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Ch. Lightship wave buoy daily means for Mar 2015

Daily means from the Ch. Lightship wave buoy for Mar 2015, 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

385 wave-buoy observations covered 27 of 31 days (87%). Typical wave height was 3.9 ft (10th–90th percentile 2.3–9.8 ft), while mean reported wave period; measurement type unavailable was 8 seconds (10th–90th percentile 6–10 seconds). Typical wind was 23 mph (10th–90th percentile 10.7–36.9 mph) and mean water temperature was 9.5°C (10th–90th percentile 9.3–9.8°C). All 1,925 checked values passed quality control. Across 5 comparable years, mean wave height was above the same-month mean of 3.9 ft and mean wave period was the same as the same-month mean of 8 seconds.

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

Typical Wave Height

3.9ft
Mean: 5.6 ft
P10–P90: 2.3 — 9.8 ft
Recorded extremes

1.3 — 15.7 ft

Mean Wave Period

8secs
P10–P90: 6 — 10secs
Recorded extremes

5 — 13secs

Mean Water Temperature

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

9.1 — 9.9°C

Typical Wind

WNW, 23mph
Mean: 23.6 mph
P10–P90: 10.7 — 36.9 mph
Recorded extremes

2.2 — 51.9 mph

Circular concentration: 43%

Compared With Previous Marchs

Historical baseline from 3,497 observations across 5 years.

Wave Height
5.6ft
1.7ft above mean
Historical mean 3.9ft
Wave Period
8s
In line with the historical mean
Historical mean 8s
Water Temperature
9.5°C
0.1°C above mean
Historical mean 9.4°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 Mar 2015Last observation shown
Metric
Mean wave height (ft)8988465755337QC rejected----233333354611811
Mean observed period(s)8Reported8Reported8Reported7Reported9Reported11Reported9Reported9Reported9Reported10Reported8Reported9Reported8Reported8Reported----6Reported9Reported8Reported7Reported11Reported7Reported7Reported7Reported8Reported7Reported8Reported9Reported8Reported
Mean wave power(kW/m)-------------------------------
Mean wind directionWconcentration 96%Wconcentration 98%WSWconcentration 93%NWconcentration 100%NWconcentration 98%Sconcentration 100%SSWconcentration 100%WSWconcentration 100%Sconcentration 83%NNEconcentration 70%SEconcentration 85%ESEconcentration 92%NWconcentration 61%NNEconcentration 100%----NEconcentration 94%NEconcentration 93%NEconcentration 81%NEconcentration 94%WSWconcentration 54%NWconcentration 92%NWconcentration 55%Wconcentration 63%WSWconcentration 72%WSWconcentration 96%Wconcentration 98%Wconcentration 92%WNWconcentration 98%
Mean wind speed (mph)3134323111171310201518172924----19141918102117231728352640
Mean water temperature(°C)9.79.69.69.59.59.69.79.89.79.89.89.89.69.5----9.59.49.49.49.49.59.59.59.59.69.79.69.7

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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