Water Temperature of Humboldt Bay in Eureka, CA

Current Water Temperature

51.8°F

Measurement Time: Tuesday, December 30, 2025, 2:12 PM PST

Today's Tides

Low: December 30, 12:37 AM, 2.9 ft
 High: December 30, 7:17 AM, 7.9 ft
Low: December 30, 2:35 PM, -0.1 ft
 High: December 30, 9:15 PM, 4.9 ft

Temperature Locations

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Local Points of Interest

Samoa Dunes Recreational Area; Mike Thompson Wildlife Area; South Bay; Rosewood, CA; Elk River, CA

Humboldt Bay

Station Name: North Spit
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 0 feet

Sensor Depth: -4 feet

Nearest Address:
New Navy Base Rd
Eureka, CA 95521
Humboldt County

GPS Coordinates: 40.76630, -124.21720

Nearby Water Temperatures

Pacific Ocean, Manila, CA (11.6 mi)
Pacific Ocean, Eureka, CA (16.3 mi)
Trinity River, Hoopa, CA (34.5 mi)
Pacific Ocean, Petrolia, CA (42.3 mi)
Klamath River, Orleans, CA (51.4 mi)
Klamath River, Klamath, CA (52.9 mi)
Trinity River, Helena, CA (57.7 mi)
Trinity River, Douglas City, CA (66.5 mi)
Crescent Harbor, Crescent City, CA (67.7 mi)
Trinity River, Lewiston, CA (74.2 mi)
Elder Creek, Branscomb, CA (77.7 mi)
East Fork Russian River, Ukiah, CA (119.7 mi)
Mill Creek, Los Milinos, CA (125.4 mi)
Deer Creek, Vina, CA (130.2 mi)
Arena Cove, Point Arena, CA (130.7 mi)

Weather for Eureka, California

Current Weather

°F
Sunny
Sunny
83%
°F
°F
mph
mph
°F
millibars
°F
%
0 in
0%
mi
1.1

Five Day Weather Forecast

Sunny
Tue
H: 58°F
L: 43°F
Moderate rain
Wed
H: 50°F
L: 48°F
Moderate rain
Thu
H: 55°F
L: 49°F
Moderate rain
Fri
H: 54°F
L: 51°F
Moderate rain
Sat
H: 48°F
L: 44°F

Best Times for Fishing or Hunting

Major Periods

3:18 AM - 5:48 AM
8:32 PM - 11:02 PM

Minor Periods

12:52 AM - 2:22 PM
3:06 AM - 4:36 AM

Action Rating: 2 out of 5

Frost Advisory issued December 30 at 3:16AM PST until December 30 at 9:00AM PST by NWS Eureka CA

Effective: Tue December 30, 2025, 3:16 AM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Northern Humboldt Coast. * WHEN...Until 9 AM PST this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Hydrologic Outlook issued December 29 at 9:26PM PST by NWS Eureka CA

Effective: Mon December 29, 2025, 9:26 PM
Expires: Tue December 30, 2025, 2:45 PM

ESFEKA A series of atmospheric rivers will bring an increased risk for urban and small stream flooding late this week and into this weekend. The first round of rain will arrive Wednesday night into Thursday and provide generally light to moderate rainfall amounts. Locally heavy rain is expected in the King Range. This initial period of rain will set the stage for a more intense rainstorm expected to arrive Friday into Friday night. Current indications are for the heaviest rainfall to occur during the day on Friday into Friday night. The greatest risk for small stream flooding will occur during this time period and probably continue into Saturday after heavy rain has ended due to the lag in rainfall run-off. Road closures will be possible. At this point, the area of greatest concern is in southern Humboldt and northwest Mendocino counties. Small rivers, streams and creeks such as Elk river, Jacoby creek and Mattole river could exceed their banks and flood area roads. Southern Mendocino and Lake counties may also experience heavy rain and road flooding will be possible. Mainstem rivers will also likely rise sharply and will need to be monitored for possible flood stage exceedance. Be on the lookout for watches, advisories and warning as this next heavy rain event unfolds. Stay alert and remember to never attempt to drive through water covered roads. Water may be moving much faster than you think.


Tuesday, December 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 48.1°F
Average Humidity: 79%
Chance of Rain: 0%
Wind: 5.4 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 6.53 μg/m3
Carbon Monoxide: 243.21 μg/m3
Nitrogen Dioxide: 13.55 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 37.36 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:19 AM
Sunset: 4:59 PM
Daylight: 9 hrs 18 mins
Moonrise: 1:22 PM
Moon Transit: 9:02 PM
Moonset: 3:36 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

3:18 AM - 5:48 AM
8:32 PM - 11:02 PM

Minor Periods

12:52 AM - 2:22 PM
3:06 AM - 4:36 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 49.1°F
Average Humidity: 82%
Chance of Rain: 78%
Wind: 5.6 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 6.09 μg/m3
PM10: 6.65 μg/m3
Carbon Monoxide: 240.53 μg/m3
Nitrogen Dioxide: 15.74 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 32.2 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:20 AM
Sunset: 4:59 PM
Daylight: 9 hrs 19 mins
Moonrise: 2:06 PM
Moon Transit: 10:05 PM
Moonset: 4:56 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
12:00 AM - 12:00 AM

Minor Periods

1:36 PM - 3:06 PM
4:26 AM - 5:56 AM

Action Rating: 2 out of 5

Thursday, January 1, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 52.1°F
Average Humidity: 93%
Chance of Rain: 89%
Wind: 6.5 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 6.57 μg/m3
PM10: 7.13 μg/m3
Carbon Monoxide: 265.73 μg/m3
Nitrogen Dioxide: 12.35 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 41.88 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:20 AM
Sunset: 5:00 PM
Daylight: 9 hrs 19 mins
Moonrise: 3:02 PM
Moon Transit: 11:12 PM
Moonset: 6:14 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
12:00 AM - 12:00 AM

Minor Periods

2:32 PM - 4:02 PM
5:44 AM - 7:14 AM

Action Rating: 4 out of 5

Friday, January 2, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 52.4°F
Average Humidity: 89%
Chance of Rain: 83%
Wind: 21.3 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 2.74 μg/m3
PM10: 3.07 μg/m3
Carbon Monoxide: 131.53 μg/m3
Nitrogen Dioxide: 4.28 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 65.96 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:21 AM
Sunset: 5:01 PM
Daylight: 9 hrs 20 mins
Moonrise: 4:10 PM
Moon Transit: 12:00 AM
Moonset: 7:23 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:30 AM - 9:00 AM

Minor Periods

3:40 PM - 5:10 PM
6:53 AM - 8:23 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 48.3°F
Average Humidity: 89%
Chance of Rain: 86%
Wind: 17.4 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 2.07 μg/m3
PM10: 2.32 μg/m3
Carbon Monoxide: 126.25 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 100.69 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:21 AM
Sunset: 5:02 PM
Daylight: 9 hrs 21 mins
Moonrise: 5:26 PM
Moon Transit: 12:18 AM
Moonset: 8:20 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:34 AM - 10:04 AM

Minor Periods

4:56 PM - 6:26 PM
7:50 AM - 9:20 AM

Action Rating: 6 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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