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M2 wave buoy daily means for Jun 2018

Daily means from the M2 wave buoy for Jun 2018, 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

138 wave-buoy observations covered 10 of 30 days (33%). Typical wave height was 1.5 ft (10th–90th percentile 0.5–3.6 ft), while mean peak wave period was 5 seconds (10th–90th percentile 3.3–6.8 seconds). Typical wind was 7.5 mph (10th–90th percentile 2.8–14.3 mph). 49 of 612 checked values (8%) were excluded by quality control. Across 7 comparable years, mean wave height was below the same-month mean of 2.6 ft and mean wave period was below the same-month mean of 5.2 seconds.

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

Typical Significant Wave Height

1.5ft
Mean: 1.7 ft
P10–P90: 0.5 — 3.6 ft
Recorded extremes

0.5 — 4.1 ft

Available for 90 of 138 hourly samples

Mean Observed Wave Period

5secs
P10–P90: 3.3 — 6.8secs
Recorded extremes

2.5 — 9.1secs

Available for 89 of 138 hourly samples

Typical Observed Wind

Variable, 7.5mph
Mean: 8.2 mph
P10–P90: 2.8 — 14.3 mph
Recorded extremes

0.3 — 18.8 mph

Circular concentration: 20%

Available for 108 of 138 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 138 hourly samples

Compared With Previous Junes

Historical baseline from 4,987 observations across 7 years.

Wave Height
1.7ft
0.9ft below mean
Historical mean 2.625ft
Wave Period
5s
0.2s below mean
Historical mean 5.2s
Water Temperature
–
Not enough comparable data
Historical mean 11.7°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 Jun 2018Last observation shown
Metric
Mean significant wave height (ft)121-----------------3311------
Mean maximum wave height (ft)01000---------------43100-----
Mean peak period (s)645-----------------5557------
Mean zero-crossing period (s)534-----------------4444------
Mean peak wave directionENEconcentration 33%SSEconcentration 35%SSEconcentration 73%Nconcentration 100%Nconcentration 100%---------------Nconcentration 90%Nconcentration 98%NNEconcentration 93%Nconcentration 53%Nconcentration 100%-----
Mean wave directionEconcentration 34%SSEconcentration 47%Sconcentration 94%Nconcentration 100%Nconcentration 100%---------------Nconcentration 97%Nconcentration 98%NNEconcentration 96%Variableconcentration 18%Nconcentration 100%-----
Mean directional spread (°)16.920.236.20.00.0---------------27.919.818.914.90.0-----
Mean wind directionNEconcentration 59%Sconcentration 90%Sconcentration 83%Nconcentration 99%NEconcentration 84%---------------Nconcentration 84%Nconcentration 83%ENEconcentration 44%ESEconcentration 51%SSEconcentration 56%-----
Mean wind speed (mph)3126-14---------------61247------
Mean water temperature(°C)------------------------------

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