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Brittany wave buoy daily means for Nov 2010

Daily means from the Brittany 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

710 wave-buoy observations covered all 30 days. Typical wave height was 16.7 ft (10th–90th percentile 8.9–25.3 ft), while mean reported wave period; measurement type unavailable was 9.2 seconds (10th–90th percentile 7–12 seconds). Typical wind was 18.4 mph (10th–90th percentile 10.3–31.1 mph) and mean water temperature was 14.4°C (10th–90th percentile 14–16°C). 49 of 3,550 checked values (1.4%) were excluded by quality control.

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

Typical Wave Height

16.7ft
Mean: 17.1 ft
P10–P90: 8.9 — 25.3 ft
Recorded extremes

3 — 39.7 ft

Available for 667 of 710 hourly samples

Mean Wave Period

9.2secs
P10–P90: 7 — 12secs
Recorded extremes

5 — 18secs

Available for 704 of 710 hourly samples

Mean Water Temperature

14.4°C
P10–P90: 14 — 16°C
Recorded extremes

13 — 16°C

Typical Wind

WNW, 18.4mph
Mean: 19.8 mph
P10–P90: 10.3 — 31.1 mph
Recorded extremes

2.2 — 41.4 mph

Circular concentration: 42%

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 Nov 2010Last observation shown
Metric
Mean wave height (ft)18182016171318QC rejected2816162216141313222416121611661716171716QC rejected
Mean observed period(s)10Reported10Reported11Reported10Reported10Reported9Reported9Reported11Reported11Reported9Reported8Reported10Reported9Reported8Reported9Reported8Reported10Reported12Reported10Reported8Reported9Reported8Reported7Reported7Reported9Reported9Reported9Reported10Reported9Reported10Reported
Mean wave power(kW/m)------------------------------
Mean wind directionWconcentration 72%WSWconcentration 96%WSWconcentration 98%SWconcentration 99%SWconcentration 98%NWconcentration 74%NWconcentration 78%WNWconcentration 98%NNWconcentration 94%WNWconcentration 72%WSWconcentration 97%WSWconcentration 97%WNWconcentration 67%WSWconcentration 69%NWconcentration 87%SSWconcentration 82%Wconcentration 98%Wconcentration 95%Sconcentration 89%NNEconcentration 82%NEconcentration 98%Nconcentration 98%NNEconcentration 92%NWconcentration 86%Nconcentration 98%NNWconcentration 94%Nconcentration 94%NNEconcentration 41%Econcentration 97%ENEconcentration 95%
Mean wind speed (mph)181719181617233732172828111717222319131615131013242120112831
Mean water temperature(°C)15.915.816.015.915.816.016.015.214.014.014.014.014.014.014.014.014.014.214.314.814.014.014.014.014.014.014.013.813.113.0

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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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