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Ch. Lightship wave buoy daily means for Feb 2012

Daily means from the Ch. Lightship wave buoy for Feb 2012, 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

676 wave-buoy observations covered all 29 days. Typical wave height was 3.3 ft (10th–90th percentile 2–6.6 ft), while mean reported wave period; measurement type unavailable was 7.9 seconds (10th–90th percentile 6–11 seconds). Typical wind was 18.4 mph (10th–90th percentile 8.1–29.9 mph) and mean water temperature was 9.5°C (10th–90th percentile 9.3–9.8°C). 5 of 3,371 checked values (0.1%) were excluded by quality control. Across 1 comparable year, mean wave height was below the same-month mean of 7.3 ft and mean wave period was below the same-month mean of 9.9 seconds.

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

Typical Wave Height

3.3ft
Mean: 3.8 ft
P10–P90: 2 — 6.6 ft
Recorded extremes

1 — 9.5 ft

Available for 669 of 676 hourly samples

Mean Wave Period

7.9secs
P10–P90: 6 — 11secs
Recorded extremes

3 — 14secs

Available for 675 of 676 hourly samples

Mean Water Temperature

9.5°C
P10–P90: 9.3 — 9.8°C
Recorded extremes

9 — 10.1°C

Available for 673 of 676 hourly samples

Typical Wind

NNW, 18.4mph
Mean: 18.4 mph
P10–P90: 8.1 — 29.9 mph
Recorded extremes

2.2 — 42.6 mph

Circular concentration: 31%

Available for 673 of 676 hourly samples

Compared With Previous Februarys

Historical baseline from 672 observations across 1 year.

Wave Height
3.8ft
3.5ft below mean
Historical mean 7.3ft
Wave Period
7.9s
2s below mean
Historical mean 9.9s
Water Temperature
9.5°C
0.3°C above mean
Historical mean 9.2°C

Chart showing grouped wave observations for Ch. Lightship. 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 Ch. Lightship wave buoy

Channel Lightship (WMO 62103) is a UK Met Office station in the central English Channel. Its offshore position provides marine observations away from the immediate influence of the coast and is useful for tracking conditions along this major shipping route. The feed can include wind, pressure, air and sea temperature, visibility and wave observations when available.

Metrics are rows; days run left to right.
Ch. Lightship wave buoy daily means Feb 2012Last observation shown
Metric
Mean wave height (ft)67336346433223322542355664233
Mean observed period(s)7Reported7Reported7Reported10Reported7Reported9Reported10Reported8Reported9Reported9Reported8Reported8Reported6Reported5Reported5Reported6Reported6Reported7Reported6Reported8Reported6Reported7Reported7Reported11Reported11Reported9Reported9Reported11Reported10Reported
Mean wave power(kW/m)-----------------------------
Mean wind directionNEconcentration 99%NEconcentration 94%NEconcentration 84%Variableconcentration 21%Nconcentration 47%NNEconcentration 72%ENEconcentration 96%NEconcentration 96%NNEconcentration 81%SEconcentration 91%Econcentration 86%Nconcentration 94%Nconcentration 92%Nconcentration 93%NNWconcentration 95%NWconcentration 92%WNWconcentration 97%Wconcentration 83%NNWconcentration 95%Wconcentration 69%WSWconcentration 97%SWconcentration 93%Wconcentration 98%Wconcentration 98%WNWconcentration 89%NNWconcentration 56%WSWconcentration 94%WSWconcentration 87%SSEconcentration 87%
Mean wind speed (mph)3228141522112022101614162127231918282212212822171010141210
Mean water temperature(°C)10.09.69.59.59.99.89.79.39.49.49.29.39.59.59.49.49.49.49.29.29.49.49.59.59.59.69.69.69.7

Swipe sideways to see more days.

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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