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Beryl A AWS wave buoy daily means for Apr 2018

Daily means from the Beryl A AWS wave buoy for Apr 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

697 wave-buoy observations covered all 30 days. Typical wave height was 4.9 ft (10th–90th percentile 3–7.9 ft), while mean reported wave period; measurement type unavailable was 5.4 seconds (10th–90th percentile 4–6 seconds). Typical wind was 12.8 mph (10th–90th percentile 8.1–24.2 mph). 28 of 2,788 checked values (1%) were excluded by quality control. Across 4 comparable years, mean wave height was below the same-month mean of 6.8 ft and mean wave period was below the same-month mean of 5.9 seconds.

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

Typical Wave Height

4.9ft
Mean: 5.1 ft
P10–P90: 3 — 7.9 ft
Recorded extremes

0 — 13.1 ft

Available for 690 of 697 hourly samples

Mean Wave Period

5.4secs
P10–P90: 4 — 6secs
Recorded extremes

3 — 7secs

Available for 676 of 697 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 697 hourly samples

Typical Wind

Variable, 12.8mph
Mean: 14.7 mph
P10–P90: 8.1 — 24.2 mph
Recorded extremes

0 — 39.1 mph

Circular concentration: 10%

Compared With Previous Aprils

Historical baseline from 2,833 observations across 4 years.

Wave Height
5.1ft
1.7ft below mean
Historical mean 6.8ft
Wave Period
5.4s
0.5s below mean
Historical mean 5.9s
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 Apr 2018Last observation shown
Metric
Mean wave height (ft)368776957552542366533865545445
Mean observed period(s)5Reported6Reported6Reported6Reported6Reported6Reported6Reported6Reported6Reported7Reported7Reported6Reported6Reported5Reported5Reported4Reported5Reported6Reported5Reported5Reported4Reported6Reported5Reported5Reported6Reported6Reported6Reported6Reported5Reported5Reported
Mean wave power(kW/m)------------------------------
Mean wind directionNWconcentration 89%NEconcentration 93%ENEconcentration 93%Nconcentration 91%NWconcentration 96%SSWconcentration 48%Sconcentration 96%ENEconcentration 57%Nconcentration 99%ENEconcentration 87%Econcentration 96%ESEconcentration 90%ESEconcentration 93%SEconcentration 89%SEconcentration 94%SSEconcentration 96%Sconcentration 98%SSWconcentration 97%SSWconcentration 88%Wconcentration 88%WSWconcentration 66%SSEconcentration 95%SWconcentration 94%Wconcentration 95%WSWconcentration 88%SWconcentration 94%WNWconcentration 95%NWconcentration 93%Nconcentration 93%NNEconcentration 99%
Mean wind speed (mph)9101713191821121381011141510172619201113281812121011101219
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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