Skip to content
Surfhog home
Menu

M2 wave buoy daily means for Jan 2025

Daily means from the M2 wave buoy for Jan 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

719 wave-buoy observations covered all 31 days. Typical wave height was 4.6 ft (10th–90th percentile 2.3–8.5 ft), while mean peak wave period was 6.4 seconds (10th–90th percentile 4–11.1 seconds). Typical wind was 21.6 mph (10th–90th percentile 10.2–30.4 mph) and mean water temperature was 10.7°C (10th–90th percentile 10–11.2°C). 14 of 4,314 checked values (0.3%) were excluded by quality control. Across 13 comparable years, mean wave height was the same as the same-month mean of 5.2 ft and mean wave period was above the same-month mean of 5.8 seconds.

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

Typical Significant Wave Height

4.6ft
Mean: 5.2 ft
P10–P90: 2.3 — 8.5 ft
Recorded extremes

1.2 — 18.1 ft

Mean Observed Wave Period

6.4secs
P10–P90: 4 — 11.1secs
Recorded extremes

2.5 — 18.2secs

Available for 705 of 719 hourly samples

Typical Observed Wind

SW, 21.6mph
Mean: 21.1 mph
P10–P90: 10.2 — 30.4 mph
Recorded extremes

2 — 49.4 mph

Circular concentration: 44%

Mean Water Temperature

10.7°C
P10–P90: 10 — 11.2°C
Recorded extremes

9.8 — 11.4°C

Compared With Previous Januarys

Historical baseline from 8,820 observations across 13 years.

Wave Height
5.2ft
0ft above mean
Historical mean 5.151ft
Wave Period
6.4s
0.6s above mean
Historical mean 5.8s
Water Temperature
10.7°C
0.7°C above mean
Historical mean 10°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 Jan 2025Last observation shown
Metric
Mean significant wave height (ft)644388534354QC rejected44566443251368116544
Mean maximum wave height (ft)1067413139465871367810976437219131710766
Mean peak period (s)955677561086577556655635998129545
Mean zero-crossing period (s)5444554444546545554443465576444
Mean peak wave directionSWconcentration 58%Nconcentration 91%NWconcentration 93%SSWconcentration 35%ENEconcentration 93%Nconcentration 83%NWconcentration 97%Nconcentration 51%SWconcentration 51%SEconcentration 77%SSEconcentration 92%SSEconcentration 94%Sconcentration 99%Sconcentration 98%Sconcentration 98%Sconcentration 97%Sconcentration 98%SSEconcentration 98%SSEconcentration 97%Sconcentration 97%SSWconcentration 98%Wconcentration 57%SWconcentration 83%SSWconcentration 79%SSWconcentration 93%SSEconcentration 88%SSEconcentration 98%Variableconcentration 15%NNWconcentration 72%WNWconcentration 50%Variableconcentration 30%
Mean wave directionWconcentration 72%Nconcentration 86%NWconcentration 94%SSWconcentration 41%ENEconcentration 94%Nconcentration 86%NWconcentration 98%Nconcentration 94%NWconcentration 93%ESEconcentration 73%SSEconcentration 92%SSEconcentration 96%Sconcentration 99%Sconcentration 97%Sconcentration 98%Sconcentration 98%Sconcentration 99%SSEconcentration 97%SSEconcentration 98%Sconcentration 97%SSWconcentration 97%WSWconcentration 66%SWconcentration 88%SWconcentration 83%SWconcentration 92%SSEconcentration 85%Sconcentration 99%Variableconcentration 17%NNWconcentration 80%NWconcentration 61%Variableconcentration 26%
Mean directional spread (°)128.4218.5222.4155.6116.0127.8177.1198.7151.6172.2170.5187.1106.3142.2177.7168.0137.2134.9207.4204.3160.2236.5160.6115.0140.2113.2124.1132.9199.0215.6202.5
Mean wind directionWNWconcentration 73%NNWconcentration 87%Wconcentration 98%SSWconcentration 40%NEconcentration 90%NWconcentration 84%WNWconcentration 98%Nconcentration 76%NWconcentration 94%ESEconcentration 90%SSWconcentration 74%Sconcentration 93%SSWconcentration 100%Sconcentration 89%SSWconcentration 98%SSWconcentration 98%SSWconcentration 99%Sconcentration 99%Sconcentration 97%SSWconcentration 97%WSWconcentration 94%Wconcentration 86%SWconcentration 86%SWconcentration 88%WSWconcentration 92%Sconcentration 83%Sconcentration 95%Nconcentration 41%NWconcentration 94%Wconcentration 79%WNWconcentration 73%
Mean wind speed (mph)24182113293024111715182130122325272419171011243825262819202117
Mean water temperature(°C)11.311.211.111.211.211.111.111.111.111.010.910.910.910.810.810.810.810.710.710.610.610.610.610.410.310.310.110.010.010.09.9

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