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Ch. Lightship wave buoy daily means for Jun 2021

Daily means from the Ch. Lightship wave buoy for Jun 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

716 wave-buoy observations covered all 30 days. Typical wave height was 2 ft (10th–90th percentile 1–3.6 ft), while mean reported wave period; measurement type unavailable was 7.6 seconds (10th–90th percentile 6–10 seconds). Typical wind was 11.4 mph (10th–90th percentile 5.8–21.9 mph) and mean water temperature was 13.5°C (10th–90th percentile 12.7–14.7°C). All 3,580 checked values passed quality control. Across 11 comparable years, mean wave height was below the same-month mean of 2.8 ft and mean wave period was above the same-month mean of 7.2 seconds.

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

Typical Wave Height

2ft
Mean: 2.1 ft
P10–P90: 1 — 3.6 ft
Recorded extremes

0.3 — 6.2 ft

Mean Wave Period

7.6secs
P10–P90: 6 — 10secs
Recorded extremes

5 — 17secs

Mean Water Temperature

13.5°C
P10–P90: 12.7 — 14.7°C
Recorded extremes

11.5 — 16.3°C

Typical Wind

Variable, 11.4mph
Mean: 13 mph
P10–P90: 5.8 — 21.9 mph
Recorded extremes

2.2 — 36.9 mph

Circular concentration: 23%

Compared With Previous Junes

Historical baseline from 7,819 observations across 11 years.

Wave Height
2.1ft
0.7ft below mean
Historical mean 2.8ft
Wave Period
7.6s
0.4s above mean
Historical mean 7.2s
Water Temperature
13.5°C
0.1°C above mean
Historical mean 13.4°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 Jun 2021Last observation shown
Metric
Mean wave height (ft)222222223223223343225QC rejected21112111
Mean observed period(s)8Reported8Reported8Reported7Reported7Reported8Reported8Reported9Reported8Reported7Reported7Reported8Reported9Reported10Reported9Reported11Reported10Reported7Reported8Reported8Reported7Reported7Reported7Reported7Reported6Reported6Reported6Reported6Reported7Reported7Reported
Mean wave power(kW/m)------------------------------
Mean wind directionENEconcentration 93%SEconcentration 57%WSWconcentration 89%WNWconcentration 87%SWconcentration 79%SWconcentration 93%WSWconcentration 79%WSWconcentration 50%SWconcentration 94%SWconcentration 90%WSWconcentration 90%Wconcentration 97%NEconcentration 77%NNWconcentration 49%NNEconcentration 85%Nconcentration 58%NWconcentration 93%Nconcentration 98%ENEconcentration 69%ESEconcentration 40%NEconcentration 95%NNEconcentration 97%NNWconcentration 46%Wconcentration 68%Wconcentration 90%NEconcentration 41%ENEconcentration 94%Econcentration 37%NNWconcentration 91%Wconcentration 77%
Mean wind speed (mph)1913121410109610131412111111617201312282412111492181410
Mean water temperature(°C)12.012.312.712.713.113.714.014.014.614.414.014.114.314.314.115.014.113.112.913.613.012.813.213.213.213.113.113.713.613.9

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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