Skip to content
Surfhog home
Menu

Fjaltring wave buoy daily means for Jul 2015

Daily means from the Fjaltring wave buoy for Jul 2015, 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

1,266 wave-buoy observations covered 27 of 31 days (87%). Typical wave height was 3.5 ft (10th–90th percentile 1.4–7.9 ft), while mean average wave period was 4.4 seconds (10th–90th percentile 3.4–5.7 seconds). All 3,797 checked values passed quality control. Across 5 comparable years, mean wave height was above the same-month mean of 3 ft and mean wave period was the same as the same-month mean of 4.4 seconds.

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

Typical Significant Wave Height

3.5ft
Mean: 4.1 ft
P10–P90: 1.4 — 7.9 ft
Recorded extremes

0.5 — 13.8 ft

Mean Observed Wave Period

4.4secs
P10–P90: 3.4 — 5.7secs
Recorded extremes

2.3 — 7.1secs

Typical Observed Wind

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

Available for 0 of 634 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 634 hourly samples

Compared With Previous Julys

Historical baseline from 7,274 observations across 5 years.

Wave Height
4.1ft
1.1ft above mean
Historical mean 3.018ft
Wave Period
4.4s
In line with the historical mean
Historical mean 4.4s
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 Jul 2015Last observation shown
Metric
Mean significant wave height (ft)12----36128212355255343433732467
Mean maximum wave height (ft)13----5102014424698498565856125481112
Mean average period (s)43----4575434455455444454554565
Mean zero-crossing period (s)33----4565433455445444444544465
Mean peak wave directionWNWconcentration 80%Sconcentration 96%----WSWconcentration 95%WSWconcentration 97%NWconcentration 99%NWconcentration 100%WNWconcentration 72%SWconcentration 97%SWconcentration 95%NWconcentration 94%NWconcentration 100%NNWconcentration 100%NWconcentration 63%SWconcentration 92%Wconcentration 100%WSWconcentration 98%SWconcentration 95%WSWconcentration 99%Wconcentration 99%Wconcentration 99%NNWconcentration 92%NWconcentration 99%Wconcentration 74%WSWconcentration 94%WSWconcentration 84%WNWconcentration 98%NWconcentration 100%

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