Bluegraph
SIMarineUS

Wave intelligence

The systems in the sea

A buoy's single wave height hides what the sea is made of: long groundswell from a storm a thousand miles off, a closer swell, the chop of the local wind. Each buoy's measured directional spectrum is taken apart into those systems, followed through time, and used to place the storms the swells came from and to flag seas that cross.

160 of 162 stations with directional spectra analysed from their latest spectrum and the four days before it.

The wave systems in each buoy's latest spectrum, largest first, and whether each is building or fading.

9 of 162 shown

StationSystems nowSeasStorms
Arecibo, PR 41121 · Caribbean and tropical Atlantic · spectrum 1 h ago
  • Swell 0.9 m · 12 s · N
  • Wind sea 0.6 m · 5 s · ENE fading
——
Caribbean Valley 42060 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Wind sea 1.1 m · 5 s · E building
  • Swell 0.5 m · 12 s · NE new
——
Central Caribbean 42058 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Wind sea 1.2 m · 6 s · ENE building
——
East Bahamas 41046 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 0.7 m · 11 s · N
  • Swell 0.6 m · 8 s · ESE
  • Swell 0.5 m · 6 s · WNW fading
  • +1 more
—About 600 nmi to the W (281°T)
NE Puerto Rico 41043 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 1.0 m · 12 s · N
  • Swell 0.6 m · 6 s · ESE new
  • Swell 0.5 m · 12 s · SSE new
  • +2 more
——
NE St Martin 41044 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 1.4 m · 12 s · NNW new
  • Swell 0.6 m · 7 s · ESE new
  • Swell 0.6 m · 6 s · ESE new
—About 1350 nmi to the SE (126°T)
North Equatorial One 41040 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 0.9 m · 10 s · NNE
  • Swell 0.8 m · 11 s · ESE building
  • Swell 0.6 m · 7 s · NE new
——
North Equatorial Two 41041 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 1.0 m · 12 s · NNE
  • Swell 0.7 m · 10 s · ESE fading
  • Swell 0.7 m · 5 s · E building
——
Western Caribbean 42057 · Caribbean and tropical Atlantic · spectrum 48 min ago
  • Swell 0.7 m · 6 s · SE new
  • Swell 0.5 m · 6 s · ENE fading
  • Swell 0.5 m · 5 s · ENE new
——