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M2 wave buoy daily means for Aug 2018

Daily means from the M2 wave buoy for Aug 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

86 wave-buoy observations covered 5 of 31 days (16%). Mean peak wave period was 23.9 seconds (10th–90th percentile 21.3–25 seconds); wave-height data were unavailable. 3 of 258 checked values (1.2%) were excluded by quality control.

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

Typical Significant Wave Height

-ft
Mean: - ft
P10–P90: - — - ft

Available for 0 of 86 hourly samples

Mean Observed Wave Period

23.9secs
P10–P90: 21.3 — 25secs
Recorded extremes

17.7 — 25secs

Available for 83 of 86 hourly samples

Typical Observed Wind

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

Circular concentration: 82%

Available for 0 of 86 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 86 hourly samples

Compared With Previous Augusts

Historical baseline from 4,359 observations across 7 years.

Wave Height
–
Not enough comparable data
Historical mean 2.69ft
Wave Period
23.9s
18.7s above mean
Historical mean 5.2s
Water Temperature
–
Not enough comparable data
Historical mean 14.3°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 Aug 2018Last observation shown
Metric
Mean significant wave height (ft)-------------------------------
Mean maximum wave height (ft)-----------------------00000---
Mean peak period (s)-----------------------2424242423---
Mean zero-crossing period (s)-------------------------------
Mean peak wave direction-----------------------Variableconcentration 28%NNWconcentration 52%Variableconcentration 13%Variableconcentration 15%NWconcentration 34%---
Mean wave direction-----------------------Variableconcentration 18%NNWconcentration 39%Variableconcentration 24%WSWconcentration 31%Variableconcentration 28%---
Mean directional spread (°)-----------------------67.167.372.972.072.6---
Mean wind direction-----------------------Wconcentration 89%WSWconcentration 68%SWconcentration 86%WSWconcentration 98%SSWconcentration 98%---
Mean wind speed (mph)-------------------------------
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