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K2 wave buoy daily means for Nov 2012

Daily means from the K2 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 7.9–19.7 ft), while mean reported wave period; measurement type unavailable was 8.1 seconds (10th–90th percentile 7–10 seconds). Typical wind was 20.7 mph (10th–90th percentile 10.3–28.9 mph) and mean water temperature was 12.7°C (10th–90th percentile 12.4–13°C). 330 of 2,299 checked values (14.4%) were excluded by quality control. Across 2 comparable years, mean wave height was below the same-month mean of 14.1 ft and mean wave period was above the same-month mean of 7.8 seconds.

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

Typical Wave Height

13.8ft
Mean: 13.6 ft
P10–P90: 7.9 — 19.7 ft
Recorded extremes

6.2 — 26.6 ft

Available for 392 of 720 hourly samples

Mean Wave Period

8.1secs
P10–P90: 7 — 10secs
Recorded extremes

6 — 12secs

Available for 395 of 720 hourly samples

Mean Water Temperature

12.7°C
P10–P90: 12.4 — 13°C
Recorded extremes

12.1 — 13.1°C

Available for 395 of 720 hourly samples

Typical Wind

WNW, 20.7mph
Mean: 19.9 mph
P10–P90: 10.3 — 28.9 mph
Recorded extremes

3.4 — 35.8 mph

Circular concentration: 67%

Available for 393 of 720 hourly samples

Compared With Previous Novembers

Historical baseline from 1,435 observations across 2 years.

Wave Height
13.6ft
0.5ft below mean
Historical mean 14.1ft
Wave Period
8.1s
0.3s above mean
Historical mean 7.8s
Water Temperature
12.7°C
0.2°C below mean
Historical mean 12.9°C

Chart showing grouped wave observations for K2. 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 K2 wave buoy

K2 (WMO 62081) is a UK Met Office buoy in the North Atlantic west of Ireland. It provides an upstream view of ocean weather and sea conditions before systems reach Ireland and the UK. The international station 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.
K2 wave buoy daily means Nov 2012Last observation shown
Metric
Mean wave height (ft)15161619148991422161116149915-------------
Mean observed period(s)8Reported9Reported8Reported9Reported8Reported6Reported7Reported7Reported8Reported10Reported9Reported7Reported9Reported9Reported9Reported8Reported9Reported-------------
Mean wave power(kW/m)------------------------------
Mean wind directionWNWconcentration 97%WNWconcentration 96%Wconcentration 97%NWconcentration 96%Nconcentration 98%WNWconcentration 92%Wconcentration 89%WSWconcentration 87%Wconcentration 94%NWconcentration 94%Wconcentration 72%SWconcentration 93%SSWconcentration 88%NNEconcentration 68%NNWconcentration 69%Wconcentration 77%WNWconcentration 97%-------------
Mean wind speed (mph)272225272116181621292123161691218-------------
Mean water temperature(°C)12.912.712.812.913.012.912.912.912.412.512.712.712.712.612.512.512.5-------------

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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.

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

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