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M2 wave buoy daily means for Oct 2011

Daily means from the M2 wave buoy for Oct 2011, including available wave height, period, direction, wind and sea temperature data.

Last observation shown

Data available:  to 

Monthly means for

Latest

Period Summary

Programmatically generated summary. Hog Says

745 wave-buoy observations covered all 31 days. Typical wave height was 4.4 ft (10th–90th percentile 2.1–8.2 ft), while mean peak wave period was 5.8 seconds (10th–90th percentile 3.9–8 seconds). Mean water temperature was 14°C (10th–90th percentile 13.7–14.3°C). 2 of 2,980 checked values (0.1%) were excluded by quality control. Across 1 comparable year, mean wave height was above the same-month mean of 4.5 ft and mean wave period was above the same-month mean of 4.9 seconds.

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

Typical Significant Wave Height

4.4ft
Mean: 4.7 ft
P10–P90: 2.1 — 8.2 ft
Recorded extremes

0.8 — 12 ft

Mean Observed Wave Period

5.8secs
P10–P90: 3.9 — 8secs
Recorded extremes

2.6 — 13.7secs

Available for 743 of 745 hourly samples

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Available for 0 of 745 hourly samples

Mean Water Temperature

14°C
P10–P90: 13.7 — 14.3°C
Recorded extremes

13.6 — 14.5°C

Compared With Previous Octobers

Historical baseline from 698 observations across 1 year.

Wave Height
4.7ft
0.2ft above mean
Historical mean 4.462ft
Wave Period
5.8s
0.9s above mean
Historical mean 4.9s
Water Temperature
14°C
0.6°C above mean
Historical mean 13.4°C

Chart showing grouped wave observations for M2. Use the table on this page for a text version of the same measurements. To open hourly observations, use a linked day name in the table.

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.

Metrics are rows; days run left to right.
M2 wave buoy daily means Oct 2011Last observation shown
Metric
Mean significant wave height (ft)2244775345421243874379694334856
Mean maximum wave height (ft)33659118458631364111064101491465461279
Mean peak period (s)8555765456655454765468796566867
Mean zero-crossing period (s)5444554445444444554456565444655
Mean peak wave directionSconcentration 74%Sconcentration 95%Sconcentration 92%SWconcentration 83%Sconcentration 99%Wconcentration 94%NWconcentration 99%Wconcentration 91%SWconcentration 88%SSWconcentration 90%SSWconcentration 87%SSWconcentration 79%SSEconcentration 86%Sconcentration 89%Sconcentration 100%SSWconcentration 81%Sconcentration 94%Wconcentration 95%NWconcentration 98%Wconcentration 71%Sconcentration 99%Sconcentration 100%Sconcentration 99%SSEconcentration 86%SEconcentration 65%Sconcentration 98%Sconcentration 80%SSWconcentration 84%Sconcentration 99%Sconcentration 99%Sconcentration 99%
Mean wave directionSSEconcentration 63%SSEconcentration 90%SSWconcentration 96%SSWconcentration 96%SSWconcentration 98%WSWconcentration 96%NWconcentration 99%Wconcentration 88%SWconcentration 96%SSWconcentration 98%SSWconcentration 98%SSWconcentration 96%SSEconcentration 91%Sconcentration 98%Sconcentration 100%SSWconcentration 97%SSWconcentration 98%Wconcentration 95%NWconcentration 97%Wconcentration 68%SSWconcentration 100%Sconcentration 100%Sconcentration 99%SSEconcentration 95%SSEconcentration 78%Sconcentration 100%Sconcentration 77%SWconcentration 84%Sconcentration 100%Sconcentration 100%Sconcentration 100%
Mean directional spread (°)28.427.121.626.917.727.325.729.727.125.226.134.732.027.322.930.322.128.226.126.116.617.121.429.733.125.232.426.323.422.521.9
Mean wind direction-------------------------------
Mean wind speed (mph)-------------------------------
Mean water temperature(°C)14.314.314.314.414.314.013.913.813.913.913.914.013.913.914.014.013.913.813.713.713.713.613.613.814.014.114.114.014.014.014.0

Swipe sideways to see more days.

Wave metric colour key

Colours move through the scale as each number increases. They do not by themselves mean that conditions are good, safe or suitable for you.

Wave & swell height0–40+ ft
Wave & swell period0–22+ s
Wind speed0–75 mph

The displayed numbers remain the source of truth; colour is an additional visual cue.

What does buoy wave power mean?

kW/m means kilowatts of wave power per metre of wave crest. It describes the rate at which the observed sea state carries energy past the buoy.

Unlike the shore-directed forecast value, buoy wave power is the total power at the observation point. It is not projected towards a particular beach and does not predict breaking wave height.

In deep water, wave power can be calculated with:

P is approximately 0.49 times significant wave height squared times wave energy period.

P is power in kW/m, Hs is significant wave height in metres, and Te is wave energy period in seconds.

  • Provider-reported power is used when available.
  • Otherwise, a value is calculated only when both significant height and a genuine energy period are available. The ≈ symbol marks calculated values.
  • A dash is shown instead of substituting peak, Tm02, zero-crossing or other period measurements.
  • Daily and monthly figures use the mean of hourly-normalized observation power values; they are not calculated from mean height and period.

Wave direction, spectrum, water depth and local bathymetry still matter. Wave power is best read alongside height, period and direction rather than as a standalone surf-quality score.

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