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Cormorant AWS wave buoy daily means for Apr 2018

Daily means from the Cormorant 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 5.9 ft (10th–90th percentile 3.3–8.9 ft), while mean reported wave period; measurement type unavailable was 6.4 seconds (10th–90th percentile 5–8 seconds). Typical wind was 12.8 mph (10th–90th percentile 4.7–24.2 mph). 20 of 2,788 checked values (0.7%) were excluded by quality control. Across 4 comparable years, mean wave height was below the same-month mean of 8.1 ft and mean wave period was below the same-month mean of 6.6 seconds.

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

Typical Wave Height

5.9ft
Mean: 6 ft
P10–P90: 3.3 — 8.9 ft
Recorded extremes

2 — 13.1 ft

Available for 687 of 697 hourly samples

Mean Wave Period

6.4secs
P10–P90: 5 — 8secs
Recorded extremes

4 — 11secs

Available for 687 of 697 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 697 hourly samples

Typical Wind

Variable, 12.8mph
Mean: 13.4 mph
P10–P90: 4.7 — 24.2 mph
Recorded extremes

0 — 32.2 mph

Circular concentration: 10%

Compared With Previous Aprils

Historical baseline from 2,822 observations across 4 years.

Wave Height
6ft
2.1ft below mean
Historical mean 8.1ft
Wave Period
6.4s
0.2s below mean
Historical mean 6.6s
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 Apr 2018Last observation shown
Metric
Mean wave height (ft)47686610711554643379755987666544
Mean observed period(s)6Reported7Reported6Reported7Reported7Reported7Reported7Reported6Reported7Reported7Reported8Reported8Reported9Reported6Reported6Reported5Reported6Reported8Reported6Reported5Reported6Reported6Reported6Reported6Reported6Reported7Reported7Reported7Reported6Reported5Reported
Mean wave power(kW/m)------------------------------
Mean wind directionNNWconcentration 75%NNEconcentration 83%ENEconcentration 96%NNWconcentration 62%Nconcentration 68%SSWconcentration 65%Sconcentration 69%ENEconcentration 93%NEconcentration 100%SSEconcentration 69%Econcentration 99%SEconcentration 63%Econcentration 97%SSEconcentration 96%SEconcentration 80%SSEconcentration 95%SSEconcentration 96%SSWconcentration 94%SSWconcentration 89%WSWconcentration 98%WSWconcentration 81%SSEconcentration 98%SWconcentration 90%Wconcentration 94%SWconcentration 81%SWconcentration 94%NNWconcentration 87%NNWconcentration 89%NNEconcentration 98%NNEconcentration 98%
Mean wind speed (mph)111015119101612286881414615251620191426191889991010
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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