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M2 wave buoy daily means for Oct 2025

Daily means from the M2 wave buoy for Oct 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

659 wave-buoy observations covered 28 of 31 days (90%). Typical wave height was 3.5 ft (10th–90th percentile 0.8–7.7 ft), while mean peak wave period was 5.1 seconds (10th–90th percentile 2.8–7.1 seconds). Typical wind was 16.9 mph (10th–90th percentile 6–29.1 mph). 3 of 3,295 checked values (0.1%) were excluded by quality control. Across 15 comparable years, mean wave height was below the same-month mean of 4.4 ft and mean wave period was below the same-month mean of 5.7 seconds.

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

Typical Significant Wave Height

3.5ft
Mean: 4.1 ft
P10–P90: 0.8 — 7.7 ft
Recorded extremes

0.4 — 19.2 ft

Mean Observed Wave Period

5.1secs
P10–P90: 2.8 — 7.1secs
Recorded extremes

2.6 — 15.4secs

Available for 656 of 659 hourly samples

Typical Observed Wind

Variable, 16.9mph
Mean: 17.4 mph
P10–P90: 6 — 29.1 mph
Recorded extremes

0.8 — 44.7 mph

Circular concentration: 27%

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 659 hourly samples

Compared With Previous Octobers

Historical baseline from 10,367 observations across 15 years.

Wave Height
4.1ft
0.3ft below mean
Historical mean 4.364ft
Wave Period
5.1s
0.6s below mean
Historical mean 5.7s
Water Temperature
–
Not enough comparable data
Historical mean 14.3°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 Oct 2025Last observation shown
Metric
Mean significant wave height (ft)57910544332112111158443457659---
Mean maximum wave height (ft)81114169774531122221812664781210816---
Mean peak period (s)6687556443533333357854556578---
Mean zero-crossing period (s)4566444443433333345544455557---
Mean peak wave directionSSWconcentration 100%Sconcentration 99%SSWconcentration 92%WNWconcentration 88%WNWconcentration 98%SSWconcentration 81%Sconcentration 98%NWconcentration 94%WNWconcentration 97%WNWconcentration 88%NEconcentration 45%Variableconcentration 27%ENEconcentration 68%NEconcentration 37%NEconcentration 82%ENEconcentration 72%Econcentration 41%SEconcentration 90%SSEconcentration 93%SSEconcentration 92%WNWconcentration 83%WNWconcentration 47%Nconcentration 53%Wconcentration 52%Nconcentration 96%NNWconcentration 85%NWconcentration 48%WSWconcentration 50%---
Mean wave directionSSWconcentration 100%Sconcentration 99%SSWconcentration 92%WNWconcentration 90%WNWconcentration 97%SSWconcentration 88%SSWconcentration 97%NWconcentration 93%WNWconcentration 96%NWconcentration 67%Econcentration 63%Econcentration 41%Econcentration 70%ESEconcentration 36%ENEconcentration 75%ENEconcentration 76%ESEconcentration 43%SEconcentration 94%SEconcentration 93%SSEconcentration 88%WNWconcentration 91%Wconcentration 46%Nconcentration 52%Wconcentration 65%Nconcentration 97%NNWconcentration 87%NNWconcentration 64%SWconcentration 42%---
Mean directional spread (°)108.9106.7104.5126.6172.6162.8136.6194.2202.6224.6253.0252.6226.5243.1222.5208.2253.9141.7122.9123.6160.8202.7142.4139.7115.6132.0171.9197.0---
Mean wind directionSconcentration 99%Sconcentration 99%SSWconcentration 87%Wconcentration 96%Wconcentration 95%SSWconcentration 89%SWconcentration 77%WNWconcentration 94%Wconcentration 98%Wconcentration 98%NWconcentration 82%NEconcentration 92%SEconcentration 52%NEconcentration 77%NEconcentration 93%ENEconcentration 56%ESEconcentration 80%SEconcentration 99%SSEconcentration 91%Variableconcentration 16%Wconcentration 96%WSWconcentration 57%NWconcentration 74%WNWconcentration 73%NNWconcentration 98%WNWconcentration 92%WNWconcentration 91%WNWconcentration 99%---
Mean wind speed (mph)2327293423191815161168689782325132012222126231917---
Mean water temperature(°C)-------------------------------

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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