Skip to content
Surfhog home
Menu

Fanø Bugt wave buoy daily means for Dec 2025

Daily means from the Fanø Bugt wave buoy for Dec 2025, 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

1,487 wave-buoy observations covered all 31 days. Typical wave height was 3.3 ft (10th–90th percentile 1.6–7.5 ft), while mean average wave period was 4.5 seconds (10th–90th percentile 3.2–5.8 seconds). All 4,461 checked values passed quality control. Across 15 comparable years, mean wave height was below the same-month mean of 4.2 ft and mean wave period was the same as the same-month mean of 4.5 seconds.

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

Typical Significant Wave Height

3.3ft
Mean: 4 ft
P10–P90: 1.6 — 7.5 ft
Recorded extremes

0.6 — 11.3 ft

Mean Observed Wave Period

4.5secs
P10–P90: 3.2 — 5.8secs
Recorded extremes

2.6 — 8.3secs

Typical Observed Wind

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

Available for 0 of 744 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 744 hourly samples

Compared With Previous Decembers

Historical baseline from 20,975 observations across 15 years.

Wave Height
4ft
0.2ft below mean
Historical mean 4.232ft
Wave Period
4.5s
In line with the historical mean
Historical mean 4.5s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Fanø Bugt. 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 Fanø Bugt wave buoy

Fanø Bugt is a Danish Coastal Authority directional buoy in the eastern North Sea southwest of Esbjerg. Its setting between the open sea, the island of Fanø and the approaches to the Wadden Sea represents conditions relevant to the harbour entrance, tidal inlets and the low-lying southwest Danish coast.

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

Metrics are rows; days run left to right.
Fanø Bugt wave buoy daily means Dec 2025Last observation shown
Metric
Mean significant wave height (ft)8732243746643874276423211133434
Mean average wave height (ft)-------------------------------
Mean maximum wave height (ft)121144365126101065131153109744321154647
Mean average period (s)5544444655554654455533335644444
Mean zero-crossing period (s)5543444545544554455533324544444
Mean maximum wave period (s)-------------------------------
Mean peak wave directionWSWconcentration 97%SWconcentration 99%WSWconcentration 98%WSWconcentration 99%SWconcentration 98%SWconcentration 98%SWconcentration 99%WSWconcentration 91%WSWconcentration 96%WSWconcentration 99%WSWconcentration 99%WSWconcentration 98%WSWconcentration 98%WSWconcentration 99%WSWconcentration 99%WSWconcentration 99%WSWconcentration 96%SWconcentration 99%WSWconcentration 97%Wconcentration 99%ESEconcentration 63%ESEconcentration 99%Econcentration 98%NEconcentration 78%WNWconcentration 85%WNWconcentration 99%WNWconcentration 98%WNWconcentration 99%WNWconcentration 99%WNWconcentration 99%WNWconcentration 99%

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 Danish Coastal Authority wave-measurement network.

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

› Wave Buoy List