Skip to content
Surfhog home
Menu

Beryl A AWS wave buoy daily means for Apr 2021

Daily means from the Beryl A AWS wave buoy for Apr 2021, 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

606 wave-buoy observations covered all 30 days. Typical wave height was 5.9 ft (10th–90th percentile 3–18 ft), while mean reported wave period; measurement type unavailable was 6.3 seconds (10th–90th percentile 5–9 seconds). Typical wind was 15 mph (10th–90th percentile 6.9–32.9 mph). 10 of 2,424 checked values (0.4%) were excluded by quality control. Across 7 comparable years, mean wave height was above the same-month mean of 6.4 ft and mean wave period was above the same-month mean of 5.8 seconds.

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

Typical Wave Height

5.9ft
Mean: 8.3 ft
P10–P90: 3 — 18 ft
Recorded extremes

0 — 31.5 ft

Available for 602 of 606 hourly samples

Mean Wave Period

6.3secs
P10–P90: 5 — 9secs
Recorded extremes

4 — 11secs

Available for 601 of 606 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 606 hourly samples

Typical Wind

NNW, 15mph
Mean: 17 mph
P10–P90: 6.9 — 32.9 mph
Recorded extremes

0 — 46.1 mph

Circular concentration: 44%

Available for 605 of 606 hourly samples

Compared With Previous Aprils

Historical baseline from 4,944 observations across 7 years.

Wave Height
8.3ft
1.9ft above mean
Historical mean 6.4ft
Wave Period
6.3s
0.5s above mean
Historical mean 5.8s
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 2021Last observation shown
Metric
Mean wave height (ft)5761224291912151391085334445QC rejected654423565
Mean observed period(s)5Reported5Reported6Reported7Reported9Reported11Reported9Reported8Reported8Reported8Reported8Reported7Reported6Reported5Reported6Reported5Reported5Reported6Reported6Reported5Reported6Reported6Reported6Reported6Reported5Reported4Reported5Reported5Reported5Reported5Reported
Mean wave power(kW/m)------------------------------
Mean wind directionNNWconcentration 91%NNWconcentration 95%NWconcentration 92%WNWconcentration 83%NNWconcentration 96%NNWconcentration 96%NNWconcentration 96%WSWconcentration 86%NWconcentration 97%NWconcentration 98%Nconcentration 83%Nconcentration 99%NNWconcentration 93%NWconcentration 96%NEconcentration 57%Sconcentration 96%SSEconcentration 96%Sconcentration 99%Sconcentration 99%WSWconcentration 77%NNWconcentration 97%NWconcentration 94%NNWconcentration 88%NNEconcentration 96%Nconcentration 80%Sconcentration 64%NNEconcentration 53%NNEconcentration 98%NNEconcentration 96%NNEconcentration 98%
Mean wind speed (mph)142115323838262526148231313411913141725131091188141716
Mean water temperature(°C)------------------------------

Swipe sideways to see more days.

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.

› Wave Buoy List