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Station 46012 (LLNR 325) - HALF MOON BAY - 24NM SSW of San Francisco, CA Image indicating link to RSS feed of recent meteorological observations for station 46012

Owned and maintained by National Data Buoy Center
Data provided by @Orchard
Uncrewed Surface Vehicle
DataXplorer
37.356 N 122.881 W (37°21'20" N 122°52'51" W)

Site elevation: sea level
Air temp height: 1.3 m above site elevation
Anemometer height: 1.3 m above site elevation
Barometer elevation: 1.3 m above mean sea level
Sea temp depth: 0.2 m below MLLW
Water depth: 208.8 m
Watch circle radius: 20253.7 yards

Previous data provided by Saildrone for this station are available at:
SD-1073 (1801589) -- 0000Z, 9/1/23 to 2359Z, 4/25/24 and 2000Z, 5/8/25 to 0000Z, 8/4/25
SD-1077 (1801593) -- 1200Z, 7/27/24 to 1959Z, 5/8/25
SD-1063 (1801583) -- 0000Z, 4/26/24 to 0330Z, 7/24/24.

Latest NWS Marine Forecast

Important Notice to Mariners

Search And Rescue (SAR) Data

Meteorological Observations from Nearby Stations and Ships Image indicating link to RSS feed of recent meteorological observations near station 46012

Regional HF Radar Surface Current Observations

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red diamond Stations with no data in last 8 hours
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Station 46012

Conditions at 46012 as of
(6:00 am PDT)
1300 GMT on 08/19/2026:
     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

5-day plot - Wind Direction Wind Direction (WDIR):WNW ( 300 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 5.8 kts
5-day plot - Wind Gust Wind Gust (GST): 7.8 kts
5-day plot - Wave Height Wave Height (WVHT): 4.6 ft
5-day plot - Dominant Wave Period Dominant Wave Period (DPD): 7 sec
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES):29.98 in
5-day plot - Pressure Tendency Pressure Tendency (PTDY):+0.00 in ( Steady )
5-day plot - Air Temperature Air Temperature (ATMP): 57.0 °F
5-day plot - Water Temperature Water Temperature (WTMP): 59.0 °F
5-day plot - Dew Point Dew Point (DEWP): 56.5 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 7.8 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 7.8 kts
5-day plot - Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
Previous observations
TIME
(PDT)		 5-day plot - Wind Direction
WDIR
 		 5-day plot - Wind Speed
WSPD
kts		 5-day plot - Wind Gust
GST
kts		 5-day plot - Wave Height
WVHT
ft		 5-day plot - Dominant Wave Period
DPD
sec		 5-day plot - Average Wave Period
APD
sec		 5-day plot - Mean Wave Direction
MWD
 		 5-day plot - Atmospheric Pressure
PRES
in		 5-day plot - Pressure Tendency
PTDY
in		 5-day plot - Air Temperature
ATMP
°F		 5-day plot - Water Temperature
WTMP
°F		 5-day plot - Dew Point
DEWP
°F		 5-day plot - Salinity
SAL
psu		 5-day plot - Visibility
VIS
nmi		 5-day plot - Tide (above MLLW)
TIDE
ft
2026-08-19 05:00 amWNW 7.8 9.7 4.9 7--29.98-0.01 57.9 59.0 57.2---
2026-08-19 04:00 amWNW 7.8 9.7 4.6 7--29.97-0.03 57.9 58.8 57.2---
2026-08-19 03:00 amWNW 7.8 9.7 4.9 7--29.97-0.04 57.7 58.8 57.0---
2026-08-19 02:00 amWNW 7.8 11.7 4.6 7--29.99-0.03 57.7 59.0 57.0---
2026-08-19 01:00 am NW 9.7 11.7 4.3 8--30.00-0.02 57.6 59.0 56.8---
2026-08-19 12:00 am NW 9.7 13.6 4.3 8--30.01-0.01 57.6 59.0 57.0---
2026-08-18 11:00 pm NW 11.7 13.6 4.3 7--30.02+0.00 57.6 59.0 56.8---
2026-08-18 10:00 pm NW 13.6 15.5 4.3 7--30.02-0.01 57.6 59.4 57.0---
2026-08-18 09:00 pm NW 13.6 17.5 3.6 7--30.02+0.00 57.6 59.5 57.0---
2026-08-18 08:00 pm NW 13.6 15.5 3.6 7--30.02-0.01 57.7 60.1 56.8---
2026-08-18 07:00 pmWNW 11.7 13.6 3.3 7--30.03-0.01 57.9 60.3 57.0---
2026-08-18 06:00 pmWNW 13.6 15.5 3.3 7--30.03-0.02 57.9 60.1 56.8---
2026-08-18 05:00 pmWNW 11.7 13.6 3.0 8--30.03-0.03 58.5 60.3 57.2---
2026-08-18 04:00 pmWNW 11.7 13.6 3.3 8--30.04-0.04 58.5 60.6 57.2---
2026-08-18 03:00 pm NW 9.7 11.7 3.3 7--30.05-0.05 58.5 60.6 57.2---
2026-08-18 02:00 pm NW 9.7 11.7 3.3 7--30.07-0.03 58.1 60.6 57.4---
2026-08-18 01:00 pm NW 9.7 11.7 3.3 7--30.09-0.01 57.9 60.1 57.0---
2026-08-18 12:00 pm NW 9.7 11.7 3.3 7--30.10+0.01 57.6 60.1 56.7---
2026-08-18 11:00 amWNW 9.7 11.7 3.6 7--30.10+0.03 57.4 59.7 56.5---
2026-08-18 10:00 amWNW 5.8 7.8 3.3 7--30.10+0.04 57.0 59.2 56.1---
2026-08-18 09:00 amWNW 7.8 9.7 3.6 9--30.09+0.03 57.0 58.8 56.1---
2026-08-18 08:00 am NW 7.8 11.7 3.6 7--30.07+0.02 57.4 58.8 56.5---
2026-08-18 07:00 am NW 7.8 9.7 3.6 6--30.06+0.00 57.4 58.8 56.5---
2026-08-18 06:00 amWNW 7.8 9.7 3.6 6--30.06+0.00 57.4 58.8 56.5---
Wave Summary
for 46012 as of (6:00 am PDT)
1300 GMT on 08/19/2026:

These wave data are displayed in rounded times.

     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

5-day plot - Significant Wave Height Significant Wave Height (WVHT): 4.6 ft
5-day plot - Wave Steepness Wave Steepness (STEEPNESS): STEEP
Previous observations
TIME
(PDT)		 5-day plot - Wave Height
WVHT
ft		 5-day plot - Swell Height
SwH
ft		 5-day plot - Swell Period
SwP
sec		 5-day plot - Swell Direction
SwD
 		 5-day plot - Wind Wave Height
WWH
ft		 5-day plot - Wind Wave Period
WWP
sec		 5-day plot - Wind Wave Direction
WWD
 		 5-day plot - Wave Steepness
STEEPNESS
 		 5-day plot - Average Wave Period
APD
sec
2026-08-19 05:00 am 4.9--N/A-- N/A AVERAGE-
2026-08-19 04:00 am 4.6--N/A-- N/A STEEP-
2026-08-19 03:00 am 4.9--N/A-- N/A STEEP-
2026-08-19 02:00 am 4.6--N/A-- N/A AVERAGE-
2026-08-19 01:00 am 4.3--N/A-- N/A AVERAGE-
2026-08-19 12:00 am 4.3--N/A-- N/A AVERAGE-
2026-08-18 11:00 pm 4.3--N/A-- N/A STEEP-
2026-08-18 10:00 pm 4.3--N/A-- N/A STEEP-
2026-08-18 09:00 pm 3.6--N/A-- N/A AVERAGE-
2026-08-18 08:00 pm 3.6--N/A-- N/A AVERAGE-
2026-08-18 07:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 06:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 05:00 pm 3.0--N/A-- N/A AVERAGE-
2026-08-18 04:00 pm 3.0--N/A-- N/A AVERAGE-
2026-08-18 03:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 02:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 01:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 12:00 pm 3.3--N/A-- N/A AVERAGE-
2026-08-18 11:00 am 3.6--N/A-- N/A STEEP-
2026-08-18 10:00 am 3.3--N/A-- N/A STEEP-
2026-08-18 09:00 am 3.6--N/A-- N/A N/A-
2026-08-18 08:00 am 3.6--N/A-- N/A AVERAGE-
2026-08-18 07:00 am 3.6--N/A-- N/A STEEP-
2026-08-18 06:00 am 3.6--N/A-- N/A STEEP-