Belle-Île wave buoy observations on Mon, Dec 15, 2025

Hourly readings from the Belle-Île wave buoy for Mon, Dec 15, 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Mon, Dec 15, 2025, 23:30

Oldest observation available Mon, Oct 18, 2010

Daily means for Dec 2025

Period Summary

Hog Says

48 wave-buoy observations were recorded during the day. Typical wave height was 9.5 ft (10th–90th percentile 8.3–10.7 ft), while mean peak wave period was 12 seconds (10th–90th percentile 10.9–12.5 seconds). Typical calculated wave power was approximately 38 kW/m (10th–90th percentile 29.5–47.1 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 Belle-Île wave buoy

Belle-Île is a CANDHIS directional buoy south of Brittany, maintained through the Cerema-coordinated sea-state observatory and research partners. Its open Atlantic position represents conditions approaching Belle-Île and the sheltered-to-exposed transition along the Morbihan coast.

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

Belle-Île wave buoy hourly observations Mon, Dec 15, 2025Last observation shown Mon, Dec 15, 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)	8	8	9	9	8	8	9	8	8	9	8	9	9	9	9	9	9	9	9	10	10	10	9	10	10	10	10	10	10	10	9	10	9	10	10	10	10	10	10	10	10	10	11	11	12	13	12	12
Maximum wave height (ft)	13	12	13	16	11	13	13	12	13	12	10	14	15	15	14	14	14	13	13	13	14	14	13	19	13	18	17	18	17	15	16	14	14	14	13	21	13	18	15	17	14	18	19	17	19	21	17	17
Peak period (s)	12	12	13	12	12	12	12	12	12	13	12	12	12	12	12	12	12	12	12	13	12	13	12	12	12	12	13	12	12	12	12	13	12	13	11	13	13	12	13	12	12	10	12	9	11	10	9	10
Average period (s)	10	10	11	10	10	9	10	9	9	10	9	10	10	10	10	10	10	10	9	10	10	9	9	9	10	10	9	9	9	9	9	9	9	9	9	9	10	9	10	9	9	9	9	9	10	10	9	10
Mean period Tm02 (s)	7	7	7	7	7	6	7	6	6	6	6	7	7	7	7	7	7	7	7	7	7	7	6	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	7	7	7	8	7	7
Peak wave direction	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	WSW	W
Directional spread (°)	26.3	26.8	22.5	29.2	26.0	27.6	27.4	30.0	30.4	28.2	34.3	29.1	32.9	26.8	25.8	25.8	29.0	34.4	33.7	26.4	23.5	27.8	32.2	29.6	25.8	27.4	29.0	29.3	22.9	27.7	28.0	30.1	34.7	27.3	26.8	32.0	26.2	25.7	29.4	28.4	34.6	34.3	25.1	31.0	27.2	26.6	31.4	28.9
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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