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Cormorant AWS wave buoy daily means for Dec 2020

Daily means from the Cormorant AWS wave buoy for Dec 2020, 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

733 wave-buoy observations covered all 31 days. Typical wave height was 10.5 ft (10th–90th percentile 7.2–15.1 ft), while mean reported wave period; measurement type unavailable was 7.3 seconds (10th–90th percentile 6–9 seconds). Typical wind was 19.7 mph (10th–90th percentile 9.2–31.1 mph). 17 of 2,932 checked values (0.6%) were excluded by quality control. Across 7 comparable years, mean wave height was below the same-month mean of 13.3 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: 11.1 ft
P10–P90: 7.2 — 15.1 ft
Recorded extremes

0 — 21.7 ft

Available for 725 of 733 hourly samples

Mean Wave Period

7.3secs
P10–P90: 6 — 9secs
Recorded extremes

5 — 11secs

Available for 724 of 733 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 733 hourly samples

Typical Wind

SSE, 19.7mph
Mean: 20.1 mph
P10–P90: 9.2 — 31.1 mph
Recorded extremes

0 — 42.5 mph

Circular concentration: 36%

Compared With Previous Decembers

Historical baseline from 5,174 observations across 7 years.

Wave Height
11.1ft
2.2ft below mean
Historical mean 13.3ft
Wave Period
7.3s
0.3s 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 2020Last observation shown
Metric
Mean wave height (ft)QC rejected131313141081181117118189712913131199109QC rejected16121087
Mean observed period(s)7Reported8Reported9Reported9Reported9Reported7Reported6Reported7Reported6Reported6Reported8Reported8Reported7Reported8Reported7Reported6Reported7Reported6Reported7Reported7Reported7Reported7Reported7Reported7Reported6Reported8Reported10Reported9Reported9Reported8Reported6Reported
Mean wave power(kW/m)-------------------------------
Mean wind directionWSWconcentration 37%SWconcentration 93%Sconcentration 88%Econcentration 82%NEconcentration 97%ENEconcentration 88%ENEconcentration 90%SEconcentration 96%SSEconcentration 98%SSEconcentration 99%SEconcentration 98%SEconcentration 95%SEconcentration 98%SEconcentration 98%SSWconcentration 97%Sconcentration 96%SSWconcentration 93%Sconcentration 99%Sconcentration 99%SSWconcentration 97%SSWconcentration 93%WNWconcentration 65%NNWconcentration 95%Nconcentration 99%WSWconcentration 87%SWconcentration 95%SWconcentration 44%ESEconcentration 73%SSEconcentration 34%NNEconcentration 96%Nconcentration 98%
Mean wind speed (mph)1922111718182021232832141834151924242627232019232128111141221
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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