Chesil wave buoy daily means for Oct 2025

Daily means from the Chesil wave buoy for Oct 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Fri, Oct 31, 2025, 23:30

Data available: Fri, Dec 22, 2006 to Fri, Aug 21, 2026

Monthly means for 2025

Period Summary

Hog Says

1,490 wave-buoy observations covered all 31 days. Typical wave height was 2.7 ft (10th–90th percentile 0.9–7.4 ft), while mean average of more than one wave period type was 7.6 seconds (10th–90th percentile 4.8–11.8 seconds). Mean water temperature was 15°C (10th–90th percentile 13.8–15.9°C). 14 of 5,889 checked values (0.2%) were excluded by quality control. Across 15 comparable years, mean wave height was below the same-month mean of 3.6 ft and mean wave period was below the same-month mean of 8 seconds.

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

Typical Significant Wave Height

2.7ft

Mean: 3.4 ft

P10–P90: 0.9 — 7.4 ft

Recorded extremes

0.5 — 11.8 ft

Available for 743 of 745 hourly samples

Mean Observed Wave Period

7.6secs

P10–P90: 4.8 — 11.8secs

Recorded extremes

3.3 — 16.7secs

Available for 743 of 745 hourly samples

Observed Wave Direction

SSW

Circular concentration: 90%

Mean Water Temperature

15°C

P10–P90: 13.8 — 15.9°C

Recorded extremes

13.5 — 16.6°C

Available for 743 of 745 hourly samples

Compared With Previous Octobers

Historical baseline from 22,242 observations across 15 years.

Wave Height: 3.4ft; 0.2ft below mean; Historical mean 3.576ft
Wave Period: 7.6s; 0.4s below mean; Historical mean 8s
Water Temperature: 15°C; 0.5°C below mean; Historical mean 15.5°C

Show 10th–90th percentile ranges

About Chesil wave buoy

Chesil is a Channel Coastal Observatory National Network wave station off Dorset's exposed Jurassic Coast. It records waves approaching Chesil Beach and the western side of Portland, providing a nearshore reference for the long shingle barrier and the communities and infrastructure behind it.

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

Chesil wave buoy daily means Oct 2025Last observation shown Oct 2025
Metric	Oct 1	Oct 2	Oct 3	Oct 4	Oct 5	Oct 6	Oct 7	Oct 8	Oct 9	Oct 10	Oct 11	Oct 12	Oct 13	Oct 14	Oct 15	Oct 16	Oct 17	Oct 18	Oct 19	Oct 20	Oct 21	Oct 22	Oct 23	Oct 24	Oct 25	Oct 26	Oct 27	Oct 28	Oct 29	Oct 30	Oct 31
Mean significant wave height (ft)	1	2	7	8	5	3	2	2	1	1	1	1	1	1	1	1	1	3	5	7	5	2	6	7	4	4	5	5	3	5	8
Mean maximum wave height (ft)	2	3	10	13	8	4	3	3	2	2	1	2	2	2	1	2	2	4	7	11	7	4	9	11	6	6	7	8	5	8	12
Mean peak period (s)	11	8	6	8	6	5	12	13	11	10	9	5	6	6	10	8	5	5	6	8	7	8	10	8	6	5	6	6	5	6	10
Mean zero-crossing period (s)	5	4	5	5	4	4	5	5	5	6	5	4	5	5	5	5	4	4	4	5	5	5	5	5	4	4	4	4	4	4	6
Mean energy period (s)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean wave power, kilowatts per metre	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean peak wave direction	SSWconcentration 86%	SSWconcentration 93%	SWconcentration 99%	SWconcentration 100%	SWconcentration 99%	SWconcentration 99%	SWconcentration 99%	SWconcentration 99%	SWconcentration 98%	SWconcentration 98%	SSWconcentration 98%	SSEconcentration 99%	SSEconcentration 99%	SSEconcentration 98%	SSWconcentration 93%	Sconcentration 92%	SSEconcentration 99%	Sconcentration 100%	Sconcentration 97%	SWconcentration 100%	SWconcentration 100%	SWconcentration 100%	SWconcentration 100%	SWconcentration 100%	WSWconcentration 93%	SWconcentration 98%	SWconcentration 99%	SWconcentration 100%	SWconcentration 96%	SSWconcentration 96%	SWconcentration 99%
Mean directional spread (°)	64.6	46.0	20.5	16.5	19.8	24.6	52.6	54.4	52.2	57.1	56.9	29.3	29.7	33.4	54.7	41.7	31.0	22.9	20.8	17.6	19.3	38.4	25.2	16.2	19.9	22.1	19.1	18.2	24.7	20.2	16.0
Mean water temperature(°C)	16.2	16.1	16.1	15.8	15.6	15.6	15.7	15.7	15.6	15.5	15.5	15.4	15.4	15.4	15.3	15.2	15.2	15.1	15.1	15.0	14.8	14.8	14.7	14.1	13.9	13.8	13.7	13.7	13.7	13.8	13.8

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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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