Île de Batz wave buoy observations on Sat, Dec 20, 2025

Hourly readings from the Île de Batz wave buoy for Sat, Dec 20, 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sat, Dec 20, 2025, 23:30

Oldest observation available Wed, Mar 27, 2019

Daily means for Dec 2025

Period Summary

Hog Says

48 wave-buoy observations were recorded during the day. Typical wave height was 5 ft (10th–90th percentile 4.5–8.8 ft), while mean peak wave period was 13.4 seconds (10th–90th percentile 12.2–14.6 seconds). Typical calculated wave power was approximately 13 kW/m (10th–90th percentile 10–46.1 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 Sat, Dec 20, 2025Last observation shown Sat, Dec 20, 2025
Metric	Sat 00:00	Sat 00:30	Sat 01:00	Sat 01:30	Sat 02:00	Sat 02:30	Sat 03:00	Sat 03:30	Sat 04:00	Sat 04:30	Sat 05:00	Sat 05:30	Sat 06:00	Sat 06:30	Sat 07:00	Sat 07:30	Sat 08:00	Sat 08:30	Sat 09:00	Sat 09:30	Sat 10:00	Sat 10:30	Sat 11:00	Sat 11:30	Sat 12:00	Sat 12:30	Sat 13:00	Sat 13:30	Sat 14:00	Sat 14:30	Sat 15:00	Sat 15:30	Sat 16:00	Sat 16:30	Sat 17:00	Sat 17:30	Sat 18:00	Sat 18:30	Sat 19:00	Sat 19:30	Sat 20:00	Sat 20:30	Sat 21:00	Sat 21:30	Sat 22:00	Sat 22:30	Sat 23:00	Sat 23:30
Significant wave height (ft)	8	9	10	10	10	9	9	8	9	8	9	8	8	8	7	7	7	7	6	5	5	5	5	5	5	4	5	5	5	5	5	4	5	4	5	4	4	4	4	5	4	5	4	5	5	4	4	4
Maximum wave height (ft)	13	13	17	13	13	14	12	12	12	13	13	14	15	11	11	14	11	10	8	12	6	7	8	8	8	7	7	7	8	8	9	7	8	8	7	7	8	7	7	8	6	7	6	7	9	6	7	7
Peak period (s)	15	15	16	15	12	14	14	14	14	14	15	15	14	14	15	14	14	14	14	14	14	15	14	14	13	13	13	11	13	12	12	13	11	12	13	13	12	13	13	13	13	13	13	13	13	13	12	12
Average period (s)	14	14	14	13	12	13	13	13	13	12	13	14	13	13	14	13	14	13	13	13	13	13	13	13	12	11	11	11	11	11	11	12	11	11	12	12	11	12	11	12	12	12	11	12	12	11	10	11
Mean period Tm02 (s)	10	10	11	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	10	10	10	10	10	10	9	9	9	9	9	9	8	9	9	8	9	9	9	9	9	9	9	9	9	9	9	9	8	8
Peak wave direction	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	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW
Directional spread (°)	20.2	19.4	18.8	18.4	21.5	18.8	21.6	18.8	19.1	17.9	15.3	16.5	18.8	19.8	20.6	17.1	20.3	18.9	17.0	18.9	24.7	19.9	17.5	18.3	22.0	24.8	25.8	26.4	23.0	23.8	22.6	23.4	23.1	24.2	20.7	20.8	22.6	19.9	24.6	21.0	22.3	21.3	20.0	19.6	15.9	20.8	25.8	24.6
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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