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 164
Newest spectrum
48 min ago
Systems named
333
Swell · wind sea
221 · 112
Seas crossing
1 buoy
Storms, last month
228 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
Southeast Bering Sea, AK 46073 · Alaska No spectrum in the last six hours
Southwest Bering Sea, AK 46070 · Alaska · 48 min ago
  • Wind sea10.2 ft9 sE
  • Swell5.5 ft10 sSSE
About 1350 mi to the SW (232°T)
W Aleutians (Amchitka), AK 46071 · Alaska · 48 min ago
  • Swell5.5 ft10 sS ↓ fading
  • Wind sea2.8 ft5 sE new
  • Swell2.5 ft8 sNE new
W Gulf of Alaska 46001 · Alaska · 48 min ago
  • Swell4.0 ft6 sWSW new
  • Groundswell1.6 ft15 sSSE
About 2350 mi to the WSW (243°T)
West Orca Bay, AK 46060 · Alaska · 48 min ago
  • Wind sea2.0 ft4 sENE new
  • Swell1.5 ft4 sS ↓ fading
  • Swell0.7 ft7 sSW ↓ fading
About 750 mi to the S (180°T)
Western Prince William Sound 46081 · Alaska · 1 h ago
  • Swell0.7 ft3 sESE new
Barbers Point, Kalaeloa, HI (238) 51212 · Hawaii · 1 h ago
  • Wind sea4.5 ft8 sSW new
  • Groundswell2.1 ft14 sS
Hilo, HI 51206 · Hawaii · 1 h ago
  • Wind sea4.4 ft8 sE
About 2550 mi to the NNW (327°T)
Mokapu Point, Oahu, HI 51202 · Hawaii · 1 h ago
  • Wind sea5.0 ft6 sE
NW Hawaii - 200 NM NW of Kauai 51001 · Hawaii · 48 min ago
  • Wind sea8.5 ft8 sSE ↑ building
  • Swell2.6 ft10 sNNW ↑ building
About 900 mi to the S (180°T)
Northern Hawaii One 51000 · Hawaii · 48 min ago
  • Swell4.7 ft10 sE
  • Swell1.6 ft12 sS ↓ fading
Northwestern Hawaii Two 51101 · Hawaii · 48 min ago
  • Wind sea7.6 ft8 sSE ↓ fading
  • Swell2.3 ft12 sSE new
  • Swell2.2 ft10 sNNW new
About 1500 mi to the SSE (152°T)
Pauwela, Maui, HI 51205 · Hawaii · 1 h ago
  • Wind sea4.4 ft10 sENE new
  • Swell1.3 ft10 sNNW new
About 1700 mi to the NW (326°T)
Pearl Harbor Entrance, HI (233) 51211 · Hawaii · 1 h ago
  • Wind sea3.4 ft6 sSSE
  • Groundswell1.9 ft14 sSSE
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 48 min ago
  • Swell5.3 ft8 sENE ↑ building
About 2600 mi to the NNW (346°T)
SW Hawaii - 200 NM SW of Kona 51002 · Hawaii · 1 h ago
  • Swell3.4 ft13 sESE
  • Swell2.5 ft10 sNW new
  • Wind sea1.6 ft5 sE ↓ fading
  • +1 more
About 2350 mi to the WNW (304°T)
Waimea Bay, HI 51201 · Hawaii · 1 h ago
  • Wind sea2.9 ft8 sNNW
Western Hawaii 51003 · Hawaii · 48 min ago
  • Swell3.2 ft5 sSSW new
  • Swell3.0 ft6 sESE new
  • Swell2.9 ft13 sSSE ↑ building
  • +1 more
Aunuu, American Samoa 51209 · Pacific islands · 1 h ago
  • Wind sea10.0 ft10 sSE
King-Poloa, American Samoa 51214 · Pacific islands · 1 h ago
  • Wind sea7.0 ft8 sSSE