M2 wave buoy daily means for Dec 2017

Daily means from the M2 wave buoy for Dec 2017, including available wave height, period, direction, wind and sea temperature data.

Last observation shown Sun, Dec 31, 2017, 23:00

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

Monthly means for 2017

Period Summary

Hog Says

710 wave-buoy observations covered all 31 days. Typical wave height was 4.1 ft (10th–90th percentile 2.1–7.7 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 3.8–6.9 seconds). Typical wind was 19.7 mph (10th–90th percentile 10.8–29.2 mph) and mean water temperature was 11.3°C (10th–90th percentile 10.7–11.9°C). 3 of 3,549 checked values (0.1%) were excluded by quality control. Across 7 comparable years, mean wave height was below the same-month mean of 6 ft and mean wave period was below the same-month mean of 6.3 seconds.

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

Typical Significant Wave Height

4.1ft

Mean: 4.6 ft

P10–P90: 2.1 — 7.7 ft

Recorded extremes

1.5 — 11.8 ft

Available for 709 of 710 hourly samples

Mean Observed Wave Period

5.3secs

P10–P90: 3.8 — 6.9secs

Recorded extremes

2.5 — 11.6secs

Available for 707 of 710 hourly samples

Typical Observed Wind

-, 19.7mph

Mean: 19.8 mph

P10–P90: 10.8 — 29.2 mph

Recorded extremes

0.3 — 37.5 mph

Mean Water Temperature

11.3°C

P10–P90: 10.7 — 11.9°C

Recorded extremes

10.3 — 12.6°C

Compared With Previous Decembers

Historical baseline from 4,223 observations across 7 years.

Wave Height: 4.6ft; 1.4ft below mean; Historical mean 6.004ft
Wave Period: 5.3s; 1s below mean; Historical mean 6.3s
Water Temperature: 11.3°C; 0.3°C below mean; Historical mean 11.6°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 Dec 2017Last observation shown Dec 2017
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)	5	4	4	3	2	8	7	7	4	4	4	4	6	7	7	4	3	3	3	3	2	2	2	6	7	5	7	3	6	5	7
Mean maximum wave height (ft)	8	5	5	4	3	11	11	10	5	6	6	6	9	10	11	5	4	4	5	4	3	2	3	9	10	7	10	5	9	7	11
Mean peak period (s)	6	4	4	4	4	7	7	6	4	5	5	5	5	6	6	5	4	5	5	5	5	5	4	6	8	6	6	4	5	6	7
Mean zero-crossing period (s)	5	4	4	4	3	5	5	5	4	4	4	4	4	5	5	4	4	4	4	4	4	4	3	5	5	4	5	4	5	5	5
Mean peak wave direction	Variableconcentration 17%	NEconcentration 34%	Variableconcentration 26%	Variableconcentration 27%	Variableconcentration 19%	NNWconcentration 35%	NNEconcentration 36%	NEconcentration 61%	Variableconcentration 14%	NEconcentration 46%	Variableconcentration 29%	NNWconcentration 32%	NNEconcentration 59%	Nconcentration 48%	NNEconcentration 44%	Variableconcentration 21%	NNWconcentration 50%	NNEconcentration 33%	Variableconcentration 18%	Variableconcentration 8%	Variableconcentration 17%	Variableconcentration 12%	Nconcentration 34%	NWconcentration 39%	NWconcentration 37%	NNEconcentration 47%	NNEconcentration 46%	Variableconcentration 17%	NNEconcentration 61%	NNEconcentration 46%	Variableconcentration 29%
Mean wave direction	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean directional spread (°)	30.0	31.1	31.8	31.9	33.6	24.4	29.4	25.9	35.2	33.8	29.9	31.1	28.4	31.6	28.5	31.7	28.5	34.8	23.7	31.1	32.2	36.1	29.2	20.5	23.0	26.4	30.4	36.2	27.8	29.4	26.0
Mean wind direction	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean wind speed (mph)	19	19	18	17	15	28	27	27	15	19	19	19	26	28	26	19	18	13	16	9	12	8	15	23	21	20	26	15	25	21	27
Mean water temperature(°C)	12.2	11.9	11.9	11.8	11.8	11.8	11.8	11.4	11.3	11.3	11.1	11.3	11.6	11.5	11.3	11.2	11.4	11.4	11.3	11.2	11.2	11.2	11.2	10.9	10.8	10.8	10.7	10.5	10.9	11.0	10.9

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