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M2 wave buoy daily means for Mar 2005

Daily means from the M2 wave buoy for Mar 2005, 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

685 wave-buoy observations covered all 31 days. Typical wave height was 3.6 ft (10th–90th percentile 2–6.9 ft), while mean zero-crossing wave period was 4.6 seconds (10th–90th percentile 4–6 seconds). Typical wind was 16.1 mph (10th–90th percentile 9.2–26.5 mph) and mean water temperature was 8.2°C (10th–90th percentile 8–8.5°C). All 3,297 checked values passed quality control.

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

Typical Significant Wave Height

3.6ft
Mean: 4 ft
P10–P90: 2 — 6.9 ft
Recorded extremes

1 — 9.5 ft

Available for 650 of 685 hourly samples

Mean Observed Wave Period

4.6secs
P10–P90: 4 — 6secs
Recorded extremes

3 — 7secs

Available for 657 of 685 hourly samples

Typical Observed Wind

Variable, 16.1mph
Mean: 17.2 mph
P10–P90: 9.2 — 26.5 mph
Recorded extremes

2.3 — 34.5 mph

Circular concentration: 3%

Available for 658 of 685 hourly samples

Mean Water Temperature

8.2°C
P10–P90: 8 — 8.5°C
Recorded extremes

7.8 — 8.7°C

Available for 665 of 685 hourly samples

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 Mar 2005Last observation shown
Metric
Mean significant wave height (ft)4645732332563477652346553232323
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)-------------------------------
Mean zero-crossing period (s)4544544444555566554445555545444
Mean peak wave direction-------------------------------
Mean wave direction-------------------------------
Mean directional spread (°)-------------------------------
Mean wind directionNWconcentration 74%NNEconcentration 93%NNWconcentration 74%NWconcentration 83%Nconcentration 93%Variableconcentration 11%NNWconcentration 96%NNWconcentration 96%NNWconcentration 93%WNWconcentration 89%Wconcentration 97%NWconcentration 100%WNWconcentration 89%SSWconcentration 97%SSWconcentration 99%SSWconcentration 99%SSWconcentration 97%SSWconcentration 97%ESEconcentration 76%Econcentration 96%SEconcentration 93%SSEconcentration 96%SSEconcentration 90%SSEconcentration 96%SSEconcentration 78%NEconcentration 94%NEconcentration 96%Econcentration 96%Econcentration 96%NEconcentration 80%SEconcentration 70%
Mean wind speed (mph)202318252791414141326231621282720171291624202010121310131113
Mean water temperature(°C)8.38.38.38.38.18.28.28.28.28.28.18.18.18.08.08.18.18.08.28.38.48.18.18.28.48.48.48.58.48.58.5

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