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Cormorant AWS wave buoy daily means for Dec 2021

Daily means from the Cormorant AWS wave buoy for Dec 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

716 wave-buoy observations covered all 31 days. Typical wave height was 10.5 ft (10th–90th percentile 5.9–19.4 ft), while mean reported wave period; measurement type unavailable was 7.5 seconds (10th–90th percentile 6–9 seconds). Typical wind was 20.8 mph (10th–90th percentile 6.9–35.8 mph). 4 of 2,864 checked values (0.1%) were excluded by quality control. Across 8 comparable years, mean wave height was below the same-month mean of 13 ft and mean wave period was below the same-month mean of 7.6 seconds.

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

Typical Wave Height

10.5ft
Mean: 11.4 ft
P10–P90: 5.9 — 19.4 ft
Recorded extremes

3.3 — 26.9 ft

Available for 714 of 716 hourly samples

Mean Wave Period

7.5secs
P10–P90: 6 — 9secs
Recorded extremes

5 — 12secs

Available for 714 of 716 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 716 hourly samples

Typical Wind

Variable, 20.8mph
Mean: 20.9 mph
P10–P90: 6.9 — 35.8 mph
Recorded extremes

1.1 — 50.8 mph

Circular concentration: 20%

Compared With Previous Decembers

Historical baseline from 5,900 observations across 8 years.

Wave Height
11.4ft
1.6ft below mean
Historical mean 13ft
Wave Period
7.5s
0.1s below mean
Historical mean 7.6s
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 Dec 2021Last observation shown
Metric
Mean wave height (ft)91281013202019211811141813111188994451296121071010
Mean observed period(s)7Reported8Reported7Reported7Reported7Reported8Reported9Reported9Reported8Reported8Reported8Reported9Reported9Reported7Reported7Reported8Reported7Reported7Reported8Reported9Reported6Reported6Reported5Reported8Reported8Reported7Reported7Reported7Reported5Reported7Reported8Reported
Mean wave power(kW/m)-------------------------------
Mean wind directionNconcentration 97%NNWconcentration 93%Sconcentration 58%NNEconcentration 37%SSEconcentration 88%SSEconcentration 92%SSEconcentration 98%ESEconcentration 98%SEconcentration 99%SEconcentration 100%SEconcentration 94%SSWconcentration 90%SSWconcentration 85%SWconcentration 95%WSWconcentration 96%WSWconcentration 88%WSWconcentration 98%Wconcentration 100%Nconcentration 100%NWconcentration 80%Wconcentration 83%Nconcentration 81%NNEconcentration 94%NNEconcentration 95%NNWconcentration 81%Sconcentration 93%SSEconcentration 98%Sconcentration 95%Sconcentration 81%Variableconcentration 29%NWconcentration 39%
Mean wind speed (mph)21231316233723294033201734302821212010610719217102919231117
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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