M2 wave buoy daily means for Apr 2017

Daily means from the M2 wave buoy for Apr 2017, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sun, Apr 30, 2017, 23:00

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

Monthly means for 2017

Period Summary

Hog Says

718 wave-buoy observations covered all 30 days. Typical wave height was 2.2 ft (10th–90th percentile 0.8–4.9 ft), while mean peak wave period was 4.6 seconds (10th–90th percentile 2.9–6.8 seconds). Typical wind was 12 mph (10th–90th percentile 5.4–19.7 mph) and mean water temperature was 9.4°C (10th–90th percentile 9.2–9.6°C). 4 of 4,307 checked values (0.1%) were excluded by quality control. Across 6 comparable years, mean wave height was below the same-month mean of 3.1 ft and mean wave period was below the same-month mean of 5.2 seconds.

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

Typical Significant Wave Height

2.2ft

Mean: 2.5 ft

P10–P90: 0.8 — 4.9 ft

Recorded extremes

0.4 — 8.1 ft

Mean Observed Wave Period

4.6secs

P10–P90: 2.9 — 6.8secs

Recorded extremes

2.1 — 10.9secs

Available for 714 of 718 hourly samples

Typical Observed Wind

W, 12mph

Mean: 12.1 mph

P10–P90: 5.4 — 19.7 mph

Recorded extremes

0.3 — 29.3 mph

Circular concentration: 42%

Mean Water Temperature

9.4°C

P10–P90: 9.2 — 9.6°C

Recorded extremes

9.1 — 11.2°C

Available for 717 of 718 hourly samples

Compared With Previous Aprils

Historical baseline from 4,273 observations across 6 years.

Wave Height: 2.5ft; 0.6ft below mean; Historical mean 3.084ft
Wave Period: 4.6s; 0.6s below mean; Historical mean 5.2s
Water Temperature: 9.4°C; 1°C above mean; Historical mean 8.4°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 Apr 2017Last observation shown Apr 2017
Metric	Apr 1	Apr 2	Apr 3	Apr 4	Apr 5	Apr 6	Apr 7	Apr 8	Apr 9	Apr 10	Apr 11	Apr 12	Apr 13	Apr 14	Apr 15	Apr 16	Apr 17	Apr 18	Apr 19	Apr 20	Apr 21	Apr 22	Apr 23	Apr 24	Apr 25	Apr 26	Apr 27	Apr 28	Apr 29	Apr 30
Mean significant wave height (ft)	3	3	6	3	2	1	1	1	1	3	3	3	2	2	3	3	2	2	1	1	1	1	1	3	7	4	2	3	3	5
Mean maximum wave height (ft)	4	3	9	5	2	1	0	2	1	4	4	4	3	2	4	4	3	2	1	0	1	2	1	5	10	5	3	4	4	7
Mean peak period (s)	8	6	6	5	4	4	6	3	4	4	4	4	4	3	4	4	4	4	4	4	3	4	4	4	6	5	4	4	5	6
Mean zero-crossing period (s)	5	4	5	4	3	3	4	3	3	4	4	4	3	3	4	4	3	3	3	3	3	3	3	4	5	4	4	4	4	5
Mean peak wave direction	Sconcentration 99%	Sconcentration 54%	Sconcentration 99%	Variableconcentration 28%	NWconcentration 82%	NWconcentration 45%	Variableconcentration 23%	Sconcentration 92%	WSWconcentration 45%	NWconcentration 93%	Wconcentration 85%	Wconcentration 90%	WNWconcentration 74%	SWconcentration 70%	WNWconcentration 99%	WNWconcentration 85%	NNWconcentration 77%	ENEconcentration 86%	Sconcentration 72%	WSWconcentration 39%	WNWconcentration 71%	NNEconcentration 84%	SEconcentration 37%	NWconcentration 65%	Nconcentration 97%	NNEconcentration 97%	NNWconcentration 77%	NNEconcentration 51%	Sconcentration 98%	ESEconcentration 78%
Mean wave direction	Sconcentration 93%	SWconcentration 39%	Sconcentration 100%	NWconcentration 57%	WNWconcentration 93%	NNWconcentration 55%	SSEconcentration 52%	Sconcentration 99%	SWconcentration 69%	NWconcentration 95%	WNWconcentration 85%	Wconcentration 92%	NWconcentration 78%	SWconcentration 87%	WNWconcentration 98%	Wconcentration 81%	NNWconcentration 71%	ENEconcentration 94%	Sconcentration 91%	SWconcentration 62%	WNWconcentration 76%	NNEconcentration 87%	ESEconcentration 48%	NWconcentration 66%	Nconcentration 98%	NNEconcentration 98%	NNWconcentration 88%	NNEconcentration 50%	Sconcentration 99%	ESEconcentration 92%
Mean directional spread (°)	24.1	28.4	19.3	31.5	27.7	40.0	39.3	30.2	36.3	26.1	26.5	29.6	32.9	36.2	26.5	32.7	28.5	26.5	30.1	30.4	27.9	32.8	35.2	20.9	21.4	30.1	29.9	30.1	24.1	33.9
Mean wind direction	WNWconcentration 66%	WSWconcentration 47%	Sconcentration 99%	NWconcentration 90%	NWconcentration 83%	WNWconcentration 80%	WSWconcentration 60%	Sconcentration 99%	SWconcentration 62%	NWconcentration 86%	Wconcentration 94%	WNWconcentration 86%	Wconcentration 84%	WSWconcentration 84%	WNWconcentration 96%	Wconcentration 92%	NNWconcentration 88%	Econcentration 72%	SSWconcentration 91%	Wconcentration 90%	WNWconcentration 87%	NEconcentration 54%	Variableconcentration 15%	NWconcentration 82%	Nconcentration 96%	Nconcentration 90%	NWconcentration 97%	Wconcentration 56%	SSEconcentration 93%	ESEconcentration 96%
Mean wind speed (mph)	10	12	23	14	10	7	5	11	9	13	15	16	11	11	15	14	11	10	9	7	9	7	6	17	24	13	13	11	17	15
Mean water temperature(°C)	9.2	9.3	9.2	9.3	9.2	9.2	9.4	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.4	9.4	9.4	9.4	9.4	9.6	9.6	10.0	9.7	9.6	9.5	9.5	9.5	9.6	9.5	9.5

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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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