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Chapel Point wave buoy daily means for Dec 2020

Daily means from the Chapel Point wave buoy for Dec 2020, 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

1,472 wave-buoy observations covered all 31 days. Typical wave height was 2.6 ft (10th–90th percentile 1.7–4.9 ft), while mean average of more than one wave period type was 6.6 seconds (10th–90th percentile 3.2–11.8 seconds). Mean water temperature was 7.4°C (10th–90th percentile 6.7–8.4°C). 7 of 5,857 checked values (0.1%) were excluded by quality control. Across 8 comparable years, mean wave height was above the same-month mean of 2.8 ft and mean wave period was above the same-month mean of 6.3 seconds.

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

Typical Significant Wave Height

2.6ft
Mean: 3 ft
P10–P90: 1.7 — 4.9 ft
Recorded extremes

0.9 — 9 ft

Mean Observed Wave Period

6.6secs
P10–P90: 3.2 — 11.8secs
Recorded extremes

1.8 — 18.2secs

Available for 737 of 738 hourly samples

Observed Wave Direction

E

Circular concentration: 41%

Mean Water Temperature

7.4°C
P10–P90: 6.7 — 8.4°C
Recorded extremes

6 — 9.2°C

Compared With Previous Decembers

Historical baseline from 11,336 observations across 8 years.

Wave Height
3ft
0.2ft above mean
Historical mean 2.756ft
Wave Period
6.6s
0.3s above mean
Historical mean 6.3s
Water Temperature
7.4°C
0.3°C above mean
Historical mean 7.1°C

Chart showing grouped wave observations for Chapel Point. 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 Chapel Point wave buoy

Chapel Point is a Channel Coastal Observatory wave station off the Lincolnshire coast near Chapel St Leonards. Its shallow North Sea setting records conditions approaching a low-lying, heavily managed sandy frontage north of Skegness, supporting flood and erosion monitoring.

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

Metrics are rows; days run left to right.
Chapel Point wave buoy daily means Dec 2020Last observation shown
Metric
Mean significant wave height (ft)QC rejected224323212323323244322485332333
Mean maximum wave height (ft)93464444244354343654337128542454
Mean peak period (s)984511131175457544444444678106891099
Mean zero-crossing period (s)5434574443444333344334455433454
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionNNEconcentration 100%NNEconcentration 81%SSEconcentration 78%SEconcentration 46%NEconcentration 81%NNEconcentration 99%NNEconcentration 100%NEconcentration 41%ESEconcentration 53%SEconcentration 91%Econcentration 97%ENEconcentration 99%ESEconcentration 59%Sconcentration 99%Sconcentration 100%SEconcentration 89%Sconcentration 90%Sconcentration 99%Sconcentration 99%Sconcentration 100%SEconcentration 84%NNEconcentration 87%NEconcentration 97%NNEconcentration 99%NNEconcentration 100%SSEconcentration 33%SEconcentration 42%NEconcentration 59%NNEconcentration 96%NNEconcentration 99%NNEconcentration 100%
Mean directional spread (°)22.228.424.625.426.226.422.122.725.625.720.823.427.127.428.329.626.823.625.921.623.424.822.222.821.121.327.434.629.522.925.8
Mean water temperature(°C)8.88.78.58.38.07.97.87.47.37.27.17.27.27.37.37.47.47.57.77.77.67.57.47.16.96.86.96.76.66.46.1

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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.

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 Regional Coastal Monitoring Programme.

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

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