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 162
Newest spectrum
36 min ago
Systems named
301
Swell · wind sea
198 · 103
Seas crossing
11 buoys
Storms, last month
171 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 4 m); its width is the directional spread. Swell Wind sea Storm placed

StationSystems nowSeas crossingStorm placed
Albatross Bank, AK 46078 · Alaska · 46 min ago
  • Wind sea2.2 m8 sW
Cape Cleare, AK 46076 · Alaska · 46 min ago
  • Swell1.1 m9 sS ↑ building
Cape Edgecumbe, AK 46084 · Alaska · 46 min ago
  • Swell2.4 m10 sWSW
  • Swell0.8 m7 sSE
About 700 nmi to the WSW (245°T)
Cape Suckling, AK 46082 · Alaska · 46 min ago
  • Swell1.2 m10 sSSW ↓ fading
  • Swell0.4 m6 sESE ↓ fading
  • Swell0.4 m4 sE new
  • +1 more
Central Aleutians, AK 46072 · Alaska · 46 min ago
  • Swell0.8 m8 sWSW
  • Swell0.5 m8 sNNE ↓ fading
  • Groundswell0.2 m16 sSW new
About 300 nmi to the NNW (331°T)
Central Bering Sea, AK Offshore 46035 · Alaska · 46 min ago
  • Swell1.1 m6 sWSW ↓ fading
  • Wind sea0.7 m4 sW new
Central Gulf of Alaska 46085 · Alaska · 46 min ago
  • Swell2.5 m8 sW
  • Wind sea1.3 m6 sWSW new
About 750 nmi to the WSW (244°T)
Fairweather Ground, AK 46083 · Alaska · 46 min ago
  • Swell1.4 m12 sWSW ↓ fading
  • Swell1.4 m8 sSSW new
  • Wind sea0.9 m5 sE
About 400 nmi to the WSW (244°T)
Lower Cook Inlet, AK 46108 · Alaska · 36 min ago
  • Wind sea0.7 m5 sSW ↓ fading
Portlock Bank, AK 46080 · Alaska · 46 min ago
  • Wind sea1.7 m7 sNW ↑ building
  • Swell1.1 m8 sSSW new
115° apart
Seal Rocks, AK 46061 · Alaska · 46 min ago
  • Swell0.7 m8 sSSW new
  • Swell0.6 m6 sSE ↑ building
Shelikof Strait, AK 46077 · Alaska · 46 min ago
  • Swell1.1 m6 sSW
Shumagin Islands, AK 46075 · Alaska · 46 min ago
  • Wind sea1.6 m7 sW ↑ building
  • Groundswell0.4 m17 sSE new
About 2300 nmi to the WSW (244°T)
South Kodiak, AK 46066 · Alaska · 46 min ago
  • Wind sea2.4 m8 sWNW ↑ building
Southeast Bering Sea, AK 46073 · Alaska No spectrum in the last six hours
Southwest Bering Sea, AK 46070 · Alaska · 46 min ago
  • Swell0.5 m6 sNW ↓ fading
  • Swell0.5 m4 sSW new
  • Swell0.3 m7 sSW
  • +2 more
W Aleutians (Amchitka), AK 46071 · Alaska · 46 min ago
  • Swell0.8 m8 sW
  • Swell0.5 m12 sSSE ↑ building
  • Wind sea0.3 m5 sSSW new
W Gulf of Alaska 46001 · Alaska · 46 min ago
  • Swell2.0 m10 sWSW ↑ building
  • Swell0.9 m6 sNNW ↓ fading
West Orca Bay, AK 46060 · Alaska · 46 min ago
  • Swell0.3 m8 sS new
Western Prince William Sound 46081 · Alaska · 46 min agoCalm: no wave system large enough to name