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Chapel Point wave buoy daily means for Jul 2021

Daily means from the Chapel Point wave buoy for Jul 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

1,482 wave-buoy observations covered all 31 days. Typical wave height was 1.6 ft (10th–90th percentile 0.8–3 ft), while mean average of more than one wave period type was 4.8 seconds (10th–90th percentile 2.9–6.9 seconds). Mean water temperature was 18.1°C (10th–90th percentile 16.4–19.4°C). 1 of 5,912 checked values (0%) were excluded by quality control. Across 9 comparable years, mean wave height was the same as the same-month mean of 1.8 ft and mean wave period was below the same-month mean of 5 seconds.

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

Typical Significant Wave Height

1.6ft
Mean: 1.8 ft
P10–P90: 0.8 — 3 ft
Recorded extremes

0.5 — 4.6 ft

Mean Observed Wave Period

4.8secs
P10–P90: 2.9 — 6.9secs
Recorded extremes

1.7 — 13.3secs

Observed Wave Direction

ENE

Circular concentration: 61%

Mean Water Temperature

18.1°C
P10–P90: 16.4 — 19.4°C
Recorded extremes

15.9 — 19.9°C

Compared With Previous Julys

Historical baseline from 12,664 observations across 9 years.

Wave Height
1.8ft
0ft below mean
Historical mean 1.837ft
Wave Period
4.8s
0.2s below mean
Historical mean 5s
Water Temperature
18.1°C
0.4°C above mean
Historical mean 17.7°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 Jul 2021Last observation shown
Metric
Mean significant wave height (ft)4221222111112333212112232211223
Mean maximum wave height (ft)5332243112213554312222243222334
Mean peak period (s)76553444433455576555610744553355
Mean zero-crossing period (s)4433333333333444443334434433334
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionNNEconcentration 99%NEconcentration 88%Econcentration 94%ENEconcentration 96%SSEconcentration 81%SSEconcentration 82%Sconcentration 79%ENEconcentration 71%ENEconcentration 78%Econcentration 92%ESEconcentration 93%ENEconcentration 92%NNEconcentration 87%Nconcentration 99%NNEconcentration 98%NEconcentration 99%NEconcentration 99%NEconcentration 97%Econcentration 73%ENEconcentration 85%NEconcentration 87%NNEconcentration 96%NEconcentration 96%NEconcentration 96%NEconcentration 93%NEconcentration 83%ENEconcentration 55%Sconcentration 76%SWconcentration 57%ENEconcentration 69%NNEconcentration 99%
Mean directional spread (°)22.124.227.527.026.225.525.138.238.735.334.534.328.525.425.823.625.934.827.127.633.525.226.433.935.931.835.234.733.129.922.6
Mean water temperature(°C)16.116.216.216.616.616.616.717.017.317.517.717.817.918.018.118.118.518.718.818.919.119.319.419.319.319.319.419.319.118.918.9

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.

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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