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
161 of 163
Newest spectrum
57 min ago
Systems named
309
Swell · wind sea
207 · 102
Seas crossing
3 buoys
Storms, last month
183 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 sea3.8 ft6 sS
  • Swell2.2 ft10 sW ↓ fading
  • Groundswell1.6 ft16 sS
  • +1 more
Hilo, HI 51206 · Hawaii · 1 h ago
  • Wind sea6.0 ft9 sE
  • Swell1.8 ft12 sNNW
About 2550 mi to the NW (326°T)
Mokapu Point, Oahu, HI 51202 · Hawaii · 1 h ago
  • Wind sea6.1 ft9 sENE
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 57 min ago
  • Swell11.7 ft10 sSE ↑ building
About 900 mi to the S (180°T)
Northern Hawaii One 51000 · Hawaii · 57 min ago
  • Swell6.0 ft9 sE new
  • Wind sea2.9 ft5 sESE ↓ fading
Northwestern Hawaii Two 51101 · Hawaii · 57 min ago
  • Wind sea11.6 ft9 sSE ↑ building
About 1500 mi to the SSE (152°T)
Pauwela, Maui, HI 51205 · Hawaii · 1 h ago
  • Wind sea6.2 ft9 sENE
About 2950 mi to the NW (325°T)
Pearl Harbor Entrance, HI (233) 51211 · Hawaii · 1 h ago
  • Wind sea3.6 ft6 sS
  • Groundswell1.9 ft15 sSSE ↑ building
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 57 min ago
  • Swell6.2 ft8 sENE
  • Swell3.4 ft13 sWNW
  • Swell3.1 ft13 sSE new
125° apartAbout 2500 mi to the N (354°T)
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 57 min ago
  • Swell3.6 ft8 sE new
  • Swell3.1 ft11 sWNW
  • Swell2.2 ft13 sSE ↓ fading
  • +1 more
Waimea Bay, HI 51201 · Hawaii · 1 h ago
  • Wind sea4.6 ft9 sNE ↑ building
  • Swell1.4 ft11 sW ↓ fading
Western Hawaii 51003 · Hawaii · 57 min ago
  • Swell4.7 ft9 sWNW ↓ fading
  • Wind sea4.6 ft6 sSSE ↑ building
  • Swell3.1 ft8 sE ↓ fading
  • +1 more
125° apart