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Chapel Point wave buoy daily means for Apr 2020

Daily means from the Chapel Point wave buoy for Apr 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

1,437 wave-buoy observations covered all 30 days. Typical wave height was 2.3 ft (10th–90th percentile 0.9–4.6 ft), while mean average of more than one wave period type was 7.5 seconds (10th–90th percentile 3.7–11.8 seconds). Mean water temperature was 9.5°C (10th–90th percentile 7.6–11.1°C). 30 of 5,689 checked values (0.5%) were excluded by quality control. Across 6 comparable years, mean wave height was above the same-month mean of 2.5 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

2.3ft
Mean: 2.6 ft
P10–P90: 0.9 — 4.6 ft
Recorded extremes

0.4 — 7.6 ft

Available for 718 of 719 hourly samples

Mean Observed Wave Period

7.5secs
P10–P90: 3.7 — 11.8secs
Recorded extremes

1.7 — 14.3secs

Available for 713 of 719 hourly samples

Observed Wave Direction

NE

Circular concentration: 85%

Mean Water Temperature

9.5°C
P10–P90: 7.6 — 11.1°C
Recorded extremes

7.3 — 11.4°C

Available for 718 of 719 hourly samples

Compared With Previous Aprils

Historical baseline from 7,972 observations across 6 years.

Wave Height
2.6ft
0.1ft above mean
Historical mean 2.493ft
Wave Period
7.5s
1.2s above mean
Historical mean 6.3s
Water Temperature
9.5°C
0.8°C above mean
Historical mean 8.7°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 Apr 2020Last observation shown
Metric
Mean significant wave height (ft)223332112211642243356421222232
Mean maximum wave height (ft)345443112322963265589642322443
Mean peak period (s)1011111210447561068121195866766477510105
Mean zero-crossing period (s)546643333444565444445443443443
Mean energy period (s)------------------------------
Mean wave power, kilowatts per metre------------------------------
Mean peak wave directionNNEconcentration 99%NNEconcentration 100%NNEconcentration 100%NNEconcentration 100%NEconcentration 91%ESEconcentration 71%Econcentration 92%NEconcentration 87%NNEconcentration 93%ENEconcentration 93%NNEconcentration 97%NNEconcentration 96%NNEconcentration 100%NNEconcentration 100%NNEconcentration 100%NEconcentration 92%ENEconcentration 99%NEconcentration 97%ENEconcentration 98%ENEconcentration 100%ENEconcentration 100%ENEconcentration 100%ENEconcentration 99%NNEconcentration 94%NEconcentration 99%NEconcentration 75%NNEconcentration 99%NNEconcentration 99%NNEconcentration 100%SSEconcentration 68%
Mean directional spread (°)22.023.920.923.123.928.135.942.936.429.936.735.221.022.321.822.327.124.328.022.621.822.024.437.124.525.928.626.020.023.3
Mean water temperature(°C)7.57.67.67.87.88.18.38.68.88.99.19.59.59.59.69.89.79.79.810.010.210.310.510.710.911.011.111.111.011.1

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.

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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