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M2 wave buoy daily means for Jun 2025

Daily means from the M2 wave buoy for Jun 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

670 wave-buoy observations covered 29 of 30 days (97%). Typical wave height was 2.7 ft (10th–90th percentile 1.2–4.6 ft), while mean peak wave period was 4.7 seconds (10th–90th percentile 2.8–6.7 seconds). Typical wind was 13.8 mph (10th–90th percentile 6.4–22.1 mph) and mean water temperature was 13.6°C (10th–90th percentile 12.7–14.9°C). 4 of 4,020 checked values (0.1%) were excluded by quality control. Across 13 comparable years, mean wave height was above the same-month mean of 2.6 ft and mean wave period was below the same-month mean of 5 seconds.

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

Typical Significant Wave Height

2.7ft
Mean: 2.8 ft
P10–P90: 1.2 — 4.6 ft
Recorded extremes

0.4 — 7.3 ft

Mean Observed Wave Period

4.7secs
P10–P90: 2.8 — 6.7secs
Recorded extremes

2.5 — 15.4secs

Available for 666 of 670 hourly samples

Typical Observed Wind

SSW, 13.8mph
Mean: 14.2 mph
P10–P90: 6.4 — 22.1 mph
Recorded extremes

1.7 — 28.7 mph

Circular concentration: 59%

Mean Water Temperature

13.6°C
P10–P90: 12.7 — 14.9°C
Recorded extremes

12.2 — 16°C

Compared With Previous Junes

Historical baseline from 8,632 observations across 13 years.

Wave Height
2.8ft
0.2ft above mean
Historical mean 2.592ft
Wave Period
4.7s
0.3s below mean
Historical mean 5s
Water Temperature
13.6°C
1.5°C above mean
Historical mean 12.1°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 Jun 2025Last observation shown
Metric
Mean significant wave height (ft)4-4433233312432232112343335422
Mean maximum wave height (ft)7-7644455523643453222566458644
Mean peak period (s)5-6564444634664554383546546654
Mean zero-crossing period (s)4-4444444433444444343444444443
Mean peak wave directionSWconcentration 68%-SSWconcentration 82%SWconcentration 86%Sconcentration 96%Sconcentration 30%Wconcentration 82%Wconcentration 64%SWconcentration 77%SSWconcentration 32%SWconcentration 62%Econcentration 65%Sconcentration 98%Variableconcentration 20%SSWconcentration 74%SSWconcentration 75%Sconcentration 98%Variableconcentration 29%Variableconcentration 28%Variableconcentration 25%SSWconcentration 65%Sconcentration 95%Wconcentration 98%Sconcentration 94%SSWconcentration 82%SWconcentration 74%Sconcentration 99%Sconcentration 99%Sconcentration 97%SSWconcentration 90%
Mean wave directionSWconcentration 77%-SWconcentration 97%SWconcentration 92%Sconcentration 96%Sconcentration 35%WSWconcentration 85%Wconcentration 61%SWconcentration 91%SWconcentration 35%SSWconcentration 91%Econcentration 71%Sconcentration 98%ESEconcentration 32%SSWconcentration 88%Sconcentration 95%Sconcentration 99%ESEconcentration 37%SEconcentration 35%Variableconcentration 22%Sconcentration 68%SSWconcentration 96%WSWconcentration 98%SSWconcentration 97%SSWconcentration 93%SSWconcentration 81%Sconcentration 99%Sconcentration 99%Sconcentration 97%Sconcentration 97%
Mean directional spread (°)157.0-142.2182.0163.7180.5147.2165.8158.7191.5222.7206.0173.8134.1160.0179.5181.9222.3207.8179.9205.9171.9192.8158.4166.3209.3139.4144.5182.9206.6
Mean wind directionWSWconcentration 75%-WSWconcentration 96%SWconcentration 89%SWconcentration 76%WSWconcentration 72%WNWconcentration 86%WSWconcentration 82%SWconcentration 81%Wconcentration 48%SSEconcentration 83%ESEconcentration 80%SSEconcentration 94%Variableconcentration 18%SWconcentration 86%SSWconcentration 82%SSWconcentration 93%Variableconcentration 30%ESEconcentration 87%ESEconcentration 78%Sconcentration 97%SWconcentration 89%WSWconcentration 90%SWconcentration 97%SSWconcentration 79%SWconcentration 83%Sconcentration 98%SSWconcentration 94%Sconcentration 54%Sconcentration 95%
Mean wind speed (mph)18-17171114141418131111191212131768813181713151723161116
Mean water temperature(°C)12.9-12.812.813.013.013.012.812.812.913.113.112.913.013.313.513.814.315.015.315.314.514.014.213.513.613.813.913.814.0

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