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Brittany wave buoy daily means for Feb 2021

Daily means from the Brittany wave buoy for Feb 2021, 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 13.8 ft (10th–90th percentile 8.9–20 ft), while mean reported wave period; measurement type unavailable was 8.4 seconds (10th–90th percentile 7–10 seconds). Typical wind was 20.8 mph (10th–90th percentile 9.2–32.2 mph). 6 of 2,668 checked values (0.2%) were excluded by quality control. Across 9 comparable years, mean wave height was above the same-month mean of 13.4 ft and mean wave period was above the same-month mean of 8.1 seconds.

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

Typical Wave Height

13.8ft
Mean: 14.2 ft
P10–P90: 8.9 — 20 ft
Recorded extremes

4.3 — 35.8 ft

Available for 661 of 667 hourly samples

Mean Wave Period

8.4secs
P10–P90: 7 — 10secs
Recorded extremes

4 — 13secs

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 667 hourly samples

Typical Wind

SSW, 20.8mph
Mean: 20.6 mph
P10–P90: 9.2 — 32.2 mph
Recorded extremes

3.4 — 38 mph

Circular concentration: 37%

Compared With Previous Februarys

Historical baseline from 6,012 observations across 9 years.

Wave Height
14.2ft
0.8ft above mean
Historical mean 13.4ft
Wave Period
8.4s
0.3s above mean
Historical mean 8.1s
Water Temperature
–
Not enough comparable data
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 2021Last observation shown
Metric
Mean wave height (ft)251815111097111315131415QC rejected14151614182015121820138119
Mean observed period(s)11Reported9Reported10Reported8Reported8Reported7Reported6Reported6Reported7Reported8Reported8Reported10Reported9Reported9Reported8Reported8Reported8Reported8Reported8Reported9Reported10Reported9Reported8Reported10Reported10Reported8Reported9Reported7Reported
Mean wave power(kW/m)----------------------------
Mean wind directionWSWconcentration 95%SWconcentration 96%WSWconcentration 68%Wconcentration 63%NWconcentration 84%NNWconcentration 94%SSEconcentration 44%Econcentration 98%Variableconcentration 8%ENEconcentration 87%Sconcentration 81%SSWconcentration 86%SSWconcentration 96%SSWconcentration 95%SSWconcentration 98%SWconcentration 99%SSWconcentration 97%WSWconcentration 81%SSWconcentration 98%SSWconcentration 88%WSWconcentration 89%SSWconcentration 83%Sconcentration 100%SWconcentration 69%Nconcentration 95%ESEconcentration 96%Econcentration 98%Econcentration 99%
Mean wind speed (mph)27241411161820262522171119252324312332261019342311101620
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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