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K4 wave buoy daily means for Nov 2015

Daily means from the K4 wave buoy for Nov 2015, 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

678 wave-buoy observations covered all 30 days. Typical wave height was 14.8 ft (10th–90th percentile 9.2–21.7 ft), while mean reported wave period; measurement type unavailable was 7.9 seconds (10th–90th percentile 7–9 seconds). Typical wind was 25.3 mph (10th–90th percentile 12.8–33.3 mph) and mean water temperature was 12.4°C (10th–90th percentile 11.9–12.9°C). 79 of 3,389 checked values (2.3%) were excluded by quality control. Across 5 comparable years, mean wave height was above the same-month mean of 13.5 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

14.8ft
Mean: 15.1 ft
P10–P90: 9.2 — 21.7 ft
Recorded extremes

0 — 31.8 ft

Available for 661 of 678 hourly samples

Mean Wave Period

7.9secs
P10–P90: 7 — 9secs
Recorded extremes

5 — 11secs

Available for 662 of 678 hourly samples

Mean Water Temperature

12.4°C
P10–P90: 11.9 — 12.9°C
Recorded extremes

11.4 — 13.6°C

Available for 677 of 678 hourly samples

Typical Wind

WSW, 25.3mph
Mean: 24.1 mph
P10–P90: 12.8 — 33.3 mph
Recorded extremes

0 — 48.3 mph

Circular concentration: 52%

Available for 632 of 678 hourly samples

Compared With Previous Novembers

Historical baseline from 3,515 observations across 5 years.

Wave Height
15.1ft
1.6ft above mean
Historical mean 13.5ft
Wave Period
7.9s
0.1s above mean
Historical mean 7.8s
Water Temperature
12.4°C
0.6°C above mean
Historical mean 11.8°C

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 2015Last observation shown
Metric
Mean wave height (ft)1311117713111419171620201416191217151514131021161218242318
Mean observed period(s)7Reported7Reported9Reported7Reported6Reported7Reported7Reported7Reported9Reported9Reported8Reported9Reported9Reported8Reported8Reported9Reported8Reported8Reported8Reported7Reported7Reported8Reported6Reported9Reported8Reported7Reported8Reported9Reported9Reported10Reported
Mean wave power(kW/m)------------------------------
Mean wind directionSSWconcentration 98%Sconcentration 99%Sconcentration 52%SEconcentration 97%Sconcentration 97%SSWconcentration 84%SWconcentration 93%SSWconcentration 75%SWconcentration 81%WSWconcentration 82%SWconcentration 82%SWconcentration 58%Wconcentration 90%WSWconcentration 37%WSWconcentration 69%Wconcentration 95%Variableconcentration 23%WSWconcentration 77%WNWconcentration 92%NNWconcentration 85%NWconcentration 90%NWconcentration 73%Wconcentration 77%WNWconcentration 86%WNWconcentration 97%Wconcentration 67%WNWconcentration 80%WNWconcentration 81%WNWconcentration 90%Variableconcentration 22%
Mean wind speed (mph)282111141928172525232430301925321431253028172432272730343212
Mean water temperature(°C)12.712.812.912.913.012.812.812.912.712.712.712.512.512.512.512.612.412.312.212.011.912.012.312.112.212.112.111.911.711.5

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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