California · NWS EKA office

Eureka, CA weather

It is 43°F and clear at Arcata / Eureka, Arcata Airport as of Oct 27, 11:15 PM PDT. Tonight: Mostly Clear, low near 42°F. Forecast from the National Weather Service, issued Oct 27, 2:10 PM PDT.

Updated Oct 27, 11:29 PM PDT (snapshot)

Current conditions

Temperature

43°F

Clear · feels like 41°F

Wind

E 3 mph

Humidity 100% · dew point 43°F

Pressure · visibility

30.13 inHg

Visibility 7 mi

Observed at Arcata / Eureka, Arcata Airport (KACV), Oct 27, 11:15 PM PDT. Station readings can lag or be missing.

Alerts for this area

Coastal Flood Advisory Minor Expected

Coastal Flood Advisory issued October 27 at 2:49PM PDT until October 28 at 3:00PM PDT by NWS Eureka CA

Area
Northern Coastal Humboldt
In effect
Oct 28, 12:00 PM PDT
Until
Oct 28, 3:00 PM PDT
Issued by
NWS Eureka CA
Full text

* WHAT...High astronomical tides will cause minor flooding in low lying areas around Humboldt Bay. Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways. Between 9.0 and 9.3 feet MLLW at the North Spit tide gauge is predicted. * WHERE...Northern Coastal Humboldt County. * WHEN...From noon to 3 PM PDT Wednesday. High tide is at 1:13 PM 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.

What to do: 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.

Around the NWS EKA forecast area

1 active alert covers zones served by the EKA office near Eureka:

  • Coastal Flood Advisory

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Eureka (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM46°FMostly Clear0%N 8 mph
Wed 12 AM47°FMostly Clear0%N 8 mph
Wed 1 AM46°FMostly Clear0%N 8 mph
Wed 2 AM45°FMostly Clear0%NNE 6 mph
Wed 3 AM45°FMostly Clear0%NNE 6 mph
Wed 4 AM43°FMostly Clear0%NNE 6 mph
Wed 5 AM43°FMostly Clear0%NNE 5 mph
Wed 6 AM43°FSunny0%NNE 5 mph
Wed 7 AM42°FSunny0%NNE 5 mph
Wed 8 AM42°FPatchy Fog0%NNE 2 mph
Wed 9 AM46°FPatchy Fog0%NNE 2 mph
Wed 10 AM51°FPatchy Fog0%NNE 2 mph
Wed 11 AM54°FSunny0%NNW 9 mph
Wed 12 PM55°FSunny0%NNW 9 mph
Wed 1 PM56°FSunny0%NNW 9 mph
Wed 2 PM56°FSunny0%NNW 9 mph
Wed 3 PM56°FSunny0%NNW 9 mph
Wed 4 PM55°FSunny0%NNW 9 mph
Wed 5 PM54°FMostly Sunny0%N 7 mph
Wed 6 PM54°FPartly Cloudy0%N 7 mph
Wed 7 PM51°FPartly Cloudy0%N 7 mph
Wed 8 PM49°FPartly Cloudy0%N 6 mph
Wed 9 PM49°FPartly Cloudy0%N 6 mph
Wed 10 PM48°FPartly Cloudy0%N 6 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Eureka can differ.

7-day forecast

Tonight

Low 42°F

Mostly clear, with a low around 42. North northeast wind 5 to 8 mph.

Wednesday

High 56°F·Low 41°F

Patchy fog between 8am and 11am. Sunny, with a high near 56. North wind 2 to 9 mph.

Wednesday Night: Mostly cloudy, with a low around 41. North northeast wind 3 to 7 mph.

Thursday

High 55°F·Low 41°F

Mostly cloudy, with a high near 55. North wind 2 to 7 mph.

Thursday Night: Mostly cloudy, with a low around 41. Northeast wind 3 to 7 mph.

Friday

High 55°F·Low 40°F

Partly sunny, with a high near 55. North northeast wind 1 to 6 mph.

Friday Night: Mostly cloudy, with a low around 40.

Saturday

High 53°F·Low 40°F

A chance of rain after 11am. Mostly cloudy, with a high near 53.

Saturday Night: A chance of rain before 4am. Mostly cloudy, with a low around 40.

Sunday

High 54°F·Low 42°F

Sunny, with a high near 54.

Sunday Night: Partly cloudy, with a low around 42.

Monday

High 58°F·Low 46°F

Partly sunny, with a high near 58.

Monday Night: A slight chance of rain after 4am. Mostly cloudy, with a low around 46.

Tuesday

High 59°F

A chance of rain. Mostly cloudy, with a high near 59.

Nearby cities

Larger cities in the area

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Eureka is served by the National Weather Service EKA forecast office, forecast zone CAZ103, county zone CAC023.
Location used
The Census Bureau's internal point for Eureka (40.7976, -124.1542), in Humboldt County. Population: 25,412 (2024 estimate), number 272 of the 296 California cities on this site.
Radar
Nearest NWS radar: KBHX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/40.7976,-124.1542 (forecast issued Oct 27, 2:10 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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