Skip to content
Surfhog home
Menu

Fanø Bugt wave buoy daily means for May 2021

Daily means from the Fanø Bugt wave buoy for May 2021, 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

1,485 wave-buoy observations covered all 31 days. Typical wave height was 2 ft (10th–90th percentile 0.9–5.1 ft), while mean average wave period was 3.7 seconds (10th–90th percentile 2.9–4.8 seconds). 1 of 4,455 checked values (0%) were excluded by quality control. Across 11 comparable years, mean wave height was above the same-month mean of 2.3 ft and mean wave period was above the same-month mean of 3.6 seconds.

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

Typical Significant Wave Height

2ft
Mean: 2.5 ft
P10–P90: 0.9 — 5.1 ft
Recorded extremes

0.5 — 8.5 ft

Available for 742 of 743 hourly samples

Mean Observed Wave Period

3.7secs
P10–P90: 2.9 — 4.8secs
Recorded extremes

2.4 — 5.8secs

Typical Observed Wind

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

Available for 0 of 743 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 743 hourly samples

Compared With Previous Mays

Historical baseline from 13,892 observations across 11 years.

Wave Height
2.5ft
0.2ft above mean
Historical mean 2.264ft
Wave Period
3.7s
0.1s above mean
Historical mean 3.6s
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 May 2021Last observation shown
Metric
Mean significant wave height (ft)1225554332211221111246532422221
Mean average wave height (ft)-------------------------------
Mean maximum wave height (ft)234999656432234112247101153744331
Mean average period (s)3335554444433343333345544443333
Mean zero-crossing period (s)3334554444433333333345543433333
Mean maximum wave period (s)-------------------------------
Mean peak wave directionSSEconcentration 58%WNWconcentration 82%Wconcentration 84%SSWconcentration 96%Wconcentration 96%Wconcentration 99%Wconcentration 99%WSWconcentration 82%SWconcentration 94%SWconcentration 94%WSWconcentration 100%Wconcentration 90%WNWconcentration 97%WNWconcentration 99%Wconcentration 99%NWconcentration 37%WSWconcentration 90%Wconcentration 99%Wconcentration 97%Wconcentration 95%SSWconcentration 90%SWconcentration 99%Wconcentration 98%SWconcentration 95%SWconcentration 98%WSWconcentration 98%WNWconcentration 88%WNWconcentration 99%WNWconcentration 100%NWconcentration 99%NWconcentration 97%

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