M2 wave buoy daily means for Jul 2021

Daily means from the M2 wave buoy for Jul 2021, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sat, Jul 31, 2021, 23:00

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

Monthly means for 2021

Period Summary

Hog Says

740 wave-buoy observations covered all 31 days. Typical wave height was 1.5 ft (10th–90th percentile 0.5–2.6 ft), while mean peak wave period was 4.9 seconds (10th–90th percentile 2.9–7.4 seconds). Typical wind was 8.7 mph (10th–90th percentile 2.5–15.7 mph) and mean water temperature was 15.5°C (10th–90th percentile 14.1–17.3°C). 5 of 4,440 checked values (0.1%) were excluded by quality control. Across 9 comparable years, mean wave height was below the same-month mean of 2.5 ft and mean wave period was above the same-month mean of 4.8 seconds.

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

Typical Significant Wave Height

1.5ft

Mean: 1.5 ft

P10–P90: 0.5 — 2.6 ft

Recorded extremes

0.5 — 5.6 ft

Mean Observed Wave Period

4.9secs

P10–P90: 2.9 — 7.4secs

Recorded extremes

2.1 — 13.5secs

Available for 735 of 740 hourly samples

Typical Observed Wind

Variable, 8.7mph

Mean: 8.9 mph

P10–P90: 2.5 — 15.7 mph

Recorded extremes

0.2 — 26.2 mph

Circular concentration: 1%

Mean Water Temperature

15.5°C

P10–P90: 14.1 — 17.3°C

Recorded extremes

12.6 — 19.3°C

Compared With Previous Julys

Historical baseline from 6,119 observations across 9 years.

Wave Height: 1.5ft; 1ft below mean; Historical mean 2.493ft
Wave Period: 4.9s; 0.1s above mean; Historical mean 4.8s
Water Temperature: 15.5°C; 1.8°C above mean; Historical mean 13.7°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 Jul 2021Last observation shown Jul 2021
Metric	Jul 1	Jul 2	Jul 3	Jul 4	Jul 5	Jul 6	Jul 7	Jul 8	Jul 9	Jul 10	Jul 11	Jul 12	Jul 13	Jul 14	Jul 15	Jul 16	Jul 17	Jul 18	Jul 19	Jul 20	Jul 21	Jul 22	Jul 23	Jul 24	Jul 25	Jul 26	Jul 27	Jul 28	Jul 29	Jul 30	Jul 31
Mean significant wave height (ft)	1	1	2	3	3	2	2	1	2	1	2	2	2	1	2	1	1	1	1	1	1	1	1	2	1	1	1	3	4	2	2
Mean maximum wave height (ft)	0	1	2	4	3	3	3	2	2	1	2	2	2	1	2	0	0	1	1	0	0	0	1	3	0	1	0	4	6	3	3
Mean peak period (s)	5	4	4	6	4	9	8	6	4	6	4	5	4	5	4	5	7	4	3	4	5	6	6	4	5	4	5	4	5	4	5
Mean zero-crossing period (s)	3	3	3	4	4	4	4	4	3	4	3	4	4	3	3	3	4	3	3	3	3	4	4	3	3	3	3	4	4	3	4
Mean peak wave direction	ENEconcentration 40%	SSEconcentration 72%	Sconcentration 71%	Sconcentration 98%	SSWconcentration 84%	Sconcentration 87%	Sconcentration 93%	Sconcentration 64%	Sconcentration 97%	Sconcentration 90%	Sconcentration 96%	Variableconcentration 16%	NNEconcentration 89%	SEconcentration 32%	Nconcentration 65%	NEconcentration 52%	ENEconcentration 33%	NNEconcentration 73%	NNEconcentration 98%	NEconcentration 75%	ENEconcentration 60%	Econcentration 50%	ESEconcentration 35%	ENEconcentration 94%	Econcentration 62%	Variableconcentration 19%	Variableconcentration 11%	Wconcentration 90%	Wconcentration 66%	Variableconcentration 30%	Wconcentration 46%
Mean wave direction	NEconcentration 80%	SSEconcentration 95%	Sconcentration 98%	Sconcentration 100%	SSWconcentration 95%	Sconcentration 93%	SSWconcentration 92%	Sconcentration 72%	Sconcentration 98%	Sconcentration 93%	Sconcentration 99%	Variableconcentration 29%	NNEconcentration 73%	SEconcentration 34%	Nconcentration 62%	ENEconcentration 72%	ESEconcentration 64%	NNEconcentration 71%	NNEconcentration 99%	NEconcentration 84%	NEconcentration 74%	ESEconcentration 66%	Econcentration 67%	ENEconcentration 96%	Econcentration 79%	Variableconcentration 20%	SWconcentration 33%	Wconcentration 91%	WSWconcentration 80%	NEconcentration 41%	Wconcentration 52%
Mean directional spread (°)	35.7	30.5	24.4	24.6	26.2	25.0	24.8	34.1	29.2	30.6	30.3	32.9	37.7	36.9	28.4	42.8	40.5	27.1	28.8	31.5	32.6	32.5	27.6	29.5	36.6	34.3	36.0	26.5	35.4	32.9	31.9
Mean wind direction	SWconcentration 41%	SSEconcentration 68%	SEconcentration 87%	Sconcentration 95%	SSWconcentration 83%	SWconcentration 69%	Wconcentration 48%	WSWconcentration 36%	Sconcentration 99%	ESEconcentration 65%	SSEconcentration 93%	Nconcentration 77%	NWconcentration 47%	WSWconcentration 65%	NNWconcentration 45%	NWconcentration 49%	Variableconcentration 14%	NEconcentration 95%	NEconcentration 97%	NEconcentration 80%	NEconcentration 66%	NEconcentration 83%	NEconcentration 91%	NEconcentration 93%	Variableconcentration 11%	WSWconcentration 31%	Variableconcentration 13%	Wconcentration 96%	WSWconcentration 76%	Nconcentration 70%	Wconcentration 69%
Mean wind speed (mph)	4	8	13	14	15	9	10	7	13	6	14	8	6	7	9	4	3	7	7	8	3	5	10	11	4	6	9	17	16	10	12
Mean water temperature(°C)	13.4	14.2	14.4	14.7	14.7	15.1	15.3	15.5	15.3	15.8	15.3	15.4	15.9	15.7	15.3	15.8	17.0	16.2	16.6	17.3	17.5	16.9	15.0	14.2	14.6	15.1	15.6	15.7	15.7	15.4	15.9

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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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