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Buoy 46012 Half Moon Bay
Longitude = 122.70W Latitude = 37.45N
FAQs

 

Frequency Analysis - Current Hour
(Swell height in each period/frequency band)
Measurement Date/Time (GMT)12/21
00:00:00
 Wait ...
 Historical Surf Height...Time Lapse Spectral Density... Primary Swell Profile
      

 

Current Swell & Surf Analysis
Buoy 46012
00:00:00 (GMT) on 12/21
Sea Height:13.3 ft
Primary Swell Height: 11.6 ft
Primary Swell Period: 17.0 secs
Surf Height15.8 ft

 

24 Hour Observation

Date
(Month/Day)
Time
(GMT)
Sea Height
[>5 secs]
(ft)
Primary Swell Secondary Swell Tertiary Swell Estimated Surf Height (ft)Primary Period (secs)
Height
(ft)
Period
(secs)
Height
(ft)
Period
(secs)
Height
(ft)
Period
(secs)
12/2100:00:0013.3 11.6 se17.0 secs7.0 se12.7 secs2.9 se 9.2secs15.8 -19.8 17.0
12/2023:00:0012.5 10.9 se16.7 secs8.1 se13.0 secs4.9 se 20.0secs14.7 -18.3 16.7
12/2022:00:0012.3 10.4 se16.7 secs8.0 se12.9 secs4.2 se 20.0secs13.9 -17.3 16.7
12/2021:00:0014.1 11.7 se16.9 secs8.9 se12.8 secs5.2 se 20.0secs15.8 -19.8 16.9
12/2020:00:0014.7 13.0 se16.9 secs6.9 se20.0 secs9.2 se 13.0secs17.7 -22.1 16.9
12/2019:00:0015.7 14.3 se16.7 secs10.7 se13.2 secs6.9 se 20.0secs19.2 -24.0 16.7
12/2018:00:0016.7 14.8 se16.8 secs10.8 se13.0 secs6.5 se 20.0secs19.8 -24.8 16.8
12/2017:00:0017.0 15.2 se16.7 secs10.4 se13.0 secs5.9 se 20.0secs20.4 -25.4 16.7
12/2016:00:0016.1 14.4 se16.5 secs10.3 se13.0 secs4.5 se 20.0secs19.0 -23.7 16.5
12/2015:00:0016.0 14.2 se16.8 secs6.7 se20.0 secs9.8 se 13.0secs19.2 -24.0 16.8
12/2014:00:0015.4 12.9 se16.9 secs6.6 se20.0 secs10.3 se 12.9secs17.5 -21.9 16.9
12/2013:00:0018.2 16.6 se16.8 secs7.0 se20.6 secs10.8 se 13.1secs22.3 -27.9 16.8
12/2012:00:0013.8 11.8 se16.9 secs5.4 se20.0 secs8.2 se 12.9secs15.9 -19.9 16.9
12/2011:00:0014.8 12.7 se17.1 secs7.0 se20.5 secs8.6 se 12.8secs17.4 -21.7 17.1
12/2010:00:0016.5 14.8 se17.3 secs8.3 se20.5 secs8.2 se 12.7secs20.4 -25.5 17.3
12/2009:00:0015.7 14.4 se17.3 secs7.2 se12.8 secs2.6 se 9.3secs20.0 -25.0 17.3
12/2008:00:0013.3 11.5 se17.4 secs8.1 se20.6 secs7.8 se 12.9secs16.0 -20.0 17.4
12/2007:00:0013.3 10.7 se17.3 secs7.6 se20.6 secs8.9 se 12.7secs14.9 -18.6 17.3
12/2006:00:0011.2 8.0 se17.1 secs5.3 se20.8 secs8.5 se 12.7secs10.9 -13.6 17.1
12/2005:00:0011.1 8.3 se17.4 secs6.5 se20.9 secs7.2 se 14.1secs11.5 -14.4 17.4
12/2004:00:0011.2 9.0 se17.3 secs6.7 se21.0 secs7.6 se 12.7secs12.5 -15.6 17.3
12/2003:00:009.9 7.1 se17.5 secs5.7 se20.7 secs7.0 se 12.6secs9.9 -12.4 17.5
12/2002:00:009.8 6.8 se17.0 secs4.7 se21.0 secs7.5 se 12.8secs9.3 -11.6 17.0
12/2001:00:008.3 5.3 se17.0 secs4.1 se20.3 secs6.4 se 12.7secs7.2 -9.0 17.0

 

Surf Height Scale
Size Scale (ft)
>11-22-33-44-55-66-77-88-99-1010-1111-1212-1313-1414-1515-2020-2525-3030-3535-4040-4545+

Swell Period Scal
Period Scale (secs)
6.36.77.17.78.39.11011.112.514.316.7202533.3

 

Current Weather Conditions
Buoy 46012
00:00:00 (GMT) on 12/21
Combined Sea Height:15.4 ft
Dominant Period:16.0 secs
Wind Speed: 7.8 kts
Wind Gust: 9.8 kts
Wind Direction:180 degrees
Barometric Pressure:1022.4 mbs
Air Temperature: 60.4 degrees
Water Temperature:61.5 degrees

 

24 Hour Weather Observation

Date
(Month/Day)
Time
(GMT)
Combined Sea Height (ft)Dominant Period
(secs)
Wind Speed
(kts)
Gust
(kts)
Wind Direction
(degrees)
Barometric Pressure
(mbs)
Air Temperature
(F)
Water Temperature
(F)
12/2100:00:0015.416.07.89.81801022.460.461.5
12/2023:00:0014.117.07.89.82001022.360.361.5
12/2022:00:0013.117.07.89.81901021.660.361.5
12/2021:00:0013.117.05.87.82101021.660.161.5
12/2020:00:0014.817.07.89.82301022.160.161.5
12/2019:00:0015.417.03.95.82201022.160.361.5
12/2018:00:0016.417.03.95.82701022.960.161.5
12/2017:00:0017.417.03.97.83001022.560.161.3
12/2016:00:0017.716.05.89.83001021.759.961.3
12/2015:00:0017.116.05.811.72901020.759.761.3
12/2014:00:0016.717.07.811.72701020.059.561.3
12/2013:00:0016.117.07.811.72701019.859.761.3
12/2012:00:0019.016.09.813.72601019.659.560.6
12/2011:00:0014.817.07.811.72601019.759.560.4
12/2010:00:0015.417.07.811.72501020.159.460.3
12/2009:00:0017.417.07.811.72301019.859.060.4
12/2008:00:0016.417.07.89.82001019.758.860.4
12/2007:00:0014.119.05.87.82001020.058.860.4
12/2006:00:0014.119.01.93.92001020.359.060.6
12/2005:00:0012.113.01.93.91801019.959.060.6
12/2004:00:0012.119.01.95.82001019.458.660.4
12/2003:00:0011.819.01.93.91501019.358.560.4
12/2002:00:0010.821.01.93.93301019.958.660.4
12/2001:00:0010.814.01.93.93601019.758.560.4

 

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