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M2 wave buoy daily means for Aug 2019

Daily means from the M2 wave buoy for Aug 2019, 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

739 wave-buoy observations covered all 31 days. Typical wave height was 3.1 ft (10th–90th percentile 0.8–5.8 ft), while mean peak wave period was 5.5 seconds (10th–90th percentile 3.4–7.6 seconds). Typical wind was 14.4 mph (10th–90th percentile 6.1–21.9 mph) and mean water temperature was 14.9°C (10th–90th percentile 13.9–15.9°C). All 2,958 checked values passed quality control. Across 8 comparable years, mean wave height was above the same-month mean of 2.7 ft and mean wave period was the same as the same-month mean of 5.5 seconds.

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

Typical Significant Wave Height

3.1ft
Mean: 3.2 ft
P10–P90: 0.8 — 5.8 ft
Recorded extremes

0.4 — 10.8 ft

Available for 247 of 739 hourly samples

Mean Observed Wave Period

5.5secs
P10–P90: 3.4 — 7.6secs
Recorded extremes

2.3 — 12.3secs

Available for 247 of 739 hourly samples

Typical Observed Wind

SSW, 14.4mph
Mean: 14.3 mph
P10–P90: 6.1 — 21.9 mph
Recorded extremes

0.7 — 37 mph

Circular concentration: 58%

Mean Water Temperature

14.9°C
P10–P90: 13.9 — 15.9°C
Recorded extremes

12.9 — 16.9°C

Compared With Previous Augusts

Historical baseline from 4,443 observations across 8 years.

Wave Height
3.2ft
0.5ft above mean
Historical mean 2.69ft
Wave Period
5.5s
In line with the historical mean
Historical mean 5.5s
Water Temperature
14.9°C
0.6°C above mean
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 2019Last observation shown
Metric
Mean significant wave height (ft)2112342157432346443344311123466
Mean maximum wave height (ft)3002453289633458765456511025699
Mean peak period (s)56766565610644556754456535544567
Mean zero-crossing period (s)4444444456543445544445433334455
Mean peak wave directionNNEconcentration 74%Variableconcentration 21%SSEconcentration 59%Sconcentration 99%Sconcentration 99%Sconcentration 99%SSEconcentration 99%SEconcentration 31%ESEconcentration 60%Sconcentration 100%WNWconcentration 35%Wconcentration 37%WSWconcentration 59%Sconcentration 93%WSWconcentration 58%Sconcentration 99%Sconcentration 100%Sconcentration 94%WSWconcentration 98%SWconcentration 75%Sconcentration 97%SSEconcentration 98%Sconcentration 99%SSEconcentration 97%SSEconcentration 69%Sconcentration 68%Sconcentration 96%SWconcentration 78%Sconcentration 99%Sconcentration 100%Sconcentration 63%
Mean wave directionNEconcentration 76%Variableconcentration 28%ESEconcentration 73%Sconcentration 99%Sconcentration 99%Sconcentration 99%Sconcentration 97%SSEconcentration 60%ESEconcentration 71%Sconcentration 100%Wconcentration 56%WNWconcentration 35%SWconcentration 79%Sconcentration 95%WSWconcentration 63%Sconcentration 100%Sconcentration 99%Sconcentration 99%SWconcentration 99%SWconcentration 81%Sconcentration 99%Sconcentration 100%Sconcentration 100%SSEconcentration 95%SSEconcentration 97%SSWconcentration 84%Sconcentration 98%SSWconcentration 90%Sconcentration 100%Sconcentration 100%SSWconcentration 86%
Mean directional spread (°)41.044.328.125.126.027.826.730.225.521.832.730.825.326.431.119.220.928.331.531.624.125.524.630.942.234.520.728.125.520.922.9
Mean wind directionNWconcentration 70%NEconcentration 64%ESEconcentration 85%SSEconcentration 96%SSWconcentration 92%SSWconcentration 94%WSWconcentration 94%NNEconcentration 45%SEconcentration 85%SWconcentration 94%WNWconcentration 97%Wconcentration 75%WSWconcentration 70%SSWconcentration 78%WSWconcentration 63%SSWconcentration 94%SWconcentration 94%SWconcentration 96%Wconcentration 98%WSWconcentration 87%SSWconcentration 96%SSWconcentration 98%Sconcentration 98%SEconcentration 84%Sconcentration 88%SSWconcentration 32%Sconcentration 99%SWconcentration 82%SSWconcentration 99%SSWconcentration 98%WSWconcentration 72%
Mean wind speed (mph)45713171411919181512131316221818161618151710771516202320
Mean water temperature(°C)14.514.313.714.414.615.315.515.514.113.914.214.414.414.914.814.715.015.315.315.215.014.915.215.715.815.815.715.615.315.215.0

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