M2 wave buoy daily means for Dec 2020

Daily means from the M2 wave buoy for Dec 2020, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Thu, Dec 31, 2020, 23:00

Data available: Thu, May 3, 2001 to Sat, Aug 22, 2026

Monthly means for 2020

Period Summary

Hog Says

644 wave-buoy observations covered 28 of 31 days (90%). Typical wave height was 5.4 ft (10th–90th percentile 2.6–9.2 ft), while mean peak wave period was 5.7 seconds (10th–90th percentile 4.1–7.9 seconds). Typical wind was 22.4 mph (10th–90th percentile 12.1–29.9 mph) and mean water temperature was 11.6°C (10th–90th percentile 10.7–12.5°C). All 3,024 checked values passed quality control. Across 10 comparable years, mean wave height was below the same-month mean of 5.8 ft and mean wave period was below the same-month mean of 6.2 seconds.

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

Typical Significant Wave Height

5.4ft

Mean: 5.6 ft

P10–P90: 2.6 — 9.2 ft

Recorded extremes

0.8 — 13.5 ft

Available for 364 of 644 hourly samples

Mean Observed Wave Period

5.7secs

P10–P90: 4.1 — 7.9secs

Recorded extremes

2.6 — 12.7secs

Available for 364 of 644 hourly samples

Typical Observed Wind

WNW, 22.4mph

Mean: 21.7 mph

P10–P90: 12.1 — 29.9 mph

Recorded extremes

4.3 — 46.5 mph

Circular concentration: 35%

Mean Water Temperature

11.6°C

P10–P90: 10.7 — 12.5°C

Recorded extremes

10.6 — 12.6°C

Compared With Previous Decembers

Historical baseline from 6,419 observations across 10 years.

Wave Height: 5.6ft; 0.2ft below mean; Historical mean 5.774ft
Wave Period: 5.7s; 0.5s below mean; Historical mean 6.2s
Water Temperature: 11.6°C; 0.1°C above mean; Historical mean 11.5°C

Show 10th–90th percentile ranges

About M2 wave buoy

M2 (WMO 62091) is part of the Irish Marine Data Buoy Observation Network, managed by the Marine Institute in collaboration with Met Éireann. Moored in the Irish Sea east of Ireland, it provides open-water context for the busy, relatively enclosed waters between the Irish and British coasts.

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

M2 wave buoy daily means Dec 2020Last observation shown Dec 2020
Metric	Dec 1	Dec 2	Dec 3	Dec 4	Dec 5	Dec 6	Dec 7	Dec 8	Dec 9	Dec 10	Dec 11	Dec 12	Dec 13	Dec 14	Dec 15	Dec 16	Dec 17	Dec 18	Dec 19	Dec 20	Dec 21	Dec 22	Dec 23	Dec 24	Dec 25	Dec 26	Dec 27	Dec 28	Dec 29	Dec 30	Dec 31
Mean significant wave height (ft)	3	4	4	9	8	2	2	6	4	6	3	4	7	8	6	9	6	7	-	-	-	3	9	7	3	7	7	6	6	4	4
Mean maximum wave height (ft)	4	5	5	13	12	3	3	10	6	9	5	6	10	11	8	12	8	10	-	-	-	4	12	10	4	10	10	8	9	5	6
Mean peak period (s)	4	4	5	7	7	4	4	6	5	6	6	5	7	8	7	9	8	7	-	-	-	9	7	6	4	6	6	6	6	4	5
Mean zero-crossing period (s)	4	4	4	5	5	3	3	5	4	5	4	4	5	6	5	6	5	5	-	-	-	5	5	5	4	5	5	5	5	4	4
Mean peak wave direction	NNWconcentration 71%	Wconcentration 92%	WSWconcentration 42%	Nconcentration 97%	NNEconcentration 95%	NNEconcentration 92%	Nconcentration 88%	NWconcentration 98%	WSWconcentration 48%	SSEconcentration 94%	Sconcentration 81%	WNWconcentration 98%	Sconcentration 100%	Sconcentration 100%	Sconcentration 99%	Sconcentration 100%	Sconcentration 97%	Sconcentration 99%	-	-	-	Sconcentration 90%	ENEconcentration 93%	NNEconcentration 99%	NWconcentration 55%	SSWconcentration 90%	SWconcentration 87%	NWconcentration 85%	NNWconcentration 93%	NWconcentration 91%	NNWconcentration 92%
Mean wave direction	NNWconcentration 73%	Wconcentration 95%	WSWconcentration 55%	Nconcentration 99%	NNEconcentration 96%	Nconcentration 93%	NNEconcentration 88%	NWconcentration 97%	WSWconcentration 35%	SSEconcentration 97%	Sconcentration 87%	Wconcentration 94%	Sconcentration 99%	Sconcentration 100%	Sconcentration 100%	Sconcentration 98%	Sconcentration 100%	Sconcentration 100%	-	-	-	SSEconcentration 91%	ENEconcentration 94%	Nconcentration 99%	WNWconcentration 65%	SWconcentration 95%	SWconcentration 97%	NWconcentration 85%	NNWconcentration 97%	NNWconcentration 94%	NNWconcentration 91%
Mean directional spread (°)	30.8	21.3	28.1	20.7	21.8	40.3	33.0	25.7	25.3	24.8	29.4	26.2	19.7	18.6	20.9	24.1	24.8	20.0	-	-	-	24.4	23.7	22.9	25.3	25.5	30.1	29.2	25.5	32.5	27.0
Mean wind direction	WNWconcentration 86%	Wconcentration 95%	WNWconcentration 68%	NNWconcentration 95%	NNEconcentration 96%	Nconcentration 89%	NNEconcentration 52%	WNWconcentration 98%	SSWconcentration 53%	SSEconcentration 94%	Wconcentration 82%	Wconcentration 87%	Sconcentration 95%	SSWconcentration 100%	SSWconcentration 97%	Sconcentration 83%	SSWconcentration 94%	Sconcentration 98%	-	-	-	ENEconcentration 97%	NEconcentration 96%	Nconcentration 96%	WNWconcentration 80%	WSWconcentration 96%	Wconcentration 98%	NNWconcentration 88%	NNWconcentration 94%	NWconcentration 95%	NNWconcentration 84%
Mean wind speed (mph)	13	20	19	32	23	9	14	25	20	19	14	19	28	26	22	28	23	25	-	-	-	15	30	24	18	27	26	25	24	17	19
Mean water temperature(°C)	12.6	12.5	12.5	12.3	12.1	12.2	12.2	12.1	11.9	11.8	11.8	11.8	11.8	11.7	11.5	11.5	11.4	11.4	-	-	-	11.2	11.2	11.1	11.0	11.0	10.9	10.7	10.6	10.7	10.6

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The observation data displayed on this page is from the Met Éireann Irish Marine Data Buoy Observation Network.

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

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