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Brittany wave buoy daily means for Feb 2017

Daily means from the Brittany wave buoy for Feb 2017, 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

667 wave-buoy observations covered all 28 days. Typical wave height was 11.8 ft (10th–90th percentile 6.2–20.7 ft), while mean reported wave period; measurement type unavailable was 7.8 seconds (10th–90th percentile 6–10 seconds). Typical wind was 20.8 mph (10th–90th percentile 9.2–32.2 mph) and mean water temperature was 12°C (10th–90th percentile 11.9–12.1°C). 3 of 3,335 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 13.3 ft and mean wave period was below the same-month mean of 8.1 seconds.

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

Typical Wave Height

11.8ft
Mean: 12.6 ft
P10–P90: 6.2 — 20.7 ft
Recorded extremes

3 — 37.7 ft

Available for 664 of 667 hourly samples

Mean Wave Period

7.8secs
P10–P90: 6 — 10secs
Recorded extremes

5 — 12secs

Mean Water Temperature

12°C
P10–P90: 11.9 — 12.1°C
Recorded extremes

11.8 — 12.2°C

Typical Wind

WSW, 20.8mph
Mean: 20.5 mph
P10–P90: 9.2 — 32.2 mph
Recorded extremes

3.4 — 45 mph

Circular concentration: 35%

Compared With Previous Februarys

Historical baseline from 3,353 observations across 5 years.

Wave Height
12.6ft
0.7ft below mean
Historical mean 13.3ft
Wave Period
7.8s
0.3s below mean
Historical mean 8.1s
Water Temperature
12°C
0.1°C above mean
Historical mean 11.9°C

Chart showing grouped wave observations for Brittany. 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 Brittany wave buoy

Brittany buoy (WMO 62163) is maintained jointly by the UK Met Office and Météo-France in the Bay of Biscay. Its exposed position west of Brittany monitors Atlantic conditions approaching western France and the western entrance to the English Channel. The international feed can include wind, pressure, temperature and wave observations when available.

Metrics are rows; days run left to right.
Brittany wave buoy daily means Feb 2017Last observation shown
Metric
Mean wave height (ft)14272214161319181416101213765488778111191323QC rejected
Mean observed period(s)8Reported10Reported10Reported9Reported8Reported8Reported10Reported11Reported8Reported8Reported7Reported7Reported7Reported6Reported7Reported7Reported5Reported9Reported9Reported7Reported7Reported7Reported7Reported8Reported6Reported7Reported9Reported10Reported
Mean wave power(kW/m)----------------------------
Mean wind directionSSWconcentration 96%SWconcentration 88%WSWconcentration 42%WSWconcentration 70%WNWconcentration 83%SWconcentration 87%WNWconcentration 88%SWconcentration 49%SEconcentration 93%Econcentration 98%NEconcentration 96%Econcentration 98%SEconcentration 72%Sconcentration 89%SSWconcentration 85%Sconcentration 96%Sconcentration 99%Econcentration 50%WNWconcentration 89%NWconcentration 96%WNWconcentration 98%Wconcentration 99%NWconcentration 82%WNWconcentration 56%SWconcentration 95%WSWconcentration 94%Wconcentration 98%WNWconcentration 95%
Mean wind speed (mph)263423192724251428262230221710917911131317221122243230
Mean water temperature(°C)12.212.212.112.112.112.112.112.012.012.012.011.911.911.911.911.911.912.012.012.012.012.012.012.011.911.911.911.8

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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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