M2 wave buoy daily means for Dec 2025

Daily means from the M2 wave buoy for Dec 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Wed, Dec 31, 2025, 23:00

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

Monthly means for 2025

Period Summary

Hog Says

744 wave-buoy observations covered all 31 days. Typical wave height was 5.8 ft (10th–90th percentile 2.8–10 ft), while mean peak wave period was 7.1 seconds (10th–90th percentile 4.2–10.5 seconds). Typical wind was 23.6 mph (10th–90th percentile 12.4–34.7 mph) and mean water temperature was 12.3°C (10th–90th percentile 11.6–12.9°C). 6 of 4,464 checked values (0.1%) were excluded by quality control. Across 15 comparable years, mean wave height was above the same-month mean of 5.6 ft and mean wave period was above the same-month mean of 6.1 seconds.

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

Typical Significant Wave Height

5.8ft

Mean: 6.1 ft

P10–P90: 2.8 — 10 ft

Recorded extremes

1.2 — 20.4 ft

Mean Observed Wave Period

7.1secs

P10–P90: 4.2 — 10.5secs

Recorded extremes

2.8 — 20secs

Available for 738 of 744 hourly samples

Typical Observed Wind

S, 23.6mph

Mean: 23.5 mph

P10–P90: 12.4 — 34.7 mph

Recorded extremes

1.7 — 55.2 mph

Circular concentration: 38%

Mean Water Temperature

12.3°C

P10–P90: 11.6 — 12.9°C

Recorded extremes

11.4 — 13°C

Compared With Previous Decembers

Historical baseline from 9,697 observations across 15 years.

Wave Height: 6.1ft; 0.5ft above mean; Historical mean 5.577ft
Wave Period: 7.1s; 1s above mean; Historical mean 6.1s
Water Temperature: 12.3°C; 0.6°C above mean; Historical mean 11.7°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 Dec 2025Last observation shown Dec 2025
Metric	Dec 1	Dec 2	Dec 3	Dec 4	Dec 5	Dec 6	Dec 7	Dec 8	Dec 9	Dec 10	Dec 11	Dec 12	Dec 13	Dec 14	Dec 15	Dec 16	Dec 17	Dec 18	Dec 19	Dec 20	Dec 21	Dec 22	Dec 23	Dec 24	Dec 25	Dec 26	Dec 27	Dec 28	Dec 29	Dec 30	Dec 31
Mean significant wave height (ft)	7	5	4	5	8	6	4	6	12	8	9	4	7	12	5	2	9	6	7	8	6	4	5	7	8	7	6	5	3	3	3
Mean maximum wave height (ft)	12	7	6	8	13	10	7	10	19	13	16	7	12	20	7	4	15	10	10	13	10	7	7	11	12	12	11	8	5	5	4
Mean peak period (s)	9	8	5	5	7	10	6	8	10	11	8	11	6	9	9	5	8	8	8	8	7	5	6	6	7	7	6	6	4	4	4
Mean zero-crossing period (s)	6	5	4	4	5	5	4	5	6	6	6	5	5	6	5	4	6	5	5	5	5	4	4	5	5	5	5	4	4	4	3
Mean peak wave direction	SSWconcentration 96%	SSWconcentration 98%	Sconcentration 98%	WSWconcentration 60%	Sconcentration 92%	SSWconcentration 90%	SSWconcentration 58%	Sconcentration 96%	Sconcentration 91%	SSWconcentration 98%	Sconcentration 99%	Sconcentration 97%	SSWconcentration 99%	SSWconcentration 99%	SSWconcentration 100%	WSWconcentration 67%	Sconcentration 99%	SSWconcentration 87%	SSWconcentration 96%	SSEconcentration 97%	Econcentration 73%	NEconcentration 94%	NEconcentration 94%	NEconcentration 97%	NEconcentration 96%	NEconcentration 96%	ENEconcentration 97%	NEconcentration 97%	NEconcentration 97%	NEconcentration 95%	Nconcentration 56%
Mean wave direction	SSWconcentration 91%	SSWconcentration 98%	SSWconcentration 98%	SWconcentration 75%	Sconcentration 90%	SSWconcentration 97%	SSWconcentration 63%	Sconcentration 97%	Sconcentration 89%	SSWconcentration 97%	Sconcentration 99%	SSWconcentration 96%	SSWconcentration 100%	SSWconcentration 100%	SSWconcentration 98%	WSWconcentration 90%	Sconcentration 99%	SSWconcentration 91%	SWconcentration 98%	SSEconcentration 94%	ESEconcentration 85%	NEconcentration 97%	NEconcentration 96%	NEconcentration 98%	NEconcentration 90%	NEconcentration 97%	NEconcentration 98%	NEconcentration 98%	NEconcentration 99%	NEconcentration 98%	Nconcentration 69%
Mean directional spread (°)	101.1	161.0	165.8	159.7	155.5	165.5	178.6	149.4	147.2	166.9	129.5	155.1	153.6	147.7	90.4	123.0	141.7	153.6	156.0	131.2	160.9	168.9	148.9	115.9	123.7	118.9	101.2	144.3	176.7	197.1	182.6
Mean wind direction	SSWconcentration 65%	SSWconcentration 98%	SSWconcentration 97%	WSWconcentration 74%	Sconcentration 90%	WSWconcentration 96%	SSWconcentration 70%	SSWconcentration 97%	Sconcentration 89%	SWconcentration 95%	SSWconcentration 61%	SWconcentration 86%	SSWconcentration 99%	SSWconcentration 96%	WNWconcentration 95%	Wconcentration 80%	SSWconcentration 98%	SSWconcentration 89%	SWconcentration 97%	SSEconcentration 91%	ESEconcentration 88%	Econcentration 97%	ENEconcentration 96%	ENEconcentration 98%	ENEconcentration 99%	ENEconcentration 98%	ENEconcentration 99%	Econcentration 98%	ENEconcentration 98%	Econcentration 99%	WNWconcentration 60%
Mean wind speed (mph)	20	19	21	21	29	23	21	24	36	28	30	15	30	37	9	14	32	24	25	30	21	19	21	27	29	27	27	21	17	15	15
Mean water temperature(°C)	12.9	12.9	12.9	12.9	12.9	12.9	12.8	12.8	12.7	12.6	12.5	12.5	12.5	12.5	12.5	12.4	12.4	12.3	12.2	12.2	12.1	12.1	12.1	12.0	11.9	11.8	11.6	11.5	11.5	11.5	11.5

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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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