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K4 wave buoy daily means for Nov 2010

Daily means from the K4 wave buoy for Nov 2010, 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

713 wave-buoy observations covered all 30 days. Typical wave height was 10.8 ft (10th–90th percentile 4.6–22.3 ft), while mean reported wave period; measurement type unavailable was 7.5 seconds (10th–90th percentile 6–9 seconds). Typical wind was 18.4 mph (10th–90th percentile 6.9–32.3 mph) and mean water temperature was 11.7°C (10th–90th percentile 11–13°C). 3 of 3,555 checked values (0.1%) were excluded by quality control.

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

Typical Wave Height

10.8ft
Mean: 12.5 ft
P10–P90: 4.6 — 22.3 ft
Recorded extremes

3.6 — 39.4 ft

Mean Wave Period

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

5 — 14secs

Mean Water Temperature

11.7°C
P10–P90: 11 — 13°C
Recorded extremes

11 — 13°C

Available for 708 of 713 hourly samples

Typical Wind

Variable, 18.4mph
Mean: 19.5 mph
P10–P90: 6.9 — 32.3 mph
Recorded extremes

0 — 48.4 mph

Circular concentration: 21%

Available for 710 of 713 hourly samples

Chart showing grouped wave observations for K4. 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 K4 wave buoy

K4 (WMO 62105) is a UK Met Office buoy in the North Atlantic northwest of Ireland. Its remote position samples weather and sea conditions moving towards northern UK and Irish waters. The international station feed can include wind, pressure, temperature and wave observations, although the reported parameters vary with sensor availability.

Metrics are rows; days run left to right.
K4 wave buoy daily means Nov 2010Last observation shown
Metric
Mean wave height (ft)12QC rejectedQC rejected11119112816828171210813231585444710131812128
Mean observed period(s)7Reported10Reported9Reported7Reported8Reported7Reported7Reported12Reported9Reported7Reported10Reported9Reported7Reported7Reported7Reported7Reported9Reported8Reported7Reported7Reported6Reported5Reported6Reported6Reported7Reported7Reported8Reported7Reported7Reported6Reported
Mean wave power(kW/m)------------------------------
Mean wind directionSWconcentration 88%WSWconcentration 98%WSWconcentration 87%WSWconcentration 81%NNWconcentration 71%NWconcentration 86%WSWconcentration 66%NNWconcentration 68%NNEconcentration 98%SWconcentration 66%Wconcentration 96%Wconcentration 98%Wconcentration 95%NEconcentration 60%Wconcentration 61%SSEconcentration 91%ESEconcentration 91%NWconcentration 55%SSWconcentration 86%Econcentration 74%ENEconcentration 84%NEconcentration 84%Nconcentration 63%NNEconcentration 94%Nconcentration 94%Nconcentration 98%NNEconcentration 94%NEconcentration 93%Econcentration 98%ENEconcentration 90%
Mean wind speed (mph)24301622161822231615QC rejected25181516303221137811615212628211915
Mean water temperature(°C)13.013.013.012.312.012.012.012.012.012.011.912.012.012.011.411.011.011.311.811.312.011.711.411.011.011.011.011.011.011.0

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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