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M2 wave buoy daily means for Feb 2012

Daily means from the M2 wave buoy for Feb 2012, 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

695 wave-buoy observations covered all 29 days. Typical wave height was 2.6 ft (10th–90th percentile 2.1–3.1 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 3.4–7.1 seconds). Typical wind was 15.6 mph (10th–90th percentile 7.4–23.1 mph) and mean water temperature was 8.7°C (10th–90th percentile 8.5–9.3°C). 2 of 3,486 checked values (0.1%) were excluded by quality control. Across 2 comparable years, mean wave height was below the same-month mean of 3.4 ft and mean wave period was above the same-month mean of 4.4 seconds.

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

Typical Significant Wave Height

2.6ft
Mean: 2.6 ft
P10–P90: 2.1 — 3.1 ft
Recorded extremes

2.1 — 3.1 ft

Available for 11 of 695 hourly samples

Mean Observed Wave Period

5.3secs
P10–P90: 3.4 — 7.1secs
Recorded extremes

2.5 — 16.1secs

Available for 693 of 695 hourly samples

Typical Observed Wind

WSW, 15.6mph
Mean: 15.5 mph
P10–P90: 7.4 — 23.1 mph
Recorded extremes

0.5 — 32.4 mph

Circular concentration: 55%

Mean Water Temperature

8.7°C
P10–P90: 8.5 — 9.3°C
Recorded extremes

8.5 — 9.4°C

Compared With Previous Februarys

Historical baseline from 798 observations across 2 years.

Wave Height
2.6ft
0.8ft below mean
Historical mean 3.412ft
Wave Period
5.3s
0.9s above mean
Historical mean 4.4s
Water Temperature
8.7°C
0.7°C above mean
Historical mean 8°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 Feb 2012Last observation shown
Metric
Mean significant wave height (ft)3----------------------------
Mean maximum wave height (ft)4----------------------------
Mean peak period (s)65464746556456644645687586454
Mean zero-crossing period (s)4----------------------------
Mean peak wave directionEconcentration 97%ESEconcentration 82%Sconcentration 94%Sconcentration 87%Wconcentration 88%Sconcentration 83%SEconcentration 75%Sconcentration 97%Sconcentration 92%SSEconcentration 77%Sconcentration 99%WSWconcentration 41%NWconcentration 92%NNWconcentration 97%NNWconcentration 93%Wconcentration 87%SSWconcentration 77%WSWconcentration 54%WNWconcentration 90%Sconcentration 95%Sconcentration 97%Sconcentration 96%Sconcentration 87%SSWconcentration 59%Variableconcentration 18%Sconcentration 68%Sconcentration 91%SWconcentration 62%Sconcentration 93%
Mean wave directionEconcentration 98%SEconcentration 88%Sconcentration 97%SSWconcentration 93%Wconcentration 96%SSEconcentration 92%SEconcentration 84%Sconcentration 96%Sconcentration 93%SEconcentration 87%SSWconcentration 100%SWconcentration 56%NWconcentration 94%NNWconcentration 97%NNWconcentration 96%Wconcentration 87%SSWconcentration 93%WSWconcentration 72%WNWconcentration 92%SSWconcentration 97%Sconcentration 98%Sconcentration 96%Sconcentration 97%SSWconcentration 83%SWconcentration 32%Sconcentration 89%Sconcentration 97%SSWconcentration 85%Sconcentration 97%
Mean directional spread (°)23.136.025.019.529.740.431.325.324.237.823.533.923.725.325.425.233.823.534.722.722.324.235.340.147.141.828.841.625.4
Mean wind directionESEconcentration 97%SSEconcentration 93%SSWconcentration 92%SWconcentration 60%WNWconcentration 97%Nconcentration 35%SSEconcentration 90%Sconcentration 97%SSWconcentration 98%Sconcentration 50%SSWconcentration 98%WNWconcentration 85%NWconcentration 95%NWconcentration 96%NWconcentration 98%Wconcentration 98%WSWconcentration 95%Wconcentration 82%WNWconcentration 88%SWconcentration 98%SSWconcentration 98%SWconcentration 88%SWconcentration 97%WNWconcentration 75%Wconcentration 83%SWconcentration 92%SWconcentration 96%SWconcentration 81%SSWconcentration 96%
Mean wind speed (mph)1610162114813211413211120211816122316212023131291313715
Mean water temperature(°C)9.49.49.39.28.98.98.98.88.88.78.78.78.78.68.68.68.68.68.68.58.58.68.68.68.68.68.68.68.6

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.

Observation data source

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

› Wave Buoy List