Reported Nov 13, 4:50 AM GMT-4Buoy 41044

NE St Martin - 330 NM NE St Martin Is

United States

Last wave reading:

Now at the buoy

Significant wave height at the buoy

4.3 ft

1.3 m

Dominant period
—
Direction
from NE 41°

Swell

3.6 ft1.1 m

9.1 sfrom NE 45°

Wind waves

2.3 ft0.7 m

4.8 sfrom SSE 158°

Short-period swell leads: 3.6 ft at 9.1 s from the NE, with 2.3 ft of wind waves at 4.8 s from the SSE on top. Holding steady over the last 6 hours.

Significant wave height is the average of the biggest third of waves at the buoy. It is not surf height at a beach.

Trend at the buoy

Height at the buoy

2 ft4 ft6 ft8 ft10 ft12 ft9 Mon10 Tue11 Wed12 Thu13 Fri
  • Total (significant height)
  • Swell
  • Wind waves

Period

5 s10 s15 s20 s9 Mon10 Tue11 Wed12 Thu13 Fri
  • Swell period
  • Wind-wave period
dir

Hourly means of the buoy's readings. Arrows point the way the waves travel.

Model vs the buoy

2 ft4 ft6 ft8 ft10 ft12 ftforecast
  • Buoy, hourly
  • Model, past days
  • Model forecast

Over the last 5 days, the model tracked the buoy within 10%.

Model peak each day at the buoy
DayHeightPeak periodFrom
Fri, Nov 134.6 ft9.6 sNE
Sat, Nov 144.1 ft9.1 sESE
Sun, Nov 153.9 ft8.8 sESE
Mon, Nov 165.8 ft9 sNNE
Tue, Nov 176.2 ft8.8 sNE
Wed, Nov 186.3 ft8.2 sNE
Thu, Nov 196.0 ft8.3 sENE

ECMWF WAM wave model via Open-Meteo, nearest model cell (21.500°N, 58.750°W). Both lines are significant wave height at sea, the same measure the buoy reports. Model output, not a Quiver beach forecast.

Other readings

Water temperature
85°F (29.3°C)
Wind
10 kt from the S, gusts 14 kt
Air temperature
83°F (28.3°C)
Pressure
1015.1 hPa

Reported Nov 13, 4:50 AM GMT-4.

How to read this buoy

Over the readings shown here, most wave energy reached this buoy from the NE and N.

Biggest hourly reading in that record: 10.7 ft at 7.5 s on Nov 8.

Station id
41044
Operator
NDBC
Program
NDBC Meteorological/Ocean
Position
21.582°N, 58.630°W
Type
Moored buoy
Local time zone
GMT-4 (open ocean)
Swell split
Yes, swell and wind waves reported

Source: NOAA National Data Buoy Center (NDBC). Licence: Public domain (US government work). Station page at the source.

Not for navigation. Readings can be late, missing or wrong; check official marine forecasts before going to sea.

Buoy terms

Significant height
The average of the biggest third of waves the buoy measured. Sets in the surf zone can be bigger or smaller.
Dominant period
Seconds between the waves carrying the most energy. Longer period means more power and more bend around points.
Swell vs wind waves
Swell was made by distant wind; wind waves were made nearby. The buoy splits its spectrum at a cutoff period to report each.
Direction
Where waves come from, in degrees true. 270° is from the west.