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Fjaltring wave buoy daily means for Sep 2013

Daily means from the Fjaltring wave buoy for Sep 2013, 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

1,436 wave-buoy observations covered all 30 days. Typical wave height was 2.9 ft (10th–90th percentile 1.1–6.8 ft), while mean average of more than one wave period type was 4.9 seconds (10th–90th percentile 3.5–6 seconds). 5 of 4,045 checked values (0.1%) were excluded by quality control. Across 3 comparable years, mean wave height was below the same-month mean of 4.6 ft and mean wave period was above the same-month mean of 4.7 seconds.

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

Typical Significant Wave Height

2.9ft
Mean: 3.5 ft
P10–P90: 1.1 — 6.8 ft
Recorded extremes

0.7 — 9.7 ft

Mean Observed Wave Period

4.9secs
P10–P90: 3.5 — 6secs
Recorded extremes

2.5 — 18.5secs

Available for 717 of 718 hourly samples

Typical Observed Wind

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

Available for 0 of 718 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 718 hourly samples

Compared With Previous Septembers

Historical baseline from 4,281 observations across 3 years.

Wave Height
3.5ft
1.1ft below mean
Historical mean 4.626ft
Wave Period
4.9s
0.2s above mean
Historical mean 4.7s
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 Sep 2013Last observation shown
Metric
Mean significant wave height (ft)QC rejectedQC rejectedQC rejected322223432137764333664223111
Mean maximum wave height (ft)13151043434566326111110765611116345322
Mean average period (s)665544544564576666554555444433
Mean zero-crossing period (s)565543434454445556554554434333
Mean peak wave directionWNWconcentration 100%WNWconcentration 100%WNWconcentration 99%WNWconcentration 99%WNWconcentration 89%SSWconcentration 93%WNWconcentration 77%Wconcentration 80%WNWconcentration 93%WNWconcentration 98%NWconcentration 99%NWconcentration 98%NWconcentration 100%Wconcentration 84%WNWconcentration 86%WSWconcentration 99%Wconcentration 97%WNWconcentration 98%NWconcentration 99%Wconcentration 95%Wconcentration 96%Wconcentration 97%WNWconcentration 99%NWconcentration 100%Wconcentration 59%WNWconcentration 60%NWconcentration 99%NNWconcentration 97%Variableconcentration 23%Wconcentration 65%

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