M2 wave buoy daily means for Sep 2023

Daily means from the M2 wave buoy for Sep 2023, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sat, Sep 30, 2023, 23:00

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

Monthly means for 2023

Period Summary

Hog Says

700 wave-buoy observations covered all 30 days. Typical wave height was 3.1 ft (10th–90th percentile 1.2–7.7 ft), while mean peak wave period was 6.2 seconds (10th–90th percentile 3.2–9.5 seconds). Typical wind was 14.5 mph (10th–90th percentile 4.7–26.5 mph) and mean water temperature was 15.8°C (10th–90th percentile 15.2–17°C). 3 of 4,200 checked values (0.1%) were excluded by quality control. Across 12 comparable years, mean wave height was above the same-month mean of 3.3 ft and mean wave period was above the same-month mean of 5.1 seconds.

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

Typical Significant Wave Height

3.1ft

Mean: 3.9 ft

P10–P90: 1.2 — 7.7 ft

Recorded extremes

0.4 — 16.5 ft

Mean Observed Wave Period

6.2secs

P10–P90: 3.2 — 9.5secs

Recorded extremes

2.5 — 14.3secs

Available for 697 of 700 hourly samples

Typical Observed Wind

Variable, 14.5mph

Mean: 15.5 mph

P10–P90: 4.7 — 26.5 mph

Recorded extremes

0.9 — 44.4 mph

Circular concentration: 22%

Mean Water Temperature

15.8°C

P10–P90: 15.2 — 17°C

Recorded extremes

14.8 — 18°C

Compared With Previous Septembers

Historical baseline from 7,786 observations across 12 years.

Wave Height: 3.9ft; 0.6ft above mean; Historical mean 3.314ft
Wave Period: 6.2s; 1.1s above mean; Historical mean 5.1s
Water Temperature: 15.8°C; 1.1°C above mean; Historical mean 14.7°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 2023Last observation shown Sep 2023
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)	2	1	1	1	2	2	2	2	2	1	2	4	3	3	3	QC rejected	4	4	7	8	3	5	4	9	7	6	8	8	4	4
Mean maximum wave height (ft)	3	2	2	1	3	3	3	3	3	2	3	7	6	5	6	9	6	5	12	13	6	8	7	14	11	11	12	13	6	6
Mean peak period (s)	5	4	5	5	4	7	8	9	9	5	4	5	5	6	5	6	5	4	7	9	9	5	5	8	7	7	7	9	5	8
Mean zero-crossing period (s)	4	4	4	4	3	4	4	5	5	4	3	4	4	4	4	5	4	4	5	6	5	4	4	6	5	5	5	6	4	5
Mean peak wave direction	ESEconcentration 79%	Econcentration 61%	Sconcentration 79%	SSEconcentration 56%	ENEconcentration 82%	SSEconcentration 55%	Sconcentration 93%	Sconcentration 99%	Sconcentration 99%	SSEconcentration 69%	SWconcentration 62%	NNEconcentration 98%	Econcentration 46%	Sconcentration 84%	NEconcentration 54%	NEconcentration 95%	ENEconcentration 86%	Wconcentration 66%	Sconcentration 94%	Sconcentration 99%	Sconcentration 95%	NWconcentration 92%	Variableconcentration 22%	Sconcentration 100%	Sconcentration 100%	Sconcentration 100%	SSEconcentration 98%	Sconcentration 99%	SWconcentration 90%	Sconcentration 98%
Mean wave direction	SEconcentration 97%	ESEconcentration 91%	Sconcentration 97%	SSEconcentration 73%	ENEconcentration 97%	ESEconcentration 51%	SSEconcentration 93%	Sconcentration 97%	Sconcentration 99%	Sconcentration 91%	SSWconcentration 76%	NNEconcentration 97%	ESEconcentration 55%	Sconcentration 96%	NEconcentration 52%	NEconcentration 96%	Econcentration 93%	Wconcentration 64%	Sconcentration 97%	Sconcentration 99%	SSWconcentration 96%	NWconcentration 88%	Variableconcentration 15%	Sconcentration 100%	Sconcentration 100%	Sconcentration 100%	SSEconcentration 97%	Sconcentration 99%	SWconcentration 94%	Sconcentration 98%
Mean directional spread (°)	203.7	201.0	180.2	203.8	157.2	153.8	75.8	61.4	72.4	152.8	179.4	146.9	188.7	151.8	166.2	132.1	177.9	196.2	114.6	105.2	103.1	173.2	169.5	95.1	97.9	108.6	129.7	114.5	186.3	122.0
Mean wind direction	SEconcentration 41%	Variableconcentration 11%	Sconcentration 65%	Econcentration 76%	NEconcentration 98%	SSEconcentration 87%	ENEconcentration 80%	SEconcentration 35%	SSWconcentration 85%	ESEconcentration 63%	NWconcentration 50%	Nconcentration 99%	SEconcentration 60%	SWconcentration 78%	NNEconcentration 94%	NNEconcentration 95%	Econcentration 97%	Wconcentration 82%	SSWconcentration 98%	SWconcentration 93%	Wconcentration 91%	NWconcentration 96%	SWconcentration 43%	Sconcentration 95%	SSWconcentration 98%	SSWconcentration 89%	SSEconcentration 76%	SWconcentration 90%	WSWconcentration 99%	Sconcentration 74%
Mean wind speed (mph)	5	5	7	8	12	9	7	5	6	9	10	20	17	11	18	22	14	20	25	25	12	23	19	27	24	21	26	23	17	16
Mean water temperature(°C)	15.4	15.3	15.5	15.5	15.3	15.6	15.9	16.7	17.3	17.2	17.2	16.5	16.1	16.3	15.9	15.3	15.3	15.5	15.5	15.6	15.7	15.6	15.6	15.9	15.8	15.6	15.6	15.8	15.6	15.5

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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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