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
46 min ago
Systems named
315
Swell · wind sea
218 · 97
Seas crossing
9 buoys
Storms, last month
223 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
Albatross Bank, AK 46078 · Alaska · 56 min ago
  • Swell3.1 ft7 sSW ↓ fading
  • Groundswell1.4 ft14 sSSE ↓ fading
  • Swell1.0 ft4 sWSW new
About 2050 mi to the WSW (241°T)
Cape Cleare, AK 46076 · Alaska · 56 min ago
  • Wind sea5.1 ft5 sWSW new
  • Swell1.2 ft12 sS new
Cape Edgecumbe, AK 46084 · Alaska · 56 min ago
  • Swell5.8 ft8 sWSW ↓ fading
  • Groundswell1.4 ft15 sSSW new
About 750 mi to the WSW (238°T)
Cape Suckling, AK 46082 · Alaska · 56 min ago
  • Swell6.0 ft8 sSW
About 2800 mi to the SW (214°T)
Central Aleutians, AK 46072 · Alaska · 56 min ago
  • Wind sea9.7 ft9 sNE ↓ fading
  • Swell8.5 ft11 sS
145° apart
Central Bering Sea, AK Offshore 46035 · Alaska · 56 min ago
  • Wind sea10.7 ft8 sE
Central Gulf of Alaska 46085 · Alaska · 56 min ago
  • Swell4.9 ft8 sW ↓ fading
  • Wind sea3.4 ft5 sWSW new
  • Swell1.6 ft13 sS new
Fairweather Ground, AK 46083 · Alaska · 56 min ago
  • Swell6.0 ft8 sWSW
  • Swell1.6 ft4 sWSW new
About 450 mi to the WSW (244°T)
Lower Cook Inlet, AK 46108 · Alaska · 1 h ago
  • Wind sea4.2 ft6 sWSW ↓ fading
Portlock Bank, AK 46080 · Alaska · 1 h ago
  • Swell3.9 ft7 sNNW
  • Swell3.6 ft8 sSW ↑ building
  • Groundswell1.3 ft15 sSE new
105° apartAbout 2200 mi to the SSW (209°T)
Seal Rocks, AK 46061 · Alaska · 56 min ago
  • Wind sea3.4 ft8 sS
Shelikof Strait, AK 46077 · Alaska · 56 min ago
  • Wind sea1.6 ft4 sSW ↓ fading
Shumagin Islands, AK 46075 · Alaska · 56 min ago
  • Wind sea2.2 ft4 sESE new
  • Groundswell1.7 ft14 sSSE ↑ building
  • Swell1.1 ft5 sSW ↓ fading
South Kodiak, AK 46066 · Alaska · 56 min ago
  • Swell3.0 ft6 sW ↓ fading
  • Groundswell1.2 ft14 sSW new
  • Groundswell1.0 ft13 sESE ↓ fading
Southeast Bering Sea, AK 46073 · Alaska No spectrum in the last six hours
Southwest Bering Sea, AK 46070 · Alaska · 56 min ago
  • Wind sea15.7 ft10 sE
W Aleutians (Amchitka), AK 46071 · Alaska · 56 min ago
  • Swell8.2 ft10 sSSW
About 700 mi to the S (181°T)
W Gulf of Alaska 46001 · Alaska · 56 min ago
  • Swell5.4 ft8 sWSW
  • Groundswell1.3 ft15 sS new
About 2400 mi to the WSW (241°T)
West Orca Bay, AK 46060 · Alaska · 56 min ago
  • Swell1.9 ft8 sS
  • Wind sea1.3 ft3 sE new
  • Swell0.7 ft7 sNE new
Western Prince William Sound 46081 · Alaska · 1 h ago
  • Wind sea0.8 ft3 sENE new