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Beryl A AWS wave buoy daily means for Jan 2018

Daily means from the Beryl A AWS wave buoy for Jan 2018, including available wave height, period, direction, wind and sea temperature data.

Last observation shown

Data available:  to 

Monthly means for

Latest

Period Summary

Programmatically generated summary. Hog Says

739 wave-buoy observations covered all 31 days. Typical wave height was 9.5 ft (10th–90th percentile 5.6–16.4 ft), while mean reported wave period; measurement type unavailable was 6.9 seconds (10th–90th percentile 6–8 seconds). Typical wind was 19.7 mph (10th–90th percentile 6.9–38 mph). 34 of 2,956 checked values (1.2%) were excluded by quality control. Across 4 comparable years, mean wave height was below the same-month mean of 12.4 ft and mean wave period was below the same-month mean of 7.1 seconds.

Generated only from the observations and comparisons shown on this page.

Typical Wave Height

9.5ft
Mean: 10.4 ft
P10–P90: 5.6 — 16.4 ft
Recorded extremes

3.9 — 27.2 ft

Available for 722 of 739 hourly samples

Mean Wave Period

6.9secs
P10–P90: 6 — 8secs
Recorded extremes

5 — 10secs

Available for 722 of 739 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 739 hourly samples

Typical Wind

SW, 19.7mph
Mean: 20.9 mph
P10–P90: 6.9 — 38 mph
Recorded extremes

0 — 51.9 mph

Circular concentration: 39%

Compared With Previous Januarys

Historical baseline from 2,913 observations across 4 years.

Wave Height
10.4ft
2ft below mean
Historical mean 12.4ft
Wave Period
6.9s
0.2s below mean
Historical mean 7.1s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Beryl A AWS. Use the table on this page for a text version of the same measurements. To open hourly observations, use a linked day name in the table.

About Beryl A AWS wave buoy

Beryl A AWS (WMO 63110) is an automatic weather station on a privately operated oil platform in the northern North Sea. It is not a free-floating wave buoy. The station provides offshore meteorological observations for operations and forecasting, with available parameters determined by the platform's installed sensors.

Metrics are rows; days run left to right.
Beryl A AWS wave buoy daily means Jan 2018Last observation shown
Metric
Mean wave height (ft)869810139101514771418191310765512111410711QC rejected101112
Mean observed period(s)7Reported6Reported7Reported8Reported8Reported7Reported6Reported7Reported8Reported8Reported6Reported5Reported7Reported8Reported9Reported8Reported8Reported7Reported6Reported7Reported6Reported7Reported7Reported7Reported7Reported7Reported7Reported8Reported6Reported6Reported7Reported
Mean wave power(kW/m)-------------------------------
Mean wind directionNNWconcentration 87%Variableconcentration 23%Econcentration 70%ENEconcentration 77%NEconcentration 84%Nconcentration 95%Wconcentration 90%SSWconcentration 95%SSEconcentration 98%SEconcentration 98%Sconcentration 96%SSEconcentration 98%SSEconcentration 99%Sconcentration 100%SWconcentration 82%WSWconcentration 97%WSWconcentration 82%Wconcentration 94%WSWconcentration 85%Variableconcentration 15%SSEconcentration 67%Sconcentration 85%SSWconcentration 86%SWconcentration 73%Wconcentration 78%NWconcentration 58%SSWconcentration 86%Wconcentration 95%WNWconcentration 89%WSWconcentration 86%WSWconcentration 95%
Mean wind speed (mph)13131671623202238321326384324211391161326253113122929242520
Mean water temperature(°C)-------------------------------

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Wave metric colour key

Colours move through the scale as each number increases. They do not by themselves mean that conditions are good, safe or suitable for you.

Wave & swell height0–40+ ft
Wave & swell period0–22+ s
Wind speed0–75 mph

The displayed numbers remain the source of truth; colour is an additional visual cue.

Which wave period is shown?

The table shows the best period measurement supplied for each observation. It is not necessarily the energy period used to calculate wave power.

Tp
Peak period: the period at the strongest spectral peak.
Tavg
The provider's average wave period.
Tm02
A mean period calculated from the wave spectrum.
Tz
Mean zero-crossing period.
Reported
A legacy value whose period type was not recorded.
Mixed
A daily or monthly mean containing more than one period type.

Wave power needs a genuine energy period (Te). SurfHog does not substitute Tp, Tavg, Tm02 or Tz when Te is missing.

What does buoy wave power mean?

kW/m means kilowatts of wave power per metre of wave crest. It describes the rate at which the observed sea state carries energy past the buoy.

Unlike the shore-directed forecast value, buoy wave power is the total power at the observation point. It is not projected towards a particular beach and does not predict breaking wave height.

In deep water, wave power can be calculated with:

P is approximately 0.49 times significant wave height squared times wave energy period.

P is power in kW/m, Hs is significant wave height in metres, and Te is wave energy period in seconds.

  • Provider-reported power is used when available.
  • Otherwise, a value is calculated only when both significant height and a genuine energy period are available. The ≈ symbol marks calculated values.
  • A dash is shown instead of substituting peak, Tm02, zero-crossing or other period measurements.
  • Daily and monthly figures use the mean of hourly-normalized observation power values; they are not calculated from mean height and period.

Wave direction, spectrum, water depth and local bathymetry still matter. Wave power is best read alongside height, period and direction rather than as a standalone surf-quality score.

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