M2 wave buoy daily means for Sep 2020

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

Last observation shown Wed, Sep 30, 2020, 23:00

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

Monthly means for 2020

Period Summary

Hog Says

718 wave-buoy observations covered all 30 days. Typical wave height was 3.1 ft (10th–90th percentile 1.2–5.9 ft), while mean peak wave period was 5 seconds (10th–90th percentile 3.4–6.6 seconds). Typical wind was 15.1 mph (10th–90th percentile 5.4–22.8 mph) and mean water temperature was 14.7°C (10th–90th percentile 14.3–15°C). All 2,865 checked values passed quality control. Across 9 comparable years, mean wave height was below the same-month mean of 3.4 ft and mean wave period was below 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: 3.3 ft

P10–P90: 1.2 — 5.9 ft

Recorded extremes

0.4 — 11.9 ft

Available for 238 of 718 hourly samples

Mean Observed Wave Period

5secs

P10–P90: 3.4 — 6.6secs

Recorded extremes

2.2 — 9.7secs

Available for 238 of 718 hourly samples

Typical Observed Wind

Variable, 15.1mph

Mean: 14.9 mph

P10–P90: 5.4 — 22.8 mph

Recorded extremes

0.8 — 37.7 mph

Circular concentration: 28%

Available for 717 of 718 hourly samples

Mean Water Temperature

14.7°C

P10–P90: 14.3 — 15°C

Recorded extremes

14.2 — 16.2°C

Available for 717 of 718 hourly samples

Compared With Previous Septembers

Historical baseline from 5,638 observations across 9 years.

Wave Height: 3.3ft; 0.1ft below mean; Historical mean 3.445ft
Wave Period: 5s; 0.1s below mean; Historical mean 5.1s
Water Temperature: 14.7°C; 0.2°C above mean; Historical mean 14.5°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 Sep 2020Last observation shown Sep 2020
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	QC rejected	3	3	3	2	2	3	3	2	4	4	6	2	1	2	3	4	6	4	1	3	3	3	6	5	2	2	2	7
Mean maximum wave height (ft)	4	9	5	4	4	3	3	4	4	2	6	6	8	3	0	2	5	5	9	6	1	4	4	5	9	7	3	2	2	10
Mean peak period (s)	4	6	6	4	4	4	5	5	5	4	5	5	6	4	5	5	5	5	6	5	4	6	4	5	6	6	4	4	3	7
Mean zero-crossing period (s)	4	5	4	4	4	4	4	4	4	3	4	4	5	4	4	4	4	4	5	4	3	4	4	4	5	4	3	3	3	5
Mean peak wave direction	Sconcentration 98%	Sconcentration 100%	Sconcentration 80%	SWconcentration 86%	WNWconcentration 99%	WSWconcentration 55%	Sconcentration 89%	Sconcentration 98%	WNWconcentration 62%	WNWconcentration 56%	Sconcentration 97%	SSWconcentration 89%	Sconcentration 100%	Sconcentration 99%	Sconcentration 82%	Variableconcentration 23%	ENEconcentration 98%	ENEconcentration 98%	ENEconcentration 99%	ENEconcentration 99%	NEconcentration 53%	SSEconcentration 86%	Nconcentration 67%	SSEconcentration 56%	Nconcentration 97%	Nconcentration 99%	Nconcentration 69%	Sconcentration 74%	WSWconcentration 46%	Sconcentration 75%
Mean wave direction	Sconcentration 99%	Sconcentration 100%	SSWconcentration 96%	SWconcentration 97%	Wconcentration 99%	SWconcentration 70%	SSWconcentration 96%	Sconcentration 98%	WNWconcentration 63%	NWconcentration 54%	SSWconcentration 99%	SSWconcentration 94%	Sconcentration 100%	Sconcentration 99%	SSEconcentration 95%	Econcentration 46%	ENEconcentration 98%	ENEconcentration 99%	ENEconcentration 99%	ENEconcentration 99%	NNEconcentration 40%	SSEconcentration 90%	Nconcentration 61%	SEconcentration 65%	Nconcentration 97%	Nconcentration 99%	Nconcentration 69%	SSWconcentration 82%	Wconcentration 49%	SSWconcentration 75%
Mean directional spread (°)	26.3	20.4	27.4	35.7	29.9	33.9	23.6	23.2	27.4	34.2	19.5	24.3	17.9	27.2	42.2	35.2	25.7	24.4	19.9	24.4	31.6	28.7	29.4	30.9	25.7	21.1	35.5	35.0	33.0	20.6
Mean wind direction	Sconcentration 99%	Sconcentration 99%	WSWconcentration 96%	WSWconcentration 95%	Wconcentration 98%	Wconcentration 87%	SWconcentration 93%	SSWconcentration 94%	WNWconcentration 83%	Wconcentration 81%	SWconcentration 92%	SWconcentration 90%	SSWconcentration 98%	SSEconcentration 68%	Sconcentration 61%	NEconcentration 73%	Econcentration 85%	ENEconcentration 97%	ENEconcentration 96%	ENEconcentration 99%	SWconcentration 64%	SSWconcentration 90%	NNWconcentration 74%	Variableconcentration 26%	NNWconcentration 96%	Nconcentration 99%	WNWconcentration 71%	SWconcentration 58%	WSWconcentration 52%	SWconcentration 50%
Mean wind speed (mph)	17	26	15	17	17	11	13	13	13	12	19	20	21	10	6	9	9	17	21	16	5	14	12	14	23	19	11	11	13	21
Mean water temperature(°C)	14.9	14.8	14.9	14.8	14.8	14.9	14.9	15.0	15.0	14.9	14.8	14.7	14.6	14.7	15.2	15.2	14.8	14.4	14.3	14.4	14.5	14.5	14.4	14.3	14.3	14.3	14.5	14.6	14.5	14.5

Swipe sideways to see more days.

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.

› Wave Buoy List