Île de Batz wave buoy observations on Mon, Jul 21, 2025

Hourly readings from the Île de Batz wave buoy for Mon, Jul 21, 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Mon, Jul 21, 2025, 23:30

Oldest observation available Wed, Mar 27, 2019

Daily means for Jul 2025

Period Summary

Hog Says

48 wave-buoy observations were recorded during the day. Typical wave height was 5.8 ft (10th–90th percentile 4–6.7 ft), while mean peak wave period was 9.6 seconds (10th–90th percentile 9.1–10.1 seconds). Typical calculated wave power was approximately 12.3 kW/m (10th–90th percentile 5.3–17.5 kW/m), derived from significant wave height and energy period. All 144 checked values passed quality control.

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

About Île de Batz wave buoy

Île de Batz is a CANDHIS directional buoy off northern Brittany, within the French national sea-state observatory coordinated by Cerema. The station sits at the western entrance to the English Channel, where Atlantic swell rounds Brittany towards the exposed Finistère and Channel coasts.

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

Île de Batz wave buoy hourly observations Mon, Jul 21, 2025Last observation shown Mon, Jul 21, 2025
Metric	Mon 00:00	Mon 00:30	Mon 01:00	Mon 01:30	Mon 02:00	Mon 02:30	Mon 03:00	Mon 03:30	Mon 04:00	Mon 04:30	Mon 05:00	Mon 05:30	Mon 06:00	Mon 06:30	Mon 07:00	Mon 07:30	Mon 08:00	Mon 08:30	Mon 09:00	Mon 09:30	Mon 10:00	Mon 10:30	Mon 11:00	Mon 11:30	Mon 12:00	Mon 12:30	Mon 13:00	Mon 13:30	Mon 14:00	Mon 14:30	Mon 15:00	Mon 15:30	Mon 16:00	Mon 16:30	Mon 17:00	Mon 17:30	Mon 18:00	Mon 18:30	Mon 19:00	Mon 19:30	Mon 20:00	Mon 20:30	Mon 21:00	Mon 21:30	Mon 22:00	Mon 22:30	Mon 23:00	Mon 23:30
Significant wave height (ft)	4	4	4	3	4	4	4	4	4	4	4	4	4	5	5	5	6	6	6	5	7	7	6	7	7	7	7	7	6	5	6	6	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Maximum wave height (ft)	6	7	6	6	7	6	6	7	7	6	6	6	7	7	8	9	9	8	9	9	12	11	11	10	10	10	10	11	9	9	8	10	12	9	9	9	9	9	10	9	10	9	10	9	8	9	10	10
Peak period (s)	8	8	9	9	9	9	10	11	10	10	10	10	11	10	10	9	10	10	10	10	10	10	10	10	10	10	10	9	10	10	9	10	10	9	9	10	10	10	10	10	10	10	9	10	10	9	9	9
Average period (s)	7	7	7	7	8	8	8	9	9	8	8	7	8	8	9	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	9	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Mean period Tm02 (s)	6	6	5	5	6	6	6	6	6	5	5	5	5	6	7	7	7	7	7	7	8	7	7	7	7	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Peak wave direction	WNW	WNW	WNW	W	WNW	WNW	WNW	WNW	WNW	WNW	W	W	WNW	WNW	WNW	W	W	WNW	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW
Directional spread (°)	25.9	25.3	23.9	28.2	25.4	27.2	24.7	21.4	23.8	21.5	22.4	26.1	32.6	20.2	21.3	20.0	20.0	26.6	23.6	23.0	18.7	19.8	24.3	20.8	20.7	23.2	25.9	24.5	26.8	25.8	24.2	20.8	20.9	19.6	20.7	19.8	22.4	23.0	21.5	21.1	24.0	23.5	21.2	23.1	22.3	22.1	20.1	21.7
Water temperature(°C)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

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The observation data displayed on this page is from the Cerema CANDHIS coastal wave observatory.

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

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