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Rustington wave buoy monthly means for 2018

Monthly means from the Rustington wave buoy for 2018, including available wave height, period, direction, wind and sea temperature data.

Last observation shown

Data available:  to 

Latest

Period Summary

Programmatically generated summary. Hog Says

8,392 wave-buoy observations covered 362 of 365 days (99%). Typical wave height was 2.2 ft (10th–90th percentile 0.9–5.3 ft), while the reported wave period averaged 7.1 seconds (10th–90th percentile 3–13 seconds). Mean water temperature was 12.4°C (10th–90th percentile 6.5–20.5°C). 3,027 of 33,564 checked values (9%) were excluded by quality control.

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

Typical Significant Wave Height

2.2ft
Mean: 2.7 ft
P10–P90: 0.9 — 5.3 ft
Recorded extremes

0.3 — 13.4 ft

Available for 8,391 of 8,392 hourly samples

Mean Observed Wave Period

7.1secs
P10–P90: 3 — 13secs
Recorded extremes

2 — 22secs

Available for 8,227 of 8,392 hourly samples

Observed Wave Direction

SSW

Circular concentration: 70%

Mean Water Temperature

12.4°C
P10–P90: 6.5 — 20.5°C
Recorded extremes

4.4 — 22.2°C

Available for 5,531 of 8,392 hourly samples

Chart showing grouped wave observations for Rustington. Use the table on this page for a text version of the same measurements. To open daily observations, use a linked month name in the table.

About Rustington wave buoy

Rustington is a National Network Datawell Directional WaveRider in about 9.9 metres of water off West Sussex. First deployed on 15 July 2003, it provides a long nearshore record for the low-lying frontage between Littlehampton and Worthing, where beaches form an important part of the coastal defences.

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

Metrics are rows; months run left to right.
Rustington wave buoy monthly means 2018Last observation shown
Metric
Mean significant wave height (ft)433222122244
Mean maximum wave height (ft)------------
Mean peak period (s)------------
Mean zero-crossing period (s)------------
Mean energy period (s)------------
Mean reported period (s)987976555788
Mean wave power, kilowatts per metre------------
Mean peak wave direction------------
Mean directional spread (°)------------
Mean reported wave directionSSWconcentration 87%Sconcentration 61%Sconcentration 75%SSWconcentration 81%Sconcentration 55%Sconcentration 54%SSWconcentration 62%SWconcentration 81%SSWconcentration 63%SSWconcentration 68%Sconcentration 76%SSWconcentration 90%
Mean water temperature(°C)8.36.96.19.212.616.520.120.1----

Swipe sideways to see more months.

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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