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Updated:November 13, 2026 5:15 am PST

High Surf Warning HIGH SURF WARNING  
Humboldt County

  Effective: Thu, 11/12 10:21pm Severity:  Moderate 
  Updated: November 13, 2026 5:15 am Urgency: Expected
  Expires: Fri, 11/13 7:00am Certainty: Likely

Areas Affected: Northern Coastal Humboldt
 
Alert Details:
* WHAT...For the High Surf Warning, Dangerously large breaking
waves 30 to 35 feet. For the Coastal Flood Advisory, High
astronomical tides will cause minor flooding in low lying areas
around Humboldt Bay. 1.5 to 2.2 feet of saltwater inundation
above ground level is possible near shorelines and tidal
waterways. Between 8.7 and 8.9 feet MLLW at the North Spit tide
gauge is predicted.

* WHERE...Northern Coastal Humboldt County.

* WHEN...For the High Surf Warning, from 1 PM Friday to 4 AM PST
Sunday. For the Coastal Flood Advisory, from 11 AM to 3 PM PST
Friday. High tide is at 1:04pm at the Humboldt Bay North Spit
tide gauge. Saltwater inundation will be possible 1 to 2 hours
before and after high tide.

* IMPACTS...Flooding of low lying areas around Humboldt Bay
including parks and roads with only isolated closures
expected. Flooding will likely impact Jackson Ranch Road in
the Arcata Bottoms and several roads in King Salmon. Breaking
waves can sweep people off jetties and docks, and into
dangerous seas. Life- threatening surf conditions and
significant beach erosion can be expected.

* ADDITIONAL DETAILS...While astronomical tides are decreasing
each day, persistent southerly winds are aiding in raising water
levels for Humboldt Bay. The beginning of a very large incoming
swell could enhance coastal flooding if they overlap, but they
aren't anticipated to do so or will not overlap for long. After
only brief improvement in high swell late Saturday through
Sunday, a second large swell is forecast late Sunday through
Monday.

Information:
A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.

Large breaking waves along the coast will lead to increased wave
run-up on beaches with waves topping and washing over large rocks
and jetties. These large waves can be erratic and unpredictable.
Use extra caution near the surf zone as these large waves will be
capable of sweeping people into the frigid and turbulent ocean
water. Mariners traversing the bar are urged to exercise extreme
caution or stay in port until the threat subsides. Please contact
the U.S. Coast Guard for information regarding harbor and bar
closures.
High Surf Warning HIGH SURF WARNING  
Humboldt County

  Effective: Thu, 11/12 10:21pm Severity:  Moderate 
  Updated: November 13, 2026 5:15 am Urgency: Expected
  Expires: Fri, 11/13 7:00am Certainty: Likely

Areas Affected: Southwestern Humboldt - Coastal Mendocino
 
Alert Details:
* WHAT...Dangerously large breaking waves 30 to 40 feet.

* WHERE...Southwestern Humboldt and Coastal Mendocino Counties.

* WHEN...From 4 PM Friday to 4 AM PST Sunday. .

* IMPACTS...Breaking waves can sweep people off jetties and
docks, and into dangerous seas. Life-threatening surf
conditions and significant beach erosion can be expected.

* ADDITIONAL DETAILS...After only brief improvement late
Saturday through Sunday, a second large swell is forecast late
Sunday through Monday.

Information:
Large breaking waves along the coast will lead to increased wave
run-up on beaches with waves topping and washing over large rocks
and jetties. These large waves can be erratic and unpredictable.
Use extra caution near the surf zone as these large waves will be
capable of sweeping people into the frigid and turbulent ocean
water. Mariners traversing the bar are urged to exercise extreme
caution or stay in port until the threat subsides. Please contact
the U.S. Coast Guard for information regarding harbor and bar
closures.
Coastal Flood Advisory COASTAL FLOOD ADVISORY  
Humboldt County

  Effective: Thu, 11/12 10:21pm Severity: Minor
  Updated: November 13, 2026 5:15 am Urgency: Expected
  Expires: Fri, 11/13 7:00am Certainty: Likely

Areas Affected: Northern Coastal Humboldt
 
Alert Details:
* WHAT...For the High Surf Warning, Dangerously large breaking
waves 30 to 35 feet. For the Coastal Flood Advisory, High
astronomical tides will cause minor flooding in low lying areas
around Humboldt Bay. 1.5 to 2.2 feet of saltwater inundation
above ground level is possible near shorelines and tidal
waterways. Between 8.7 and 8.9 feet MLLW at the North Spit tide
gauge is predicted.

* WHERE...Northern Coastal Humboldt County.

* WHEN...For the High Surf Warning, from 1 PM Friday to 4 AM PST
Sunday. For the Coastal Flood Advisory, from 11 AM to 3 PM PST
Friday. High tide is at 1:04pm at the Humboldt Bay North Spit
tide gauge. Saltwater inundation will be possible 1 to 2 hours
before and after high tide.

* IMPACTS...Flooding of low lying areas around Humboldt Bay
including parks and roads with only isolated closures
expected. Flooding will likely impact Jackson Ranch Road in
the Arcata Bottoms and several roads in King Salmon. Breaking
waves can sweep people off jetties and docks, and into
dangerous seas. Life- threatening surf conditions and
significant beach erosion can be expected.

* ADDITIONAL DETAILS...While astronomical tides are decreasing
each day, persistent southerly winds are aiding in raising water
levels for Humboldt Bay. The beginning of a very large incoming
swell could enhance coastal flooding if they overlap, but they
aren't anticipated to do so or will not overlap for long. After
only brief improvement in high swell late Saturday through
Sunday, a second large swell is forecast late Sunday through
Monday.

Information:
A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.

Large breaking waves along the coast will lead to increased wave
run-up on beaches with waves topping and washing over large rocks
and jetties. These large waves can be erratic and unpredictable.
Use extra caution near the surf zone as these large waves will be
capable of sweeping people into the frigid and turbulent ocean
water. Mariners traversing the bar are urged to exercise extreme
caution or stay in port until the threat subsides. Please contact
the U.S. Coast Guard for information regarding harbor and bar
closures.
Wind Advisory WIND ADVISORY  
Humboldt County

  Effective: Thu, 11/12 10:24pm Severity:  Moderate 
  Updated: November 13, 2026 5:15 am Urgency: Expected
  Expires: Fri, 11/13 7:00am Certainty: Likely

Areas Affected: Interior Del Norte - Northern Coastal Humboldt - Southwestern Humboldt - Northeastern Interior Humboldt - Southeastern Interior Humboldt
 
Alert Details:
* WHAT...South winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Humboldt County, and Interior Del Norte.

* WHEN...Until 1 PM PST Friday.

* IMPACTS...Wind gusts will be particularly strong along windward
ridges and exposed coastal headlands. Gusty winds will blow around
unsecured objects. Tree limbs could be blown down and a few power
outages may result.

* ADDITIONAL DETAILS...Winds will be strong aloft and may mix down to
the surface, resulting in wind advisory conditions.

Information:
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Secure outdoor objects.