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M2 wave buoy daily means for Jan 2016

Daily means from the M2 wave buoy for Jan 2016, 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

726 wave-buoy observations covered all 31 days. Typical wave height was 5.6 ft (10th–90th percentile 2.6–9.2 ft), while mean peak wave period was 6.9 seconds (10th–90th percentile 4.5–10.2 seconds). Typical wind was 21 mph (10th–90th percentile 9.8–30 mph) and mean water temperature was 10.7°C (10th–90th percentile 9.9–11.5°C). 5 of 4,345 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was above the same-month mean of 5.3 ft and mean wave period was above the same-month mean of 5.6 seconds.

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

Typical Significant Wave Height

5.6ft
Mean: 5.8 ft
P10–P90: 2.6 — 9.2 ft
Recorded extremes

1.4 — 16.4 ft

Available for 722 of 726 hourly samples

Mean Observed Wave Period

6.9secs
P10–P90: 4.5 — 10.2secs
Recorded extremes

2.7 — 16.5secs

Available for 722 of 726 hourly samples

Typical Observed Wind

SW, 21mph
Mean: 20.5 mph
P10–P90: 9.8 — 30 mph
Recorded extremes

0.5 — 44.5 mph

Circular concentration: 50%

Available for 721 of 726 hourly samples

Mean Water Temperature

10.7°C
P10–P90: 9.9 — 11.5°C
Recorded extremes

9.5 — 11.6°C

Available for 723 of 726 hourly samples

Compared With Previous Januarys

Historical baseline from 3,659 observations across 5 years.

Wave Height
5.8ft
0.5ft above mean
Historical mean 5.315ft
Wave Period
6.9s
1.3s above mean
Historical mean 5.6s
Water Temperature
10.7°C
1.2°C above mean
Historical mean 9.5°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 2016Last observation shown
Metric
Mean significant wave height (ft)88654385364846633633856681187875
Mean maximum wave height (ft)121197651174861268835944128991116121013107
Mean peak period (s)8118126467788655545810677677987756
Mean zero-crossing period (s)5656545555554544455455556665655
Mean peak wave directionSSEconcentration 93%SSEconcentration 91%Sconcentration 98%Sconcentration 99%NEconcentration 90%Variableconcentration 17%SWconcentration 69%Sconcentration 81%SSEconcentration 80%SWconcentration 52%SSWconcentration 48%NWconcentration 99%SWconcentration 66%NNWconcentration 81%NWconcentration 97%WNWconcentration 55%SSEconcentration 39%Sconcentration 98%Sconcentration 100%Sconcentration 99%Sconcentration 99%Sconcentration 96%Sconcentration 99%Sconcentration 100%Sconcentration 100%Sconcentration 100%SSWconcentration 63%Sconcentration 93%SSWconcentration 86%WSWconcentration 90%SSWconcentration 90%
Mean wave directionSSEconcentration 95%SEconcentration 96%Sconcentration 97%SSEconcentration 97%ENEconcentration 85%Variableconcentration 17%SWconcentration 71%Sconcentration 83%SSEconcentration 95%SWconcentration 67%SSWconcentration 61%NWconcentration 99%SWconcentration 68%NWconcentration 82%NWconcentration 98%WNWconcentration 64%SEconcentration 40%SSEconcentration 99%Sconcentration 100%SSEconcentration 100%SSEconcentration 100%Sconcentration 99%Sconcentration 99%Sconcentration 100%Sconcentration 98%Sconcentration 100%SSWconcentration 81%SSWconcentration 96%SSWconcentration 98%SWconcentration 96%SSWconcentration 96%
Mean directional spread (°)22.925.523.123.637.030.123.428.027.830.920.722.129.425.926.335.729.220.317.523.818.924.320.418.819.921.623.019.224.028.224.6
Mean wind directionSSEconcentration 83%Econcentration 37%Sconcentration 83%SSEconcentration 84%NEconcentration 77%Variableconcentration 22%WSWconcentration 73%SWconcentration 70%SSEconcentration 41%WSWconcentration 92%Wconcentration 81%WNWconcentration 97%WSWconcentration 87%NWconcentration 94%NWconcentration 98%Wconcentration 88%SSEconcentration 46%SSEconcentration 97%SSWconcentration 80%SSEconcentration 99%SSEconcentration 99%SWconcentration 98%Sconcentration 95%Sconcentration 99%SSWconcentration 82%SSWconcentration 86%WSWconcentration 79%SWconcentration 94%SWconcentration 95%Wconcentration 97%SWconcentration 94%
Mean wind speed (mph)2616211415182515112318302023251315166162820222526292626262619
Mean water temperature(°C)11.511.511.511.511.411.511.511.311.011.010.911.010.910.910.910.810.610.410.410.410.310.410.110.010.210.510.410.310.29.89.6

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