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M2 wave buoy daily means for Apr 2002

Daily means from the M2 wave buoy for Apr 2002, 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

720 wave-buoy observations covered all 30 days. Typical wave height was 3.6 ft (10th–90th percentile 1.6–7.2 ft), while mean zero-crossing wave period was 4.8 seconds (10th–90th percentile 4–6 seconds). Typical wind was 15 mph (10th–90th percentile 5.8–25.3 mph) and mean water temperature was 8.7°C (10th–90th percentile 8.5–9°C). All 3,588 checked values passed quality control.

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

Typical Significant Wave Height

3.6ft
Mean: 4.1 ft
P10–P90: 1.6 — 7.2 ft
Recorded extremes

1 — 10.5 ft

Available for 719 of 720 hourly samples

Mean Observed Wave Period

4.8secs
P10–P90: 4 — 6secs
Recorded extremes

4 — 7secs

Available for 718 of 720 hourly samples

Typical Observed Wind

Variable, 15mph
Mean: 15.1 mph
P10–P90: 5.8 — 25.3 mph
Recorded extremes

2.3 — 32.2 mph

Circular concentration: 23%

Available for 717 of 720 hourly samples

Mean Water Temperature

8.7°C
P10–P90: 8.5 — 9°C
Recorded extremes

8.5 — 9.4°C

Available for 715 of 720 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 Apr 2002Last observation shown
Metric
Mean significant wave height (ft)443258522324222455268534365675
Mean maximum wave height (ft)------------------------------
Mean peak period (s)------------------------------
Mean zero-crossing period (s)555456544445444555456555465555
Mean peak wave direction------------------------------
Mean wave direction------------------------------
Mean directional spread (°)------------------------------
Mean wind directionSSWconcentration 92%SSEconcentration 89%Sconcentration 96%Nconcentration 68%Econcentration 98%Econcentration 98%ENEconcentration 90%Nconcentration 93%NNEconcentration 95%ENEconcentration 91%ENEconcentration 70%Nconcentration 96%Sconcentration 36%NWconcentration 40%SSEconcentration 75%Sconcentration 98%SSEconcentration 85%WNWconcentration 92%SWconcentration 46%Sconcentration 98%Sconcentration 100%SSWconcentration 89%SSWconcentration 86%Sconcentration 97%SWconcentration 75%WSWconcentration 73%SWconcentration 77%WSWconcentration 97%Wconcentration 97%SSWconcentration 77%
Mean wind speed (mph)141598192317791171679818181892326151016142319222417
Mean water temperature(°C)8.58.68.68.68.68.68.68.78.78.68.78.68.78.78.78.78.78.78.88.88.78.89.09.09.18.98.98.98.99.0

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