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Brittany wave buoy daily means for Nov 2019

Daily means from the Brittany wave buoy for Nov 2019, 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

688 wave-buoy observations covered all 30 days. Typical wave height was 13.8 ft (10th–90th percentile 7.2–21.3 ft), while mean reported wave period; measurement type unavailable was 7.9 seconds (10th–90th percentile 6–10 seconds). Typical wind was 23 mph (10th–90th percentile 12.8–33.3 mph). 6 of 2,752 checked values (0.2%) were excluded by quality control. Across 9 comparable years, mean wave height was above the same-month mean of 11.8 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: 14 ft
P10–P90: 7.2 — 21.3 ft
Recorded extremes

4.6 — 28.5 ft

Available for 683 of 688 hourly samples

Mean Wave Period

7.9secs
P10–P90: 6 — 10secs
Recorded extremes

5 — 13secs

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 688 hourly samples

Typical Wind

WNW, 23mph
Mean: 22.7 mph
P10–P90: 12.8 — 33.3 mph
Recorded extremes

2.2 — 41.4 mph

Circular concentration: 53%

Available for 687 of 688 hourly samples

Compared With Previous Novembers

Historical baseline from 6,386 observations across 9 years.

Wave Height
14ft
2.2ft above mean
Historical mean 11.8ft
Wave Period
7.9s
0.1s above mean
Historical mean 7.8s
Water Temperature
–
Not enough comparable data
Historical mean 14.8°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 Nov 2019Last observation shown
Metric
Mean wave height (ft)9221920171119161217151917251999810171391291217151169
Mean observed period(s)6Reported9Reported9Reported9Reported9Reported7Reported8Reported8Reported7Reported10Reported8Reported11Reported9Reported10Reported9Reported7Reported7Reported7Reported8Reported10Reported8Reported6Reported6Reported6Reported7Reported8Reported8Reported7Reported6Reported6Reported
Mean wave power(kW/m)------------------------------
Mean wind directionWSWconcentration 94%Wconcentration 95%WNWconcentration 91%WNWconcentration 94%NNWconcentration 96%WNWconcentration 81%NWconcentration 93%NWconcentration 87%WNWconcentration 64%NWconcentration 61%NWconcentration 94%NNWconcentration 85%WNWconcentration 88%NNWconcentration 81%Nconcentration 100%NWconcentration 84%NEconcentration 67%ENEconcentration 33%SWconcentration 53%SSWconcentration 94%WSWconcentration 95%ENEconcentration 34%NWconcentration 98%SWconcentration 83%WSWconcentration 80%WSWconcentration 94%Wconcentration 100%Wconcentration 99%SWconcentration 63%SSWconcentration 55%
Mean wind speed (mph)263129312621322326202515263231151614141719212619202827201514
Mean water temperature(°C)------------------------------

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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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