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Cormorant AWS wave buoy daily means for Apr 2021

Daily means from the Cormorant 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 6.6 ft (10th–90th percentile 3.3–18.9 ft), while mean reported wave period; measurement type unavailable was 6.9 seconds (10th–90th percentile 5–9 seconds). Typical wind was 16.1 mph (10th–90th percentile 6.9–34.4 mph). 3 of 2,424 checked values (0.1%) were excluded by quality control. Across 7 comparable years, mean wave height was above the same-month mean of 7.6 ft and mean wave period was above the same-month mean of 6.5 seconds.

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

Typical Wave Height

6.6ft
Mean: 9.5 ft
P10–P90: 3.3 — 18.9 ft
Recorded extremes

2 — 38.7 ft

Available for 604 of 606 hourly samples

Mean Wave Period

6.9secs
P10–P90: 5 — 9secs
Recorded extremes

3 — 13secs

Available for 605 of 606 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 606 hourly samples

Typical Wind

N, 16.1mph
Mean: 18.3 mph
P10–P90: 6.9 — 34.4 mph
Recorded extremes

2.2 — 48.3 mph

Circular concentration: 41%

Compared With Previous Aprils

Historical baseline from 4,920 observations across 7 years.

Wave Height
9.5ft
1.9ft above mean
Historical mean 7.6ft
Wave Period
6.9s
0.4s above mean
Historical mean 6.5s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Cormorant 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 Cormorant AWS wave buoy

Cormorant AWS (WMO 63112) 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; the parameters available through the international feed depend on the platform's installed sensors.

Metrics are rows; days run left to right.
Cormorant AWS wave buoy daily means Apr 2021Last observation shown
Metric
Mean wave height (ft)6871629342013161691075346866106544344QC rejected5
Mean observed period(s)6Reported6Reported6Reported8Reported11Reported12Reported10Reported8Reported8Reported9Reported8Reported7Reported7Reported6Reported6Reported5Reported6Reported7Reported6Reported6Reported7Reported7Reported7Reported7Reported6Reported5Reported5Reported5Reported5Reported5Reported
Mean wave power(kW/m)------------------------------
Mean wind directionNNWconcentration 92%Nconcentration 99%WNWconcentration 92%NWconcentration 84%Nconcentration 99%Nconcentration 98%Nconcentration 94%WSWconcentration 73%Nconcentration 98%NNWconcentration 95%NEconcentration 95%NNEconcentration 95%Nconcentration 82%NWconcentration 83%WSWconcentration 85%SSWconcentration 99%SSWconcentration 98%SSWconcentration 98%SSWconcentration 99%Wconcentration 78%NNWconcentration 94%NNWconcentration 81%NNEconcentration 74%NNEconcentration 98%NNWconcentration 53%Econcentration 38%ENEconcentration 98%NEconcentration 96%ENEconcentration 98%NEconcentration 97%
Mean wind speed (mph)152017354040242526201219138714141918172611899917142213
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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