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
40 min ago
Systems named
303
Swell · wind sea
202 · 101
Seas crossing
5 buoys
Storms, last month
209 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 · 50 min ago
  • Swell1.4 m7 sWSW ↓ fading
  • Groundswell0.5 m14 sSSE
About 1900 nmi to the WSW (240°T)
Cape Cleare, AK 46076 · Alaska · 1 h ago
  • Swell1.5 m8 sSSW ↑ building
  • Wind sea0.5 m4 sSW
Cape Edgecumbe, AK 46084 · Alaska · 50 min ago
  • Swell2.3 m8 sWSW ↑ building
About 700 nmi to the WSW (245°T)
Cape Suckling, AK 46082 · Alaska · 1 h ago
  • Wind sea1.7 m6 sSSW ↑ building
About 2500 nmi to the SSW (214°T)
Central Aleutians, AK 46072 · Alaska · 1 h ago
  • Wind sea3.5 m8 sE ↑ building
  • Swell3.0 m10 sSSW
105° apartAbout 4050 nmi to the S (171°T)
Central Bering Sea, AK Offshore 46035 · Alaska · 1 h ago
  • Wind sea2.5 m8 sE
Central Gulf of Alaska 46085 · Alaska · 1 h ago
  • Swell1.6 m8 sW ↓ fading
  • Wind sea1.3 m6 sSW new
  • Swell0.6 m8 sNNW new
Fairweather Ground, AK 46083 · Alaska · 1 h ago
  • Wind sea1.9 m7 sSW ↑ building
About 400 nmi to the WSW (244°T)
Lower Cook Inlet, AK 46108 · Alaska · 1 h ago
  • Wind sea1.2 m6 sSW
Portlock Bank, AK 46080 · Alaska · 1 h ago
  • Swell1.0 m7 sSSW ↓ fading
  • Swell0.9 m7 sNW new
About 1900 nmi to the SSW (209°T)
Seal Rocks, AK 46061 · Alaska · 1 h ago
  • Swell0.6 m8 sSSW
  • Swell0.4 m6 sSE new
  • Groundswell0.2 m16 sS new
Shelikof Strait, AK 46077 · Alaska · 50 min ago
  • Wind sea0.7 m5 sSSW ↓ fading
Shumagin Islands, AK 46075 · Alaska · 50 min ago
  • Swell0.7 m6 sWSW ↓ fading
  • Swell0.4 m5 sSW new
  • Groundswell0.3 m15 sESE ↑ building
  • +1 more
South Kodiak, AK 46066 · Alaska · 1 h ago
  • Swell1.0 m7 sWNW
  • Groundswell0.6 m14 sSSE new
  • Wind sea0.6 m4 sWSW new
Southeast Bering Sea, AK 46073 · Alaska No spectrum in the last six hours
Southwest Bering Sea, AK 46070 · Alaska · 50 min ago
  • Wind sea4.9 m11 sENE
  • Swell2.8 m10 sS new
90° apart
W Aleutians (Amchitka), AK 46071 · Alaska · 50 min ago
  • Swell3.0 m11 sSSW
W Gulf of Alaska 46001 · Alaska · 1 h ago
  • Wind sea2.0 m7 sWSW
About 2500 nmi to the WSW (238°T)
West Orca Bay, AK 46060 · Alaska · 1 h ago
  • Wind sea0.5 m4 sENE ↓ fading
  • Swell0.3 m7 sS ↑ building
Western Prince William Sound 46081 · Alaska · 1 h agoCalm: no wave system large enough to name