M2 wave buoy daily means for Sep 2015

Daily means from the M2 wave buoy for Sep 2015, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Wed, Sep 30, 2015, 23:00

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

Monthly means for 2015

Period Summary

Hog Says

717 wave-buoy observations covered all 30 days. Typical wave height was 2.6 ft (10th–90th percentile 1–4.3 ft), while mean peak wave period was 4.7 seconds (10th–90th percentile 3.3–6.2 seconds). Typical wind was 12.8 mph (10th–90th percentile 6.2–20 mph) and mean water temperature was 13.9°C (10th–90th percentile 13.3–14.3°C). 2 of 4,302 checked values (0%) were excluded by quality control. Across 4 comparable years, mean wave height was below the same-month mean of 3.6 ft and mean wave period was below the same-month mean of 5 seconds.

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

Typical Significant Wave Height

2.6ft

Mean: 2.6 ft

P10–P90: 1 — 4.3 ft

Recorded extremes

0.4 — 6.9 ft

Mean Observed Wave Period

4.7secs

P10–P90: 3.3 — 6.2secs

Recorded extremes

2.1 — 10.8secs

Available for 715 of 717 hourly samples

Typical Observed Wind

Variable, 12.8mph

Mean: 13.1 mph

P10–P90: 6.2 — 20 mph

Recorded extremes

1 — 27.3 mph

Circular concentration: 10%

Mean Water Temperature

13.9°C

P10–P90: 13.3 — 14.3°C

Recorded extremes

12.9 — 14.7°C

Compared With Previous Septembers

Historical baseline from 2,704 observations across 4 years.

Wave Height: 2.6ft; 1ft below mean; Historical mean 3.576ft
Wave Period: 4.7s; 0.3s below mean; Historical mean 5s
Water Temperature: 13.9°C; 0.7°C below mean; Historical mean 14.6°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 2015Last observation shown Sep 2015
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	4	5	4	4	3	1	1	2	3	3	4	3	3	3	1	2	2	1	3	3	4	3	4	3	1	1	2	2	3
Mean maximum wave height (ft)	5	5	7	6	6	4	1	0	3	4	5	6	4	5	5	2	2	3	1	4	5	5	4	6	4	1	1	3	2	3
Mean peak period (s)	5	5	5	5	5	5	4	4	5	4	4	5	5	7	5	5	5	4	6	4	6	5	4	4	4	4	4	4	4	5
Mean zero-crossing period (s)	4	4	4	4	4	4	3	3	4	4	4	4	4	4	4	4	3	3	4	4	4	4	4	4	4	3	3	3	4	4
Mean peak wave direction	Nconcentration 95%	NNWconcentration 93%	NNWconcentration 96%	Nconcentration 97%	Nconcentration 96%	NNEconcentration 98%	Nconcentration 84%	SSEconcentration 35%	ESEconcentration 72%	Econcentration 73%	ESEconcentration 77%	Sconcentration 56%	Sconcentration 98%	ESEconcentration 43%	Nconcentration 62%	ENEconcentration 36%	SWconcentration 72%	WNWconcentration 41%	SSEconcentration 59%	Sconcentration 99%	Sconcentration 84%	NWconcentration 82%	SWconcentration 47%	SWconcentration 96%	SWconcentration 74%	SSEconcentration 90%	SSEconcentration 88%	SSEconcentration 88%	Econcentration 69%	ENEconcentration 85%
Mean wave direction	Nconcentration 99%	NNWconcentration 98%	NNWconcentration 99%	Nconcentration 99%	Nconcentration 96%	Nconcentration 100%	Nconcentration 93%	ESEconcentration 65%	ESEconcentration 93%	ESEconcentration 90%	ESEconcentration 91%	Sconcentration 73%	Sconcentration 98%	Econcentration 67%	Nconcentration 68%	ENEconcentration 56%	SWconcentration 59%	NWconcentration 42%	SEconcentration 91%	Sconcentration 100%	SSWconcentration 94%	NWconcentration 78%	SWconcentration 50%	SWconcentration 99%	SWconcentration 88%	SSEconcentration 96%	SSEconcentration 99%	SSEconcentration 96%	ESEconcentration 85%	ENEconcentration 98%
Mean directional spread (°)	24.6	29.4	27.3	24.6	21.9	24.2	30.1	34.3	38.8	40.0	36.2	33.2	26.0	26.9	31.1	40.3	27.9	28.8	35.6	24.3	25.0	25.5	26.5	29.1	34.6	33.8	33.8	33.9	45.8	28.4
Mean wind direction	NNWconcentration 98%	NWconcentration 98%	NNWconcentration 96%	NNWconcentration 97%	Nconcentration 95%	NWconcentration 82%	NNWconcentration 84%	ESEconcentration 91%	ESEconcentration 84%	ESEconcentration 99%	SEconcentration 97%	SSWconcentration 66%	SSEconcentration 73%	NEconcentration 81%	WNWconcentration 72%	NNEconcentration 72%	WSWconcentration 79%	NWconcentration 94%	SWconcentration 42%	SSWconcentration 99%	WSWconcentration 85%	NWconcentration 99%	WSWconcentration 88%	WSWconcentration 98%	WSWconcentration 88%	SSEconcentration 96%	SSEconcentration 95%	SEconcentration 95%	SEconcentration 60%	ENEconcentration 97%
Mean wind speed (mph)	15	17	18	17	17	11	7	6	10	12	15	17	13	17	15	7	12	10	6	17	15	19	14	20	13	10	10	13	9	14
Mean water temperature(°C)	13.5	13.5	13.4	13.4	13.5	13.4	13.5	13.8	13.5	14.0	14.2	13.8	13.9	13.9	14.0	14.1	14.2	14.2	14.3	14.2	14.2	14.2	14.2	14.1	14.1	14.1	14.1	14.1	14.2	14.2

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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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