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
49 min ago
Systems named
301
Swell · wind sea
193 · 108
Seas crossing
7 buoys
Storms, last month
206 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 sea5.5 ft7 sS
  • Groundswell2.0 ft15 sS
About 1300 mi to the S (188°T)
Hilo, HI 51206 · Hawaii · 49 min ago
  • Wind sea5.1 ft8 sE
About 2550 mi to the NNW (327°T)
Mokapu Point, Oahu, HI 51202 · Hawaii · 1 h ago
  • Wind sea5.4 ft9 sE
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 59 min ago
  • Wind sea8.2 ft9 sESE ↓ fading
About 900 mi to the S (180°T)
Northern Hawaii One 51000 · Hawaii · 59 min ago
  • Swell4.4 ft8 sESE ↓ fading
  • Swell2.9 ft11 sNNE new
  • Swell2.3 ft12 sS
85° apart
Northwestern Hawaii Two 51101 · Hawaii · 59 min ago
  • Wind sea9.2 ft9 sESE ↓ fading
About 1700 mi to the SSE (154°T)
Pauwela, Maui, HI 51205 · Hawaii · 49 min ago
  • Wind sea4.9 ft9 sENE new
  • Swell2.0 ft11 sNNW ↓ fading
Pearl Harbor Entrance, HI (233) 51211 · Hawaii · 1 h ago
  • Wind sea4.4 ft7 sS ↓ fading
  • Groundswell1.8 ft15 sSSE
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 59 min ago
  • Swell5.4 ft9 sENE
  • Groundswell2.9 ft14 sSSW ↑ building
About 2650 mi to the N (354°T)
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 59 min ago
  • Swell3.4 ft8 sE ↓ fading
  • Groundswell3.2 ft13 sWNW new
  • Swell2.4 ft11 sSE ↑ building
About 2200 mi to the NW (306°T)
Waimea Bay, HI 51201 · Hawaii · 1 h ago
  • Wind sea3.5 ft8 sNNE ↑ building
  • Swell1.2 ft10 sNNW new
Western Hawaii 51003 · Hawaii · 59 min ago
  • Wind sea3.6 ft5 sSSW ↑ building
  • Groundswell3.2 ft14 sS
  • Swell3.1 ft6 sE ↓ fading
  • +1 more