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M2 wave buoy daily means for Aug 2024

Daily means from the M2 wave buoy for Aug 2024, 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

723 wave-buoy observations covered all 31 days. Typical wave height was 3.1 ft (10th–90th percentile 1.5–6.5 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 3–7.7 seconds). Typical wind was 14.3 mph (10th–90th percentile 7.5–22.8 mph) and mean water temperature was 14.9°C (10th–90th percentile 14.2–15.8°C). 3 of 4,338 checked values (0.1%) were excluded by quality control. Across 13 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 5.3 seconds.

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

Typical Significant Wave Height

3.1ft
Mean: 3.6 ft
P10–P90: 1.5 — 6.5 ft
Recorded extremes

0.4 — 11.5 ft

Mean Observed Wave Period

5.3secs
P10–P90: 3 — 7.7secs
Recorded extremes

2.5 — 14.3secs

Available for 720 of 723 hourly samples

Typical Observed Wind

SW, 14.3mph
Mean: 14.9 mph
P10–P90: 7.5 — 22.8 mph
Recorded extremes

0.8 — 37.7 mph

Circular concentration: 69%

Mean Water Temperature

14.9°C
P10–P90: 14.2 — 15.8°C
Recorded extremes

13.6 — 16.9°C

Compared With Previous Augusts

Historical baseline from 8,132 observations across 13 years.

Wave Height
3.6ft
0.9ft above mean
Historical mean 2.69ft
Wave Period
5.3s
In line with the historical mean
Historical mean 5.3s
Water Temperature
14.9°C
0.1°C above mean
Historical mean 14.8°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 2024Last observation shown
Metric
Mean significant wave height (ft)QC rejected424QC rejected3334213QC rejected2QC rejected2325557645474312
Mean maximum wave height (ft)2646105656425848444888119686126423
Mean peak period (s)5544665556546664446859756675444
Mean zero-crossing period (s)3444544444444454344545544454443
Mean peak wave directionVariableconcentration 29%Sconcentration 97%WSWconcentration 77%SWconcentration 79%Sconcentration 99%Sconcentration 96%Sconcentration 94%SSEconcentration 99%SWconcentration 79%Sconcentration 99%SSEconcentration 54%SEconcentration 63%Sconcentration 99%SWconcentration 34%Sconcentration 100%SWconcentration 73%SWconcentration 86%SWconcentration 81%Sconcentration 98%SSWconcentration 80%SSWconcentration 79%Sconcentration 99%SSWconcentration 68%SWconcentration 65%SSWconcentration 68%Sconcentration 98%Sconcentration 99%Sconcentration 97%SSWconcentration 85%Variableconcentration 18%Econcentration 80%
Mean wave directionSEconcentration 57%Sconcentration 97%SWconcentration 93%SSWconcentration 93%Sconcentration 100%SSWconcentration 97%SSWconcentration 99%Sconcentration 98%SWconcentration 97%Sconcentration 99%SEconcentration 78%SSEconcentration 67%Sconcentration 94%Sconcentration 30%Sconcentration 99%SSWconcentration 90%SSWconcentration 92%SSWconcentration 88%Sconcentration 98%SWconcentration 88%SSWconcentration 85%Sconcentration 99%SSWconcentration 83%SWconcentration 83%SSWconcentration 80%SSWconcentration 97%Sconcentration 99%Sconcentration 99%SSWconcentration 96%Variableconcentration 20%Econcentration 89%
Mean directional spread (°)193.7181.3169.6192.1126.0163.5190.5172.5188.3168.0206.0213.0174.1152.1118.8149.4164.8187.2168.2156.6196.1110.7166.7183.3164.5166.2108.9188.7202.5229.4216.9
Mean wind directionWSWconcentration 56%SSWconcentration 84%WSWconcentration 86%SSWconcentration 96%SSWconcentration 91%SWconcentration 90%SWconcentration 98%SSWconcentration 84%WSWconcentration 89%SSWconcentration 97%ESEconcentration 74%Sconcentration 72%SWconcentration 58%WSWconcentration 52%WSWconcentration 66%WSWconcentration 86%SWconcentration 95%SWconcentration 85%SSWconcentration 86%WSWconcentration 93%SWconcentration 93%SWconcentration 87%SWconcentration 77%WSWconcentration 95%SWconcentration 97%SSWconcentration 93%SSWconcentration 99%SSWconcentration 92%SWconcentration 90%Nconcentration 67%Econcentration 91%
Mean wind speed (mph)7171317201414141498131711161313131820212022162017231311711
Mean water temperature(°C)16.215.715.315.114.714.414.114.214.315.115.314.915.015.615.715.715.615.415.215.014.614.614.414.514.414.514.514.214.415.114.8

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