Bluegraph
SIMarineUS

Wave intelligence

The systems in the sea

A buoy's significant wave height sums everything in the sea: 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 partitioned into those systems, which are followed through time, used to place the storms the swells came from, and checked for seas that cross.

Stations analysed
162 of 164
Newest spectrum
46 min ago
Systems named
315
Swell · wind sea
218 · 97
Seas crossing
9 buoys
Storms, last month
223 placed →
Window
The last 4 days
Method
Reference

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

Each petal is a system, pointing to where it comes from, north up. Its length grows with height (the ring is 13 ft); its width is the directional spread. Swell Wind sea Storm placed

StationSystems nowSeas crossingStorm placed
Barbers Point, Kalaeloa, HI (238) 51212 · Hawaii · 1 h ago
  • Wind sea4.0 ft6 sSSW
  • Groundswell2.4 ft14 sS
Hilo, HI 51206 · Hawaii · 46 min ago
  • Wind sea4.7 ft9 sE
About 2550 mi to the NNW (327°T)
Mokapu Point, Oahu, HI 51202 · Hawaii · 46 min ago
  • Wind sea5.3 ft10 sE ↑ building
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 56 min ago
  • Wind sea9.2 ft8 sSE
About 900 mi to the S (180°T)
Northern Hawaii One 51000 · Hawaii · 1 h ago
  • Swell4.3 ft8 sE ↓ fading
  • Swell1.9 ft10 sW ↑ building
  • Groundswell1.6 ft14 sS new
  • +1 more
Northwestern Hawaii Two 51101 · Hawaii · 56 min ago
  • Swell6.7 ft8 sE ↓ fading
  • Swell6.1 ft7 sS ↑ building
90° apartAbout 1550 mi to the SSE (147°T)
Pauwela, Maui, HI 51205 · Hawaii · 46 min ago
  • Wind sea4.7 ft9 sENE
About 1700 mi to the NW (326°T)
Pearl Harbor Entrance, HI (233) 51211 · Hawaii · 1 h ago
  • Wind sea3.6 ft5 sSSE
  • Groundswell1.9 ft14 sSSE
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 1 h ago
  • Swell4.7 ft8 sE
  • Groundswell2.7 ft13 sS ↓ fading
  • Swell2.3 ft12 sN new
110° apartAbout 2400 mi to the NNW (339°T)
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 1 h ago
  • Groundswell3.9 ft13 sESE new
  • Swell2.8 ft9 sNW new
  • Wind sea1.2 ft4 sESE new
About 2350 mi to the NW (305°T)
Waimea Bay, HI 51201 · Hawaii · 46 min ago
  • Wind sea2.2 ft7 sN ↓ fading
  • Swell1.0 ft10 sNNE new
  • Swell1.0 ft11 sW
Western Hawaii 51003 · Hawaii · 56 min ago
  • Swell5.0 ft8 sWNW ↑ building
  • Wind sea4.7 ft6 sSE new
  • Swell3.0 ft13 sSSE
145° apart