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M2 wave buoy daily means for Feb 2025

Daily means from the M2 wave buoy for Feb 2025, 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

298 wave-buoy observations covered 14 of 28 days (50%). Typical wave height was 4.2 ft (10th–90th percentile 1.5–7.7 ft), while mean peak wave period was 6.6 seconds (10th–90th percentile 4–10.5 seconds). Typical wind was 20 mph (10th–90th percentile 8.3–30.2 mph) and mean water temperature was 9.4°C (10th–90th percentile 8.9–9.8°C). 7 of 1,788 checked values (0.4%) were excluded by quality control. Across 15 comparable years, mean wave height was below the same-month mean of 4.9 ft and mean wave period was above the same-month mean of 5.9 seconds.

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

Typical Significant Wave Height

4.2ft
Mean: 4.6 ft
P10–P90: 1.5 — 7.7 ft
Recorded extremes

1.2 — 10.8 ft

Available for 296 of 298 hourly samples

Mean Observed Wave Period

6.6secs
P10–P90: 4 — 10.5secs
Recorded extremes

2.6 — 20secs

Available for 294 of 298 hourly samples

Typical Observed Wind

SW, 20mph
Mean: 20.1 mph
P10–P90: 8.3 — 30.2 mph
Recorded extremes

0 — 39 mph

Circular concentration: 33%

Mean Water Temperature

9.4°C
P10–P90: 8.9 — 9.8°C
Recorded extremes

8.6 — 9.9°C

Available for 297 of 298 hourly samples

Compared With Previous Februarys

Historical baseline from 7,963 observations across 15 years.

Wave Height
4.6ft
0.3ft below mean
Historical mean 4.856ft
Wave Period
6.6s
0.7s above mean
Historical mean 5.9s
Water Temperature
9.4°C
0.6°C above mean
Historical mean 8.8°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 Feb 2025Last observation shown
Metric
Mean significant wave height (ft)5768426----34----------54532
Mean maximum wave height (ft)9121013639----56----------86863
Mean peak period (s)68676116----55-----------5555
Mean zero-crossing period (s)5656565----55----------54444
Mean peak wave directionSSEconcentration 98%Sconcentration 98%SSWconcentration 88%WSWconcentration 95%WSWconcentration 56%SSEconcentration 41%NNEconcentration 98%----NNEconcentration 91%NEconcentration 86%----------Sconcentration 99%WSWconcentration 87%WSWconcentration 69%NNWconcentration 65%SSWconcentration 60%
Mean wave directionSSEconcentration 99%SSEconcentration 98%SSWconcentration 89%WSWconcentration 98%SWconcentration 80%SSEconcentration 49%NNEconcentration 99%----NEconcentration 95%NEconcentration 90%----------SSWconcentration 100%SWconcentration 98%WSWconcentration 75%NNWconcentration 63%Sconcentration 71%
Mean directional spread (°)148.6113.8124.0113.6186.6140.5104.7----173.5167.8----------158.8154.1170.3206.7207.4
Mean wind directionSconcentration 100%SSWconcentration 93%SSWconcentration 96%SWconcentration 73%Wconcentration 94%ESEconcentration 69%NEconcentration 96%----ENEconcentration 96%Econcentration 90%----------SWconcentration 96%Wconcentration 95%Wconcentration 77%NWconcentration 98%SWconcentration 73%
Mean wind speed (mph)26222829181026----1918----------1818231411
Mean water temperature(°C)9.99.89.89.89.89.89.7----9.59.4----------9.08.98.88.99.0

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