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M2 wave buoy daily means for Nov 2024

Daily means from the M2 wave buoy for Nov 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

699 wave-buoy observations covered all 30 days. Typical wave height was 3.1 ft (10th–90th percentile 1.2–8.5 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 2.9–9.6 seconds). Typical wind was 16.1 mph (10th–90th percentile 8.4–29.7 mph) and mean water temperature was 13.8°C (10th–90th percentile 13.2–14.3°C). 5 of 4,194 checked values (0.1%) were excluded by quality control. Across 13 comparable years, mean wave height was below the same-month mean of 5 ft and mean wave period was below the same-month mean of 6 seconds.

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

Typical Significant Wave Height

3.1ft
Mean: 4 ft
P10–P90: 1.2 — 8.5 ft
Recorded extremes

0.4 — 15.8 ft

Available for 698 of 699 hourly samples

Mean Observed Wave Period

5.3secs
P10–P90: 2.9 — 9.6secs
Recorded extremes

2.5 — 13.4secs

Available for 695 of 699 hourly samples

Typical Observed Wind

Variable, 16.1mph
Mean: 17.7 mph
P10–P90: 8.4 — 29.7 mph
Recorded extremes

1 — 42.6 mph

Circular concentration: 24%

Mean Water Temperature

13.8°C
P10–P90: 13.2 — 14.3°C
Recorded extremes

13.1 — 14.4°C

Compared With Previous Novembers

Historical baseline from 9,194 observations across 13 years.

Wave Height
4ft
1ft below mean
Historical mean 4.987ft
Wave Period
5.3s
0.7s below mean
Historical mean 6s
Water Temperature
13.8°C
0.4°C above mean
Historical mean 13.4°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 Nov 2024Last observation shown
Metric
Mean significant wave height (ft)21222344332122234365461111842597
Mean maximum wave height (ft)3233457645323435651086101718125481411
Mean peak period (s)33344555445434344465558111186886
Mean zero-crossing period (s)333434444443343444544466544565
Mean peak wave directionWNWconcentration 83%SEconcentration 42%SEconcentration 85%SEconcentration 91%SEconcentration 90%SSEconcentration 98%SSEconcentration 98%SSEconcentration 95%SEconcentration 82%SSWconcentration 48%NNEconcentration 62%NEconcentration 37%WNWconcentration 69%Nconcentration 82%SSWconcentration 44%WNWconcentration 63%NWconcentration 94%NEconcentration 81%NEconcentration 89%Nconcentration 95%Nconcentration 85%NWconcentration 93%Sconcentration 95%Sconcentration 99%SSWconcentration 99%SSWconcentration 78%Econcentration 54%SSEconcentration 99%SSEconcentration 100%Sconcentration 99%
Mean wave directionWconcentration 78%ESEconcentration 74%SEconcentration 82%SEconcentration 97%SSEconcentration 95%SSEconcentration 99%SSEconcentration 99%SSEconcentration 98%SSEconcentration 95%SSWconcentration 57%NNEconcentration 87%Econcentration 59%WNWconcentration 63%Nconcentration 80%SWconcentration 38%WNWconcentration 74%NWconcentration 96%NEconcentration 86%NEconcentration 90%Nconcentration 97%Nconcentration 83%WNWconcentration 88%Sconcentration 95%SSWconcentration 100%SWconcentration 99%SWconcentration 85%Econcentration 66%SEconcentration 96%SSEconcentration 99%Sconcentration 99%
Mean directional spread (°)185.7236.9224.9235.3232.5230.9176.5226.3245.2224.2190.7224.1194.1214.7234.4209.2230.8205.6135.7190.8204.4184.9117.6115.9120.5135.5180.1104.7103.0121.3
Mean wind directionWconcentration 75%SSEconcentration 96%SEconcentration 93%SSEconcentration 95%SSEconcentration 89%Sconcentration 99%Sconcentration 98%SSEconcentration 96%SEconcentration 81%WSWconcentration 64%Nconcentration 96%NEconcentration 96%NWconcentration 92%Nconcentration 80%SWconcentration 92%WNWconcentration 90%WNWconcentration 94%ENEconcentration 72%NEconcentration 73%NWconcentration 97%NWconcentration 59%Wconcentration 83%Sconcentration 96%SWconcentration 99%WSWconcentration 99%Wconcentration 67%NNEconcentration 81%SSEconcentration 91%Sconcentration 99%SSWconcentration 98%
Mean wind speed (mph)1291211141720161114119111213191818221920243433271312222927
Mean water temperature(°C)14.414.314.314.314.214.214.214.214.114.114.114.114.014.013.913.913.813.813.713.713.713.613.513.513.413.313.313.213.113.1

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