St Mary's Sound wave buoy observations on Mon, Aug 21, 2023

Hourly readings from the St Mary's Sound wave buoy for Mon, Aug 21, 2023, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Mon, Aug 21, 2023, 23:30

Oldest observation available Sun, Jul 3, 2016

Daily means for Aug 2023

Period Summary

Hog Says

48 wave-buoy observations were recorded during the day. Typical wave height was 2.8 ft (10th–90th percentile 2.4–3.1 ft), while mean peak wave period was 9.5 seconds (10th–90th percentile 8.5–10.2 seconds). Mean water temperature was 15.6°C (10th–90th percentile 15.4–15.8°C). 1 of 192 checked values (0.5%) were excluded by quality control.

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

About St Mary's Sound wave buoy

St Mary's Sound station lies between St Mary's and St Agnes in the Isles of Scilly. The National Network first deployed a Datawell Directional WaveRider here in May 2014, establishing a nearshore record for an archipelago exposed to Atlantic swell and important to local navigation and coastal management.

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

St Mary's Sound wave buoy hourly observations Mon, Aug 21, 2023Last observation shown Mon, Aug 21, 2023
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)	3	3	3	3	3	2	2	2	2	2	3	3	3	3	3	3	2	3	3	3	3	3	3	3	3	3	3	3	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Maximum wave height (ft)	5	5	5	4	4	4	4	3	4	4	4	5	5	4	4	4	4	4	4	4	4	5	4	4	4	4	5	4	4	4	3	4	4	4	5	4	5	5	5	5	4	4	4	4	5	5	4	4
Peak period (s)	9	9	9	11	11	11	10	10	10	10	9	9	9	11	10	10	8	10	11	11	9	8	10	10	10	11	10	9	9	11	10	10	10	-	10	10	9	9	9	7	9	10	9	8	10	8	8	6
Zero-crossing period (s)	6	6	5	5	5	5	5	4	4	5	5	5	5	5	5	5	4	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4	4	-	4	4	4	4	4	4	4	4	4	4	5	5	5	5
Energy period (s)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Reported period (s)	-	6	5	5	5	5	4	4	4	4	5	5	5	5	5	5	4	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5
Wave power, kilowatts per metre	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Peak wave direction	SW	WSW	WSW	WNW	WNW	NNW	NE	NE	NNW	WNW	WNW	NW	NW	NW	NNW	NW	WNW	NW	NW	NW	WSW	SW	W	WNW	W	NW	NW	WSW	WSW	NNW	NNW	NNW	NW	-	NW	NNW	NNW	NW	NNW	NW	NNW	NW	WNW	WSW	W	WSW	W	SW
Directional spread (°)	42.0	50.0	48.0	58.0	58.0	43.0	64.0	72.0	57.0	70.0	64.0	59.0	55.0	42.0	44.0	45.0	66.0	40.0	36.0	53.0	60.0	43.0	57.0	52.0	58.0	65.0	59.0	62.0	62.0	76.0	52.0	48.0	61.0	-	38.0	57.0	49.0	54.0	44.0	54.0	42.0	45.0	68.0	59.0	59.0	48.0	53.0	40.0
Reported wave direction	-	WSW	WSW	WNW	WNW	NNW	NE	NE	NNW	WNW	WNW	NW	NW	NW	NNW	NW	WNW	NW	NW	NW	WSW	SW	W	WNW	W	NW	NW	WSW	WSW	NNW	NNW	NNW	NW	SSW	NW	NNW	NNW	NW	NNW	NW	NNW	NW	WNW	WSW	W	WSW	W	SW
Water temperature(°C)	16.1	16.1	16.1	15.8	15.8	15.7	15.5	15.3	15.5	15.5	15.4	15.7	15.3	15.5	15.9	15.8	15.7	15.7	15.5	15.6	15.5	15.3	15.2	15.4	15.6	15.6	15.7	15.7	15.8	15.8	15.7	15.7	15.8	15.8	15.8	15.7	15.9	15.8	15.7	15.6	15.6	15.7	15.6	15.5	15.6	15.6	15.3	15.4

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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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