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M2 wave buoy daily means for Nov 2023

Daily means from the M2 wave buoy for Nov 2023, 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

710 wave-buoy observations covered all 30 days. Typical wave height was 5 ft (10th–90th percentile 2.3–6.9 ft), while mean peak wave period was 5.9 seconds (10th–90th percentile 3.9–9.1 seconds). Typical wind was 21.1 mph (10th–90th percentile 10.7–27.6 mph) and mean water temperature was 13.9°C (10th–90th percentile 13.2–14.8°C). 4 of 4,260 checked values (0.1%) were excluded by quality control. Across 12 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

5ft
Mean: 4.8 ft
P10–P90: 2.3 — 6.9 ft
Recorded extremes

0.8 — 12.3 ft

Mean Observed Wave Period

5.9secs
P10–P90: 3.9 — 9.1secs
Recorded extremes

2.6 — 16.6secs

Available for 706 of 710 hourly samples

Typical Observed Wind

W, 21.1mph
Mean: 20.3 mph
P10–P90: 10.7 — 27.6 mph
Recorded extremes

1.6 — 45.7 mph

Circular concentration: 43%

Mean Water Temperature

13.9°C
P10–P90: 13.2 — 14.8°C
Recorded extremes

12.8 — 15°C

Compared With Previous Novembers

Historical baseline from 8,484 observations across 12 years.

Wave Height
4.8ft
0.2ft below mean
Historical mean 4.987ft
Wave Period
5.9s
0.1s below mean
Historical mean 6s
Water Temperature
13.9°C
0.5°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 2023Last observation shown
Metric
Mean significant wave height (ft)QC rejected55456576435855247765355235335
Mean maximum wave height (ft)11877798119759148947121198599258549
Mean peak period (s)8976125587546765657665455455446
Mean zero-crossing period (s)554454455445554445554444344434
Mean peak wave directionSSEconcentration 95%SSEconcentration 38%Wconcentration 53%ESEconcentration 75%Sconcentration 62%WSWconcentration 99%Wconcentration 90%Sconcentration 98%SSWconcentration 85%NWconcentration 52%Nconcentration 49%SEconcentration 94%SSWconcentration 68%SSWconcentration 73%Wconcentration 87%Sconcentration 82%SWconcentration 78%SSEconcentration 99%SSWconcentration 83%NWconcentration 32%Nconcentration 85%WSWconcentration 97%Wconcentration 86%Nconcentration 90%ENEconcentration 32%SSEconcentration 91%NNWconcentration 79%NNEconcentration 70%NNEconcentration 90%ENEconcentration 93%
Mean wave directionSSEconcentration 90%Variableconcentration 29%Wconcentration 56%ESEconcentration 74%WSWconcentration 63%WSWconcentration 99%WSWconcentration 91%SSWconcentration 95%SSWconcentration 95%NWconcentration 57%Nconcentration 47%SEconcentration 97%SSWconcentration 83%SSWconcentration 87%Wconcentration 92%SSEconcentration 76%SSWconcentration 89%Sconcentration 99%SSWconcentration 94%WNWconcentration 46%Nconcentration 90%WSWconcentration 99%Wconcentration 88%Nconcentration 92%ENEconcentration 58%SSEconcentration 93%NNWconcentration 73%NNEconcentration 65%NNEconcentration 89%ENEconcentration 95%
Mean directional spread (°)144.7147.6153.5149.6190.1203.7198.7117.1145.0184.5210.1172.4135.3163.7178.0184.5176.2109.9137.3143.4147.0182.4167.5150.2219.0183.4152.8195.3184.2140.1
Mean wind directionSconcentration 71%NNWconcentration 69%WNWconcentration 95%ENEconcentration 64%WNWconcentration 90%Wconcentration 100%Wconcentration 90%WSWconcentration 83%WSWconcentration 90%NWconcentration 90%Nconcentration 44%SSEconcentration 65%SWconcentration 71%WSWconcentration 93%Wconcentration 98%Sconcentration 39%WSWconcentration 62%SSWconcentration 95%WSWconcentration 90%NWconcentration 86%NWconcentration 87%WSWconcentration 96%WNWconcentration 94%NNWconcentration 91%Wconcentration 58%Sconcentration 74%NNWconcentration 84%Nconcentration 84%NNEconcentration 94%NEconcentration 91%
Mean wind speed (mph)23201918192521262218142131232211192325241820252091722131621
Mean water temperature(°C)14.914.914.914.714.614.414.314.114.014.114.214.114.014.114.114.013.913.813.613.613.713.613.513.413.413.213.213.213.113.1

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