SAN FRANCISCO 18NM West of San Francisco, CA (46026)

Conditions for Sunday

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Marine Data Graph

Current Weather/Wave Observations

Air Temperature: 55° F
Wind direction (W Dir): South (175 - 184 Degrees)
Wind Speed (W Spd): 1.9 kts (2.2 mph)
Wind Gust (W Spd): 3.9 kts (4.5 mph)
Dominant Wave Period (DWP): 11 sec
Dominant Wave Height (DWH): 6.89 ft
Dominant Wave Range (DWR): exactly 6.9 ft
Wind Wave Period (WWP): 3 sec
Wind Wave Height (WWH): 1.64 ft
Wind Wave Range (WWR): 0.82 - 2.46 ft
Wave Swell Period (WSP): 11 sec
Wave Swell Height (WSH): 6.56 ft
Wave Swell Range (WSR): 5.74 - 7.38 ft
Atmospheric Pressure (AP): 30.05 in
Pressure Tendency (PT): +0.03 in
Increasing, then steady; or increasing, then increasing more slowly

Updated: 10:50 AM PST on December 17, 2017

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Current Wave Detail Observations

Water Depth: 174 ft
Wave Height: 6.89 ft
Spectral Peak Period: 11.4 sec
Average Wave Period: 7.2 sec
Sampling Interval: 0.6 sec
Wave Record: 2400 sec

Updated: 11:00 AM PST on December 17, 2017

General Information

Location: 37.755 North -122.839 West
Buoy Type: 3-meter discus buoy
Buoy Hull: 3D24
Payload: AMPS payload
Owned by: NDBC
Windspeed: Measured by obtained from anemometer
Sea Surface: Measured by Intake

Weather and Wave Data

Time Temp Humidity Wind Dominant Wave Wind Wave Wave Swell Pressure
  Air
(°F)
Water
(°F)
  Dir Speed
(kts)
Speed
(mph)
Period
(sec)
Height
(ft)
Range
(ft)
Period
(sec)
Height
(ft)
Range
(ft)
Period
(sec)
Height
(ft)
Range
(ft)
Atmo.
(in)
Tend.
(in)
21:50 55 54
-
NNW 19.4 22.4 11 9.84 exactly 9.8 8 6.56 5.74 - 7.38 11 8.20 7.38 - 9.02 29.97 -0.01
23:50 54 54
-
NNW 11.7 13.4 10 8.20 exactly 8.2 6 3.28 2.46 - 4.10 10 8.20 7.38 - 9.02 29.99 +0.01
00:50 55 54
-
North 17.5 20.1 13 7.55 exactly 7.5 7 4.92 4.10 - 5.74 13 6.56 5.74 - 7.38 29.98 +0.01
01:50 55 54
-
NNW 11.7 13.4 11 7.87 exactly 7.9 5 3.28 2.46 - 4.10 11 6.56 5.74 - 7.38 29.99 -
03:50 55 54
-
NNW 9.7 11.2 11 7.55 exactly 7.5 4 1.64 0.82 - 2.46 11 6.56 5.74 - 7.38 29.99 +0.01
05:50 55 54
-
NW 5.8 6.7 11 7.55 exactly 7.5 3 1.64 0.82 - 2.46 11 6.56 5.74 - 7.38 30.01 +0.02
06:50 55 54
-
NW 7.8 8.9 11 7.22 exactly 7.2 4 1.64 0.82 - 2.46 11 6.56 5.74 - 7.38 30.01 +0.02
08:50 55 54
-
West 3.9 4.5 12 7.55 exactly 7.5 4 1.64 0.82 - 2.46 12 8.20 7.38 - 9.02 30.04 +0.03
09:50 56 54
-
- 0.0 0.0 12 6.89 exactly 6.9 4 1.64 0.82 - 2.46 12 6.56 5.74 - 7.38 30.06 +0.04
10:50 55 55
-
South 1.9 2.2 11 6.89 exactly 6.9 3 1.64 0.82 - 2.46 11 6.56 5.74 - 7.38 30.05 +0.03

Detailed Wave Spectra

Time Water Depth Wave Height Spectral Peak Period Average Wave Period Sampling Interval Wave Record
20:00 174 ft 10.07 ft 10.0 sec 7.3 sec 0.6 sec 2400 sec
22:00 174 ft 9.88 ft 11.4 sec 7.2 sec 0.6 sec 2400 sec
00:00 174 ft 8.23 ft 10.0 sec 6.9 sec 0.6 sec 2400 sec
02:00 174 ft 7.84 ft 10.8 sec 7.5 sec 0.6 sec 2400 sec
03:00 174 ft 8.50 ft 10.8 sec 7.6 sec 0.6 sec 2400 sec
08:00 174 ft 7.97 ft 11.4 sec 7.4 sec 0.6 sec 2400 sec
09:00 174 ft 7.58 ft 12.1 sec 7.3 sec 0.6 sec 2400 sec
10:00 174 ft 6.96 ft 12.1 sec 6.9 sec 0.6 sec 2400 sec
11:00 174 ft 6.89 ft 11.4 sec 7.2 sec 0.6 sec 2400 sec