’s Integrated Ecosystem Assessment program provides environmental data about the California Current. Broader El Niño conditions are tracked in the NOAA Climate Prediction Center’s diagnostic discussions.
What residents can do now
Property owners and businesses in low-lying coastal areas should review local flood maps, clear private drainage paths where safe, avoid parking in regularly flooded beach lots and sign up for county emergency alerts. Travelers should check Caltrans QuickMap before using coastal roadways during storms. Residents can review NOAA Tides & Currents for the closest water-level station and National Weather Service alerts for official short-term warnings.
California58 has already reported October 27 king-tide flooding on the Balboa Peninsula and coastal road hazards in Orange County. These local examples illustrate exposure, but the November–December impacts are not yet known.
Sources: SFGATE November 2, 2026, report citing NWS Bay Area and NOAA; NOAA Climate Prediction Center and Tides & Currents. Publication date November 5. Forecasts and local flood advisories must be refreshed as conditions change.
Support independent journalism for all Californians
Support reporting, public information and community coverage across California’s 58 counties.
Donate once by card ↗Support California58
Choose how to support California58:
Credit / Debit Card via StripeChoose an amount from $1. One-time support through the publisher's LINKERNO Stripe account.
Continue with PayPal Continue with ZelleZelle payments go to Vitaly Ataev Troshin. Please verify the recipient in your bank before sending. Availability depends on your bank.
Optional reader support. Contributions are not advertised as tax-deductible. Support does not influence editorial decisions.USEFUL SERVICES
Useful services from our ecosystem
AFFILIATED RESOURCE
Travel smarter worldwide
OptionTripAI-powered trip planning for journeys in California and around the world.
Explore OptionTrip →AFFILIATED RESOURCE
Free tax & property tools
TaxesTimeFree preliminary tax and property tools, including the Property Tax Savings Report.
Explore TaxesTime →AFFILIATED RESOURCE
California document support
LegalDocSVCDocument preparation support for self-represented Californians. Not a law firm and not legal advice.
Explore LegalDocSVC →WORK WITH CALIFORNIA58
Have a story, project or partnership idea?
California58 welcomes news tips, interviews, video projects, community partnerships, advertising and other California-focused collaborations.
Work with California58 →
COMMUNITY
Comments
Join the California58 conversation. You must be signed in to comment.
Create a free California58 account or sign in with an available social provider.