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M2 wave buoy daily means for Oct 2024

Daily means from the M2 wave buoy for Oct 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

722 wave-buoy observations covered all 31 days. Typical wave height was 4.2 ft (10th–90th percentile 1.9–7.7 ft), while mean peak wave period was 6 seconds (10th–90th percentile 3.3–9.1 seconds). Typical wind was 18.7 mph (10th–90th percentile 9.7–28 mph) and mean water temperature was 14.6°C (10th–90th percentile 14.4–14.8°C). 8 of 4,332 checked values (0.2%) were excluded by quality control. Across 14 comparable years, mean wave height was above the same-month mean of 4.3 ft and mean wave period was above the same-month mean of 5.7 seconds.

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

Typical Significant Wave Height

4.2ft
Mean: 4.5 ft
P10–P90: 1.9 — 7.7 ft
Recorded extremes

0.8 — 14.6 ft

Mean Observed Wave Period

6secs
P10–P90: 3.3 — 9.1secs
Recorded extremes

2.6 — 20secs

Available for 714 of 722 hourly samples

Typical Observed Wind

SSW, 18.7mph
Mean: 18.8 mph
P10–P90: 9.7 — 28 mph
Recorded extremes

2 — 41.3 mph

Circular concentration: 44%

Mean Water Temperature

14.6°C
P10–P90: 14.4 — 14.8°C
Recorded extremes

14.3 — 15°C

Compared With Previous Octobers

Historical baseline from 9,645 observations across 14 years.

Wave Height
4.5ft
0.2ft above mean
Historical mean 4.331ft
Wave Period
6s
0.3s above mean
Historical mean 5.7s
Water Temperature
14.6°C
0.3°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 Oct 2024Last observation shown
Metric
Mean significant wave height (ft)5536773375344343463QC rejected74485554212
Mean maximum wave height (ft)885101211551174665656106171066139876323
Mean peak period (s)56567854696410556767876577755353
Mean zero-crossing period (s)5545554455445444455654455544333
Mean peak wave directionNNEconcentration 94%NEconcentration 94%Econcentration 81%SSEconcentration 96%SSEconcentration 100%SSEconcentration 98%Sconcentration 97%Econcentration 69%NNEconcentration 90%Variableconcentration 26%WSWconcentration 63%WSWconcentration 68%SSWconcentration 40%SEconcentration 64%SEconcentration 96%ESEconcentration 74%Sconcentration 97%Sconcentration 87%Sconcentration 99%Sconcentration 96%SSWconcentration 94%Sconcentration 92%Sconcentration 99%SSEconcentration 100%SEconcentration 76%Sconcentration 86%Wconcentration 47%SSWconcentration 68%NWconcentration 96%SSWconcentration 63%SWconcentration 78%
Mean wave directionNNEconcentration 95%NEconcentration 95%Econcentration 88%SSEconcentration 98%SSEconcentration 100%SSEconcentration 100%Sconcentration 98%ESEconcentration 87%NNEconcentration 99%NEconcentration 95%Wconcentration 82%WSWconcentration 70%Variableconcentration 18%SEconcentration 90%SEconcentration 99%SEconcentration 83%Sconcentration 98%Sconcentration 96%Sconcentration 99%Sconcentration 96%SSWconcentration 97%SSWconcentration 93%Sconcentration 99%SSEconcentration 99%SEconcentration 92%Sconcentration 87%WSWconcentration 58%SSWconcentration 90%NWconcentration 94%SSWconcentration 81%SWconcentration 85%
Mean directional spread (°)182.2142.1211.2142.0114.8137.3183.5237.1136.9151.0138.8159.1116.9212.5226.4243.6174.1154.7148.9119.7138.5144.2173.697.8161.4135.2177.2139.6185.1192.0233.2
Mean wind directionNconcentration 93%ENEconcentration 91%SEconcentration 93%Sconcentration 100%Sconcentration 99%Sconcentration 96%Sconcentration 86%Econcentration 74%NNEconcentration 96%Nconcentration 87%WSWconcentration 88%Wconcentration 86%SWconcentration 31%ESEconcentration 67%SSEconcentration 97%SSEconcentration 80%SSWconcentration 96%SSWconcentration 96%SWconcentration 91%SSWconcentration 95%SWconcentration 98%SWconcentration 88%SSWconcentration 97%Sconcentration 95%SEconcentration 89%SSWconcentration 75%WSWconcentration 79%WSWconcentration 88%WNWconcentration 98%SWconcentration 88%WSWconcentration 88%
Mean wind speed (mph)2122162527221614251714221412191519261535241519271421221611119
Mean water temperature(°C)14.714.614.614.514.614.614.714.814.814.814.814.714.714.614.614.614.614.614.614.614.614.514.514.414.414.514.514.414.414.414.4

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