St Mary's Sound wave buoy daily averages for Dec 2020last observation shownThu, Dec 31, 2020, 23:00Data available:Sun, Jul 3, 2016 to Wed, Jun 24, 2026Monthly averages for 2020

Average Wave Height

5ft

1.3 — 16.2ft

Average Wave period

5secs

3 — 8secs

Average Wave Direction

WSW

Average Water temperature

12°C

10.7 — 12.2°C

About St Mary's Sound wave buoy

St Mary's Sound (CCO station 113) is an inshore coastal wave monitoring site at 49.8912°N, 6.3125°W. It’s part of the UK’s regional Coastal Monitoring / Channel Coastal Observatory network, placed to characterise nearshore wave climate for flood risk, erosion studies, coastal engineering and local forecasting. These stations commonly use a directional wave buoy (often a Datawell Directional WaveRider class) and report significant wave height, wave period (peak/mean) and wave direction; many also report sea temperature and, where fitted, nearby meteorology.

St Mary's Sound wave buoy daily averages Dec 2020last observation shown Dec 2020
Day	Wave height (ft)	Wave Period (s)	Wave Direction	Water Temp (°C)
Dec 1	2	5	WNW	12.2
Dec 2	2	4	WNW	12.2
Dec 3	4	5	WSW	12.1
Dec 4	4	5	WNW	12.0
Dec 5	4	5	N	11.8
Dec 6	3	5	ESE	11.8
Dec 7	4	5	SSE	11.8
Dec 8	3	4	WNW	11.7
Dec 9	4	5	WSW	11.6
Dec 10	5	5	SW	11.6
Dec 11	5	5	SW	11.6
Dec 12	5	6	WSW	11.6
Dec 13	8	5	SSW	11.6
Dec 14	8	6	SW	11.6
Dec 15	8	6	SW	11.5
Dec 16	10	7	SSW	11.5
Dec 17	7	6	SSW	11.5
Dec 18	10	6	SSW	11.5
Dec 19	9	6	SSW	11.5
Dec 20	6	6	SW	11.4
Dec 21	8	6	SSW	11.4
Dec 22	7	6	SSW	11.5
Dec 23	7	5	SSW	11.5
Dec 24	3	4	NNW	11.4
Dec 25	2	4	SE	11.3
Dec 26	4	4	WSW	11.2
Dec 27	8	6	SW	11.2
Dec 28	6	5	WNW	11.1
Dec 29	4	5	NNW	11.0
Dec 30	3	5	WNW	11.0
Dec 31	3	5	NW	10.8

Realtime data displayed on this page is from the Regional Coastal Monitoring Programme.

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