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Les Pierres Noires wave buoy daily means for Feb 2014

Daily means from the Les Pierres Noires wave buoy for Feb 2014, 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

1,304 wave-buoy observations covered all 28 days. Typical wave height was 15 ft (10th–90th percentile 11.2–24 ft), while mean average of more than one wave period type was 12.7 seconds (10th–90th percentile 10.3–15.2 seconds). Typical calculated wave power was approximately 112.1 kW/m (10th–90th percentile 56.6–323.6 kW/m), derived from significant wave height and energy period. 5 of 3,901 checked values (0.1%) were excluded by quality control. Across 4 comparable years, mean wave height was above the same-month mean of 8 ft and mean wave period was above the same-month mean of 12.2 seconds.

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

Typical Significant Wave Height

15ft
Mean: 16.4 ft
P10–P90: 11.2 — 24 ft
Recorded extremes

6.4 — 43.3 ft

Mean Observed Wave Period

12.7secs
P10–P90: 10.3 — 15.2secs
Recorded extremes

6.4 — 18.6secs

Typical Wave Power

Approximately 112.09kW/m
Mean: 161.9kW/m
P10–P90: 56.58 — 323.61kW/m
Recorded extremes

17.03 — 1270.9kW/m

Calculated from significant wave height and energy period.

Available for 651 of 654 hourly samples with wave power

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Available for 0 of 654 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 654 hourly samples

Compared With Previous Februarys

Historical baseline from 5,395 observations across 4 years.

Wave Height
16.4ft
8.4ft above mean
Historical mean 7.972ft
Wave Period
12.7s
0.5s above mean
Historical mean 12.2s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Les Pierres Noires. 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 Les Pierres Noires wave buoy

Les Pierres Noires is a CANDHIS directional buoy west of Brittany, maintained through the French national sea-state observatory and its scientific and maritime partners. Its position near the offshore reef and lighthouse represents fully exposed Atlantic conditions approaching the Iroise Sea and western Brittany.

Its current data source reports wave height, wave period, wave direction, directional spread and sea temperature.

Metrics are rows; days run left to right.
Les Pierres Noires wave buoy daily means Feb 2014Last observation shown
Metric
Mean significant wave height (ft)20171416QC rejected1516QC rejectedQC rejected1615201622181313129111514161417151319
Mean maximum wave height (ft)30262123462325413524243025332920211813172321242127232129
Mean peak period (s)1415121215121214151311131312151410141291214121313141113
Mean average period (s)121310101311101313121011111113111012109111210111212911
Mean period Tm02 (s)99781088101098989109797789889979
Mean peak wave directionWconcentration 99%WNWconcentration 100%WSWconcentration 97%WSWconcentration 96%Wconcentration 99%Wconcentration 98%WSWconcentration 99%Wconcentration 97%Wconcentration 100%WNWconcentration 100%Wconcentration 97%Wconcentration 97%Wconcentration 99%WSWconcentration 93%Wconcentration 100%Wconcentration 99%WSWconcentration 100%Wconcentration 100%Wconcentration 100%WSWconcentration 99%Wconcentration 100%WNWconcentration 100%Wconcentration 99%Wconcentration 100%Wconcentration 100%Wconcentration 100%Wconcentration 99%Wconcentration 100%
Mean directional spread (°)25.124.630.129.722.429.033.024.122.723.632.627.726.525.322.826.429.923.427.730.124.923.124.025.724.423.229.423.3
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.

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 Cerema CANDHIS coastal wave observatory.

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

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