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M2 wave buoy daily means for Jul 2026

Daily means from the M2 wave buoy for Jul 2026, 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

742 wave-buoy observations covered all 31 days. Typical wave height was 2.3 ft (10th–90th percentile 1.2–3.8 ft), while mean peak wave period was 4.3 seconds (10th–90th percentile 2.9–5.5 seconds). Typical wind was 12.8 mph (10th–90th percentile 5.4–20 mph) and mean water temperature was 14.9°C (10th–90th percentile 13.6–16.5°C). 1 of 4,452 checked values (0%) were excluded by quality control. Across 14 comparable years, mean wave height was above the same-month mean of 2.4 ft and mean wave period was below the same-month mean of 4.8 seconds.

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

Typical Significant Wave Height

2.3ft
Mean: 2.5 ft
P10–P90: 1.2 — 3.8 ft
Recorded extremes

0.4 — 6.9 ft

Mean Observed Wave Period

4.3secs
P10–P90: 2.9 — 5.5secs
Recorded extremes

2.5 — 15.4secs

Available for 741 of 742 hourly samples

Typical Observed Wind

Variable, 12.8mph
Mean: 13 mph
P10–P90: 5.4 — 20 mph
Recorded extremes

1.6 — 31.7 mph

Circular concentration: 24%

Mean Water Temperature

14.9°C
P10–P90: 13.6 — 16.5°C
Recorded extremes

12.9 — 18°C

Compared With Previous Julys

Historical baseline from 9,800 observations across 14 years.

Wave Height
2.5ft
0.1ft above mean
Historical mean 2.428ft
Wave Period
4.3s
0.5s below mean
Historical mean 4.8s
Water Temperature
14.9°C
0.9°C above mean
Historical mean 14°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 Jul 2026Last observation shown
Metric
Mean significant wave height (ft)3423223121333321132334323434322
Mean maximum wave height (ft)5744344232566542254446434646433
Mean peak period (s)4544454334555544554555534545433
Mean zero-crossing period (s)4443343333444443344444433444433
Mean peak wave directionWconcentration 53%WNWconcentration 36%WSWconcentration 42%Wconcentration 87%WSWconcentration 66%Sconcentration 98%SWconcentration 76%SSEconcentration 66%SWconcentration 53%Nconcentration 69%NNEconcentration 99%NEconcentration 89%NEconcentration 85%NNEconcentration 86%NEconcentration 86%NEconcentration 78%NEconcentration 56%Nconcentration 94%Nconcentration 85%Nconcentration 93%NNEconcentration 97%NNEconcentration 99%NNEconcentration 97%NNWconcentration 46%Wconcentration 93%NWconcentration 91%Wconcentration 33%Sconcentration 98%Sconcentration 99%Wconcentration 66%Wconcentration 85%
Mean wave directionWSWconcentration 71%WNWconcentration 42%SWconcentration 52%WSWconcentration 92%SWconcentration 75%Sconcentration 94%WSWconcentration 78%SSEconcentration 81%SSWconcentration 68%NNEconcentration 60%NNEconcentration 100%NEconcentration 95%NEconcentration 88%NNEconcentration 90%NEconcentration 90%NEconcentration 81%NEconcentration 66%NNEconcentration 96%Nconcentration 85%Nconcentration 93%Nconcentration 97%Nconcentration 99%NNEconcentration 99%NNWconcentration 50%Wconcentration 91%NWconcentration 96%Wconcentration 48%Sconcentration 98%Sconcentration 98%Wconcentration 73%Wconcentration 83%
Mean directional spread (°)175.8193.6189.3177.9179.8187.2186.2211.9198.3186.9189.1194.2186.2205.4178.2202.6206.8185.3181.8186.6189.2182.6188.2178.6157.3196.9192.4162.2194.8206.1190.7
Mean wind directionWSWconcentration 60%Wconcentration 89%SWconcentration 79%WSWconcentration 95%SWconcentration 86%SWconcentration 75%SWconcentration 68%SSWconcentration 43%WNWconcentration 37%NNEconcentration 98%Nconcentration 99%ENEconcentration 96%NEconcentration 93%NEconcentration 95%NEconcentration 91%NNEconcentration 86%NNWconcentration 88%Nconcentration 95%Nconcentration 99%NNEconcentration 92%Nconcentration 92%Nconcentration 98%NNEconcentration 73%WSWconcentration 58%WSWconcentration 97%Wconcentration 96%SWconcentration 81%Sconcentration 98%SSWconcentration 74%WSWconcentration 53%WSWconcentration 64%
Mean wind speed (mph)171814151010167812171819161387109101015101117211419121012
Mean water temperature(°C)14.414.314.314.314.615.315.416.015.915.815.114.614.614.213.913.413.513.614.014.315.415.917.017.216.515.214.814.815.114.814.8

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