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K5 wave buoy daily means for Nov 2012

Daily means from the K5 wave buoy for Nov 2012, 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

720 wave-buoy observations covered all 30 days. Typical wave height was 13.8 ft (10th–90th percentile 8.2–20.3 ft), while mean reported wave period; measurement type unavailable was 7.8 seconds (10th–90th percentile 6–9 seconds). Typical wind was 23 mph (10th–90th percentile 10.4–32.2 mph) and mean water temperature was 10°C (10th–90th percentile 9.8–10.2°C). 11 of 3,567 checked values (0.3%) were excluded by quality control. Across 2 comparable years, mean wave height was above the same-month mean of 13.7 ft and mean wave period was above the same-month mean of 7.5 seconds.

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

Typical Wave Height

13.8ft
Mean: 14.1 ft
P10–P90: 8.2 — 20.3 ft
Recorded extremes

6.2 — 26.2 ft

Available for 709 of 720 hourly samples

Mean Wave Period

7.8secs
P10–P90: 6 — 9secs
Recorded extremes

5 — 11secs

Available for 712 of 720 hourly samples

Mean Water Temperature

10°C
P10–P90: 9.8 — 10.2°C
Recorded extremes

9.7 — 10.4°C

Available for 712 of 720 hourly samples

Typical Wind

WSW, 23mph
Mean: 21.9 mph
P10–P90: 10.4 — 32.2 mph
Recorded extremes

2.2 — 43.8 mph

Circular concentration: 34%

Available for 712 of 720 hourly samples

Compared With Previous Novembers

Historical baseline from 1,435 observations across 2 years.

Wave Height
14.1ft
0.4ft above mean
Historical mean 13.7ft
Wave Period
7.8s
0.3s above mean
Historical mean 7.5s
Water Temperature
10°C
0.9°C below mean
Historical mean 10.9°C

Chart showing grouped wave observations for K5. 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 K5 wave buoy

K5 (WMO 64045) is a UK Met Office buoy in the far North Atlantic west of Scotland. It provides observations from a sparsely monitored ocean area upstream of the Hebrides and northern UK waters. The international feed includes marine weather and sea-temperature observations, with wave and wind parameters present only when the relevant sensors are reporting.

Metrics are rows; days run left to right.
K5 wave buoy daily means Nov 2012Last observation shown
Metric
Mean wave height (ft)232213129141817202013131615161917121313QC rejected1315149997811
Mean observed period(s)10Reported9Reported8Reported8Reported7Reported7Reported8Reported8Reported9Reported9Reported8Reported7Reported8Reported8Reported8Reported9Reported9Reported7Reported7Reported7Reported8Reported7Reported7Reported8Reported7Reported6Reported6Reported7Reported7Reported8Reported
Mean wave power(kW/m)------------------------------
Mean wind directionNconcentration 91%Wconcentration 66%ESEconcentration 56%NNEconcentration 97%WNWconcentration 84%Wconcentration 96%WSWconcentration 93%SWconcentration 70%SWconcentration 98%NWconcentration 87%NNWconcentration 39%Sconcentration 85%SSWconcentration 97%SWconcentration 96%SWconcentration 94%SWconcentration 96%WSWconcentration 88%WSWconcentration 72%NEconcentration 84%ESEconcentration 37%SSWconcentration 94%SSWconcentration 94%WSWconcentration 96%SWconcentration 95%NWconcentration 37%Nconcentration 96%NNEconcentration 98%Variableconcentration 22%SEconcentration 70%Nconcentration 81%
Mean wind speed (mph)30331817192629252726112423242825231731192821262114191971114
Mean water temperature(°C)10.310.210.110.010.010.110.210.210.210.210.110.110.010.010.110.19.99.99.910.09.99.99.89.89.99.99.89.89.99.8

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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