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K7 wave buoy daily means for Dec 2022

Daily means from the K7 wave buoy for Dec 2022, 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

743 wave-buoy observations covered all 31 days. Typical wave height was 0 ft; wave-period data were unavailable. Typical wind was 25.3 mph (10th–90th percentile 13.9–34.4 mph) and mean water temperature was 9.5°C (10th–90th percentile 8.4–10.3°C). 1,251 of 3,715 checked values (33.7%) were excluded by quality control. Across 10 comparable years, mean wave height was below the same-month mean of 13.3 ft.

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

Typical Wave Height

0ft
Mean: 0 ft
P10–P90: 0 — 0 ft
Recorded extremes

0 — 0 ft

Available for 493 of 743 hourly samples

Mean Wave Period

-secs
P10–P90: - — -secs

Available for 0 of 743 hourly samples

Mean Water Temperature

9.5°C
P10–P90: 8.4 — 10.3°C
Recorded extremes

8.1 — 10.7°C

Available for 493 of 743 hourly samples

Typical Wind

Variable, 25.3mph
Mean: 25 mph
P10–P90: 13.9 — 34.4 mph
Recorded extremes

0 — 50.8 mph

Circular concentration: 22%

Available for 735 of 743 hourly samples

Compared With Previous Decembers

Historical baseline from 7,368 observations across 10 years.

Wave Height
0ft
13.3ft below mean
Historical mean 13.3ft
Wave Period
–
Not enough comparable data
Historical mean 8.5s
Water Temperature
9.5°C
0.1°C below mean
Historical mean 9.6°C

Chart showing grouped wave observations for K7. 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 K7 wave buoy

K7 (WMO 64046) is a UK Met Office buoy west of Shetland in the North Atlantic. Its position monitors ocean weather and sea conditions approaching the Northern Isles. The international feed can include wind, pressure, air and sea temperature, and wave observations when the relevant sensors are reporting.

Metrics are rows; days run left to right.
K7 wave buoy daily means Dec 2022Last observation shown
Metric
Mean wave height (ft)000000000000000000-000000000000
Mean observed period(s)-------------------------------
Mean wave power(kW/m)-------------------------------
Mean wind directionSconcentration 98%Sconcentration 99%Sconcentration 100%SSWconcentration 83%Nconcentration 94%Nconcentration 99%Nconcentration 98%Nconcentration 98%NNEconcentration 96%NEconcentration 97%NNEconcentration 84%NEconcentration 97%NNEconcentration 96%NNWconcentration 98%Nconcentration 97%ESEconcentration 44%WNWconcentration 41%Econcentration 78%SSEconcentration 90%SSWconcentration 96%SEconcentration 45%NNEconcentration 99%NEconcentration 96%ESEconcentration 66%SWconcentration 84%Wconcentration 91%Variableconcentration 7%NEconcentration 62%WNWconcentration 75%NNEconcentration 76%NWconcentration 84%
Mean wind speed (mph)24162012202730333028193330342317212324271928213132412216272819
Mean water temperature(°C)10.310.210.29.99.89.69.59.910.610.410.210.19.79.68.99.19.29.1-8.98.78.68.49.39.18.38.49.29.49.79.8

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.

The observation data displayed on this page is from the UK Met Office.

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