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Fjaltring wave buoy daily means for May 2017

Daily means from the Fjaltring wave buoy for May 2017, 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

1,452 wave-buoy observations covered all 31 days. Typical wave height was 2 ft (10th–90th percentile 1–4.2 ft), while mean average of more than one wave period type was 3.9 seconds (10th–90th percentile 3–4.6 seconds). All 4,354 checked values passed quality control. Across 7 comparable years, mean wave height was below the same-month mean of 3.2 ft and mean wave period was below the same-month mean of 4.6 seconds.

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

Typical Significant Wave Height

2ft
Mean: 2.4 ft
P10–P90: 1 — 4.2 ft
Recorded extremes

0.5 — 10.8 ft

Mean Observed Wave Period

3.9secs
P10–P90: 3 — 4.6secs
Recorded extremes

2.3 — 6.2secs

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Available for 0 of 727 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 727 hourly samples

Compared With Previous Mays

Historical baseline from 8,887 observations across 7 years.

Wave Height
2.4ft
0.8ft below mean
Historical mean 3.248ft
Wave Period
3.9s
0.7s below mean
Historical mean 4.6s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Fjaltring. 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 Fjaltring wave buoy

Fjaltring is a Danish Coastal Authority directional buoy off the exposed central west coast of Jutland. The authority has maintained a continuous wave-measurement programme here since 1980, creating a key reference for Denmark's most erosion-prone coast and the long-running Lodbjerg–Nymindegab protection works.

Its current data source reports wave height, wave period and wave direction.

Metrics are rows; days run left to right.
Fjaltring wave buoy daily means May 2017Last observation shown
Metric
Mean significant wave height (ft)221221244322212322232125431342QC rejected
Mean maximum wave height (ft)33233236653332363435423985256414
Mean average period (s)3333344454434434434444354443545
Mean zero-crossing period (s)3333344454434434434444344443445
Mean peak wave directionVariableconcentration 12%NNEconcentration 86%Nconcentration 89%Nconcentration 92%Nconcentration 94%NWconcentration 96%NWconcentration 98%NNWconcentration 95%NWconcentration 100%WNWconcentration 99%Wconcentration 96%NNEconcentration 47%NWconcentration 42%NNWconcentration 89%SWconcentration 97%SWconcentration 99%SWconcentration 100%SWconcentration 81%NWconcentration 97%WSWconcentration 89%WSWconcentration 99%SWconcentration 100%WSWconcentration 66%NWconcentration 95%NWconcentration 99%NWconcentration 100%NWconcentration 94%SSWconcentration 92%Wconcentration 93%NWconcentration 97%WNWconcentration 96%

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.

Observation data source

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

› Wave Buoy List