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Ch. Lightship wave buoy daily means for Jan 2011

Daily means from the Ch. Lightship wave buoy for Jan 2011, 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

738 wave-buoy observations covered all 31 days. Typical wave height was 3.6 ft (10th–90th percentile 2–9.2 ft), while mean reported wave period; measurement type unavailable was 7.7 seconds (10th–90th percentile 5–10 seconds). Typical wind was 22 mph (10th–90th percentile 11.4–33.4 mph) and mean water temperature was 9.4°C (10th–90th percentile 8–10°C). 17 of 3,671 checked values (0.5%) were excluded by quality control.

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

Typical Wave Height

3.6ft
Mean: 4.8 ft
P10–P90: 2 — 9.2 ft
Recorded extremes

1 — 15.4 ft

Available for 729 of 738 hourly samples

Mean Wave Period

7.7secs
P10–P90: 5 — 10secs
Recorded extremes

4 — 14secs

Available for 732 of 738 hourly samples

Mean Water Temperature

9.4°C
P10–P90: 8 — 10°C
Recorded extremes

8 — 10°C

Available for 731 of 738 hourly samples

Typical Wind

Variable, 22mph
Mean: 22.5 mph
P10–P90: 11.4 — 33.4 mph
Recorded extremes

1.1 — 46.1 mph

Circular concentration: 10%

Available for 728 of 738 hourly samples

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 Jan 2011Last observation shown
Metric
Mean wave height (ft)3432424105676899108532334323QC rejected7432
Mean observed period(s)12Reported11Reported8Reported7Reported6Reported6Reported8Reported9Reported9Reported7Reported8Reported8Reported8Reported9Reported9Reported10Reported11Reported9Reported9Reported8Reported8Reported6Reported6Reported5Reported5Reported5Reported7Reported7Reported6Reported6Reported8Reported
Mean wave power(kW/m)-------------------------------
Mean wind directionNNEconcentration 92%Econcentration 82%Sconcentration 58%WSWconcentration 48%SSWconcentration 78%ENEconcentration 60%Sconcentration 91%WSWconcentration 83%Wconcentration 88%Sconcentration 98%WNWconcentration 81%SWconcentration 94%SWconcentration 99%SWconcentration 97%SSWconcentration 99%Sconcentration 94%SSWconcentration 65%Nconcentration 89%NEconcentration 96%NEconcentration 93%NNEconcentration 95%NNEconcentration 94%NNEconcentration 98%Nconcentration 95%WNWconcentration 90%NNEconcentration 72%ENEconcentration 95%ENEconcentration 97%ENEconcentration 94%NEconcentration 98%Nconcentration 57%
Mean wind speed (mph)1318201724172527163126303128272415181217162426232026373425208
Mean water temperature(°C)10.09.99.49.510.010.010.010.010.010.010.010.010.010.010.010.09.69.09.09.09.09.09.09.09.09.09.08.38.08.28.1

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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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