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M2 wave buoy daily means for Feb 2023

Daily means from the M2 wave buoy for Feb 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

663 wave-buoy observations covered all 28 days. Typical wave height was 3.5 ft (10th–90th percentile 2.3–5.4 ft), while mean peak wave period was 5.2 seconds (10th–90th percentile 3.8–6.7 seconds). Typical wind was 18.1 mph (10th–90th percentile 11.2–24.6 mph) and mean water temperature was 9.3°C (10th–90th percentile 9.1–9.5°C). 7 of 3,978 checked values (0.2%) were excluded by quality control. Across 13 comparable years, mean wave height was below the same-month mean of 5.1 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

3.5ft
Mean: 3.7 ft
P10–P90: 2.3 — 5.4 ft
Recorded extremes

0.8 — 8.8 ft

Mean Observed Wave Period

5.2secs
P10–P90: 3.8 — 6.7secs
Recorded extremes

2.5 — 18.2secs

Available for 656 of 663 hourly samples

Typical Observed Wind

SW, 18.1mph
Mean: 18 mph
P10–P90: 11.2 — 24.6 mph
Recorded extremes

5.4 — 31.4 mph

Circular concentration: 41%

Mean Water Temperature

9.3°C
P10–P90: 9.1 — 9.5°C
Recorded extremes

8.9 — 9.9°C

Compared With Previous Februarys

Historical baseline from 6,681 observations across 13 years.

Wave Height
3.7ft
1.4ft below mean
Historical mean 5.085ft
Wave Period
5.2s
0.8s below mean
Historical mean 6s
Water Temperature
9.3°C
0.6°C above mean
Historical mean 8.7°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 Feb 2023Last observation shown
Metric
Mean significant wave height (ft)5433333QC rejected33224555454445444333
Mean maximum wave height (ft)9755554955336888776767766655
Mean peak period (s)5555554645475667655655555549
Mean zero-crossing period (s)4444444444344455544444444444
Mean peak wave directionWSWconcentration 98%SWconcentration 95%SSWconcentration 81%Sconcentration 68%Variableconcentration 24%Sconcentration 98%Sconcentration 97%Sconcentration 99%Wconcentration 92%SSWconcentration 91%SSWconcentration 91%Sconcentration 91%Sconcentration 99%Sconcentration 99%Sconcentration 100%Sconcentration 98%Sconcentration 92%SWconcentration 74%WSWconcentration 58%SSEconcentration 96%Sconcentration 97%NWconcentration 71%NNEconcentration 80%NNWconcentration 82%NEconcentration 88%ENEconcentration 92%ENEconcentration 92%ENEconcentration 47%
Mean wave directionWSWconcentration 98%SWconcentration 99%SSWconcentration 96%Sconcentration 71%Variableconcentration 27%Sconcentration 99%Sconcentration 99%Sconcentration 100%WSWconcentration 95%SSWconcentration 97%SSWconcentration 98%Sconcentration 98%Sconcentration 100%Sconcentration 100%Sconcentration 100%Sconcentration 99%SSWconcentration 96%SWconcentration 90%WSWconcentration 69%Sconcentration 97%Sconcentration 98%NWconcentration 69%NNEconcentration 81%NNWconcentration 83%ENEconcentration 93%ENEconcentration 97%Econcentration 99%NEconcentration 98%
Mean directional spread (°)182.3215.3193.6169.7194.5181.2180.8138.5174.7161.6176.2159.6147.8123.7129.8110.3150.4159.9178.0140.8160.4167.3169.3173.0163.8189.3199.7191.3
Mean wind directionWconcentration 98%WSWconcentration 99%SWconcentration 93%WSWconcentration 64%Variableconcentration 28%SSWconcentration 99%SSWconcentration 95%SSWconcentration 91%Wconcentration 91%SWconcentration 92%SWconcentration 89%Sconcentration 97%SSEconcentration 98%SSEconcentration 98%SSWconcentration 85%SWconcentration 82%SWconcentration 81%WSWconcentration 94%WSWconcentration 80%SWconcentration 95%SSWconcentration 95%NWconcentration 87%Nconcentration 85%NNWconcentration 87%NEconcentration 99%ENEconcentration 99%ENEconcentration 97%NNEconcentration 93%
Mean wind speed (mph)25211516171813251816111319212117172017151923171918171617
Mean water temperature(°C)9.89.69.59.59.59.39.39.39.29.29.29.29.29.29.29.29.29.29.29.29.29.29.29.29.29.29.29.0

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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