Bracklesham Bay wave buoy daily means for Jul 2018

Daily means from the Bracklesham Bay wave buoy for Jul 2018, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Tue, Jul 31, 2018, 23:30

Data available: Fri, Aug 22, 2008 to Sat, Aug 22, 2026

Monthly means for 2018

Period Summary

Hog Says

1,486 wave-buoy observations covered all 31 days. Typical wave height was 0.9 ft (10th–90th percentile 0.5–2.3 ft), while mean average of more than one wave period type was 5.2 seconds (10th–90th percentile 2.5–9.4 seconds). Mean water temperature was 20.8°C (10th–90th percentile 19.7–21.8°C). 10 of 5,866 checked values (0.2%) were excluded by quality control. Across 8 comparable years, mean wave height was below the same-month mean of 1.9 ft and mean wave period was below the same-month mean of 5.8 seconds.

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

Typical Significant Wave Height

0.9ft

Mean: 1.3 ft

P10–P90: 0.5 — 2.3 ft

Recorded extremes

0.3 — 7.8 ft

Available for 740 of 744 hourly samples

Mean Observed Wave Period

5.2secs

P10–P90: 2.5 — 9.4secs

Recorded extremes

1.7 — 18.2secs

Available for 737 of 744 hourly samples

Observed Wave Direction

SSW

Circular concentration: 88%

Mean Water Temperature

20.8°C

P10–P90: 19.7 — 21.8°C

Recorded extremes

18.6 — 22.8°C

Available for 743 of 744 hourly samples

Compared With Previous Julys

Historical baseline from 11,536 observations across 8 years.

Wave Height: 1.3ft; 0.6ft below mean; Historical mean 1.903ft
Wave Period: 5.2s; 0.6s below mean; Historical mean 5.8s
Water Temperature: 20.8°C; 2.4°C above mean; Historical mean 18.4°C

Show 10th–90th percentile ranges

About Bracklesham Bay wave buoy

Bracklesham Bay is a Channel Coastal Observatory National Network wave station off the West Sussex coast. Its nearshore position records conditions entering the broad bay between Selsey and Hayling Island, supporting coastal management along an exposed beach frontage west of Chichester Harbour.

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

Bracklesham Bay wave buoy daily means Jul 2018Last observation shown Jul 2018
Metric	Jul 1	Jul 2	Jul 3	Jul 4	Jul 5	Jul 6	Jul 7	Jul 8	Jul 9	Jul 10	Jul 11	Jul 12	Jul 13	Jul 14	Jul 15	Jul 16	Jul 17	Jul 18	Jul 19	Jul 20	Jul 21	Jul 22	Jul 23	Jul 24	Jul 25	Jul 26	Jul 27	Jul 28	Jul 29	Jul 30	Jul 31
Mean significant wave height (ft)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	1	1	1	1	1	1	1	1	1	1	5	6	3	2
Mean maximum wave height (ft)	1	1	2	1	2	1	1	1	1	1	1	1	1	1	1	2	3	2	1	1	2	2	2	1	1	1	2	8	9	5	3
Mean peak period (s)	6	7	4	4	3	3	3	6	5	4	4	7	5	4	7	6	4	9	8	4	4	5	4	4	3	6	7	6	6	8	7
Mean zero-crossing period (s)	4	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	3	3	3	3	3	3	3	3	4	5	4	3
Mean energy period (s)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean wave power, kilowatts per metre	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean peak wave direction	Sconcentration 96%	Sconcentration 64%	SSEconcentration 79%	Sconcentration 93%	SWconcentration 91%	SWconcentration 98%	SWconcentration 95%	SWconcentration 99%	SSWconcentration 95%	Sconcentration 84%	SSWconcentration 81%	SSWconcentration 99%	SSWconcentration 94%	SSWconcentration 92%	SWconcentration 97%	SWconcentration 89%	WSWconcentration 90%	SSWconcentration 99%	SSWconcentration 99%	Sconcentration 96%	SWconcentration 98%	SWconcentration 94%	SWconcentration 99%	SWconcentration 97%	WSWconcentration 91%	SSWconcentration 88%	SWconcentration 94%	SWconcentration 99%	SSWconcentration 99%	SSWconcentration 99%	SSWconcentration 99%
Mean directional spread (°)	29.6	29.2	26.4	28.1	25.1	27.5	26.0	26.0	28.2	28.9	28.9	27.7	26.5	30.9	27.5	28.6	22.4	23.8	21.8	27.0	22.0	21.1	22.3	25.1	26.0	27.1	25.0	19.1	20.7	22.0	23.5
Mean water temperature(°C)	19.5	19.5	19.4	19.7	20.0	20.4	20.8	21.2	21.1	21.1	20.8	20.7	20.8	21.0	21.0	21.1	20.8	20.6	20.9	20.8	21.1	21.2	21.4	21.7	21.7	22.0	21.9	21.4	20.5	20.1	20.2

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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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