M2 wave buoy daily means for Sep 2012

Daily means from the M2 wave buoy for Sep 2012, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sun, Sep 30, 2012, 23:00

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

Monthly means for 2012

Period Summary

Hog Says

715 wave-buoy observations covered all 30 days. Typical wave height was 3.6 ft (10th–90th percentile 1.5–6.7 ft), while mean peak wave period was 5 seconds (10th–90th percentile 3.6–6.9 seconds). Typical wind was 16.7 mph (10th–90th percentile 9.7–23.7 mph) and mean water temperature was 14.9°C (10th–90th percentile 14.4–15.4°C). 1 of 4,289 checked values (0%) were excluded by quality control. Across 2 comparable years, mean wave height was above the same-month mean of 3.7 ft and mean wave period was above the same-month mean of 4.9 seconds.

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

Typical Significant Wave Height

3.6ft

Mean: 3.8 ft

P10–P90: 1.5 — 6.7 ft

Recorded extremes

1 — 11.8 ft

Mean Observed Wave Period

5secs

P10–P90: 3.6 — 6.9secs

Recorded extremes

2.6 — 10.3secs

Available for 714 of 715 hourly samples

Typical Observed Wind

WSW, 16.7mph

Mean: 16.7 mph

P10–P90: 9.7 — 23.7 mph

Recorded extremes

1 — 32.9 mph

Circular concentration: 48%

Mean Water Temperature

14.9°C

P10–P90: 14.4 — 15.4°C

Recorded extremes

13.9 — 16°C

Available for 714 of 715 hourly samples

Compared With Previous Septembers

Historical baseline from 1,288 observations across 2 years.

Wave Height: 3.8ft; 0.1ft above mean; Historical mean 3.74ft
Wave Period: 5s; 0.1s above mean; Historical mean 4.9s
Water Temperature: 14.9°C; 0.6°C above mean; Historical mean 14.3°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 Sep 2012Last observation shown Sep 2012
Metric	Sep 1	Sep 2	Sep 3	Sep 4	Sep 5	Sep 6	Sep 7	Sep 8	Sep 9	Sep 10	Sep 11	Sep 12	Sep 13	Sep 14	Sep 15	Sep 16	Sep 17	Sep 18	Sep 19	Sep 20	Sep 21	Sep 22	Sep 23	Sep 24	Sep 25	Sep 26	Sep 27	Sep 28	Sep 29	Sep 30
Mean significant wave height (ft)	3	2	2	2	2	2	3	3	4	4	4	4	3	4	2	4	4	5	3	3	4	2	4	7	8	QC rejected	4	4	4	6
Mean maximum wave height (ft)	4	3	3	3	3	3	4	4	6	5	6	6	5	6	3	5	6	6	4	4	5	2	5	11	12	13	5	5	5	9
Mean peak period (s)	4	6	5	5	4	4	4	4	5	6	5	5	5	5	4	5	5	5	4	5	5	4	5	7	7	7	5	5	4	7
Mean zero-crossing period (s)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	4	5	5	6	4	4	4	5
Mean peak wave direction	SSWconcentration 78%	SSEconcentration 99%	Sconcentration 97%	Variableconcentration 15%	NNWconcentration 56%	SSWconcentration 60%	SSWconcentration 71%	Sconcentration 97%	Sconcentration 99%	Sconcentration 87%	Wconcentration 91%	Wconcentration 71%	Variableconcentration 29%	Wconcentration 79%	WSWconcentration 68%	SSWconcentration 84%	SWconcentration 87%	WNWconcentration 89%	WNWconcentration 87%	SSWconcentration 85%	NNEconcentration 58%	Variableconcentration 26%	ESEconcentration 86%	NEconcentration 94%	Nconcentration 99%	NNEconcentration 94%	NWconcentration 60%	SWconcentration 80%	Wconcentration 90%	Sconcentration 98%
Mean wave direction	SSWconcentration 88%	SSEconcentration 97%	Sconcentration 99%	Variableconcentration 23%	NNWconcentration 75%	SSWconcentration 72%	SSWconcentration 83%	Sconcentration 98%	Sconcentration 99%	SSWconcentration 85%	Wconcentration 98%	Wconcentration 69%	WSWconcentration 41%	Wconcentration 81%	WSWconcentration 65%	SSWconcentration 96%	SWconcentration 96%	WNWconcentration 88%	WNWconcentration 84%	SSWconcentration 97%	NNEconcentration 59%	Econcentration 52%	ESEconcentration 90%	NEconcentration 94%	Nconcentration 98%	NNEconcentration 95%	NWconcentration 69%	SWconcentration 92%	Wconcentration 91%	Sconcentration 99%
Mean directional spread (°)	27.0	25.8	27.6	30.6	33.5	26.3	27.9	21.7	20.7	22.1	27.1	26.3	30.9	32.4	30.7	27.1	28.5	26.1	29.2	31.8	32.1	36.0	26.3	21.1	22.3	23.8	29.5	28.8	28.7	22.7
Mean wind direction	SWconcentration 87%	Wconcentration 69%	SSWconcentration 85%	WNWconcentration 78%	NWconcentration 66%	SSWconcentration 95%	SWconcentration 74%	Sconcentration 99%	Sconcentration 98%	WSWconcentration 65%	Wconcentration 99%	WNWconcentration 73%	WSWconcentration 80%	WNWconcentration 93%	WSWconcentration 86%	WSWconcentration 86%	SWconcentration 98%	WNWconcentration 97%	Wconcentration 96%	SWconcentration 94%	NNEconcentration 86%	ESEconcentration 59%	ESEconcentration 94%	NEconcentration 90%	Nconcentration 93%	NNEconcentration 94%	Wconcentration 68%	WSWconcentration 94%	Wconcentration 87%	SSWconcentration 97%
Mean wind speed (mph)	14	8	13	12	11	14	14	17	20	13	21	19	16	17	13	18	20	21	16	14	16	8	17	23	26	25	17	19	19	20
Mean water temperature(°C)	14.9	15.2	15.2	15.4	15.4	15.4	15.6	15.6	15.3	15.2	15.1	14.8	14.7	14.7	14.6	14.6	14.6	14.6	14.5	14.8	14.9	14.9	14.9	14.9	14.8	14.8	14.6	14.2	14.3	14.2

Swipe sideways to see more days.

Observation data source

Met Éireann Irish Marine Data Buoy Observation Network

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

› Wave Buoy List