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Dawlish wave buoy daily means for Apr 2019

Daily means from the Dawlish wave buoy for Apr 2019, 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 1.6 ft (10th–90th percentile 0.7–5 ft), while mean average of more than one wave period type was 6.3 seconds (10th–90th percentile 3–11.8 seconds). Mean water temperature was 11.1°C (10th–90th percentile 10.3–12°C). 31 of 5,694 checked values (0.5%) were excluded by quality control. Across 8 comparable years, mean wave height was above the same-month mean of 1.7 ft and mean wave period was below the same-month mean of 6.9 seconds.

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

Typical Significant Wave Height

1.6ft
Mean: 2.3 ft
P10–P90: 0.7 — 5 ft
Recorded extremes

0.4 — 9.8 ft

Mean Observed Wave Period

6.3secs
P10–P90: 3 — 11.8secs
Recorded extremes

1.7 — 16.7secs

Available for 714 of 720 hourly samples

Observed Wave Direction

SE

Circular concentration: 86%

Mean Water Temperature

11.1°C
P10–P90: 10.3 — 12°C
Recorded extremes

10.1 — 15.3°C

Compared With Previous Aprils

Historical baseline from 11,169 observations across 8 years.

Wave Height
2.3ft
0.6ft above mean
Historical mean 1.673ft
Wave Period
6.3s
0.6s below mean
Historical mean 6.9s
Water Temperature
11.1°C
0.9°C above mean
Historical mean 10.2°C

Chart showing grouped wave observations for Dawlish. 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 Dawlish wave buoy

Dawlish is a Channel Coastal Observatory National Network wave station in the western part of Lyme Bay off south Devon. It provides nearshore context for waves reaching the Dawlish and Teignmouth frontage, including the exposed coastal railway and beaches backed by cliffs and urban development.

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.
Dawlish wave buoy daily means Apr 2019Last observation shown
Metric
Mean significant wave height (ft)311264311222QC rejected67213111111422111
Mean maximum wave height (ft)41141065213337911324211212733112
Mean peak period (s)75757563656656777568137596751273
Mean zero-crossing period (s)434354433444445444444334433543
Mean energy period (s)------------------------------
Mean wave power, kilowatts per metre------------------------------
Mean peak wave directionESEconcentration 100%SSEconcentration 40%SSEconcentration 69%Sconcentration 99%SEconcentration 98%ESEconcentration 100%SEconcentration 98%SEconcentration 91%SSEconcentration 85%ESEconcentration 98%ESEconcentration 100%SEconcentration 98%ESEconcentration 100%ESEconcentration 100%ESEconcentration 100%SEconcentration 94%SSEconcentration 96%ESEconcentration 100%SEconcentration 96%SSEconcentration 95%SSEconcentration 96%SEconcentration 90%SEconcentration 93%Sconcentration 99%SSEconcentration 98%Sconcentration 98%SWconcentration 74%Sconcentration 99%SEconcentration 89%SEconcentration 99%
Mean directional spread (°)18.124.731.023.922.523.123.236.329.821.820.822.520.718.417.025.228.324.028.531.738.332.834.131.425.425.225.133.430.030.4
Mean water temperature(°C)10.710.710.310.310.310.310.410.910.910.810.910.910.710.510.310.510.710.912.212.612.611.912.012.011.911.611.011.011.311.6

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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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