Skip to content
Surfhog home
Menu

M2 wave buoy daily means for Aug 2011

Daily means from the M2 wave buoy for Aug 2011, 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

743 wave-buoy observations covered all 31 days. Typical wave height was 2.3 ft (10th–90th percentile 1–4.4 ft), while mean peak wave period was 5.2 seconds (10th–90th percentile 3.4–7.1 seconds). Mean water temperature was 14.8°C (10th–90th percentile 14.4–15.3°C). 6 of 2,964 checked values (0.2%) were excluded by quality control. Across 1 comparable year, mean wave height was below the same-month mean of 2.7 ft and mean wave period was above the same-month mean of 4 seconds.

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

Typical Significant Wave Height

2.3ft
Mean: 2.5 ft
P10–P90: 1 — 4.4 ft
Recorded extremes

0.5 — 7.4 ft

Available for 735 of 743 hourly samples

Mean Observed Wave Period

5.2secs
P10–P90: 3.4 — 7.1secs
Recorded extremes

2.3 — 15.1secs

Available for 737 of 743 hourly samples

Typical Observed Wind

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

Available for 0 of 743 hourly samples

Mean Water Temperature

14.8°C
P10–P90: 14.4 — 15.3°C
Recorded extremes

13.7 — 16.4°C

Compared With Previous Augusts

Historical baseline from 574 observations across 1 year.

Wave Height
2.5ft
0.2ft below mean
Historical mean 2.657ft
Wave Period
5.2s
1.2s above mean
Historical mean 4s
Water Temperature
14.8°C
Not enough comparable data

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 2011Last observation shown
Metric
Mean significant wave height (ft)1122313335433234213431134233421
Mean maximum wave height (ft)1123423557644335213541145355531
Mean peak period (s)6546555555765446645665445644547
Mean zero-crossing period (s)4444444444544444434444444444443
Mean peak wave directionSconcentration 93%Sconcentration 58%Sconcentration 73%Sconcentration 90%WSWconcentration 50%Sconcentration 65%SWconcentration 68%NWconcentration 70%NNWconcentration 81%Sconcentration 98%Sconcentration 96%Sconcentration 90%SSEconcentration 93%WSWconcentration 75%SWconcentration 79%SSWconcentration 67%Variableconcentration 18%NEconcentration 55%SSWconcentration 37%Sconcentration 99%Sconcentration 99%WSWconcentration 48%ENEconcentration 65%Sconcentration 87%Sconcentration 98%Sconcentration 56%WNWconcentration 82%NWconcentration 97%NWconcentration 97%NNWconcentration 64%SEconcentration 31%
Mean wave directionSSEconcentration 96%Sconcentration 79%Sconcentration 89%Sconcentration 94%WSWconcentration 63%Sconcentration 93%SWconcentration 79%WNWconcentration 73%Nconcentration 81%Sconcentration 98%Sconcentration 99%Sconcentration 99%Sconcentration 98%SWconcentration 95%SWconcentration 86%SSWconcentration 87%Variableconcentration 22%NEconcentration 60%SWconcentration 44%Sconcentration 99%Sconcentration 99%SSWconcentration 53%Econcentration 73%Sconcentration 88%Sconcentration 99%SSWconcentration 43%Wconcentration 88%NWconcentration 97%NWconcentration 98%NNWconcentration 62%ENEconcentration 67%
Mean directional spread (°)34.032.933.730.529.934.425.626.734.620.924.128.527.332.026.328.836.828.532.524.323.736.031.118.621.128.127.827.129.737.533.6
Mean wind direction-------------------------------
Mean wind speed (mph)-------------------------------
Mean water temperature(°C)14.314.414.514.714.815.015.114.914.414.615.215.215.215.214.814.614.714.514.514.514.915.515.415.415.014.914.814.814.514.614.5

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