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
159 of 161
Newest spectrum
34 min ago
Systems named
306
Swell · wind sea
195 · 111
Seas crossing
20 buoys
Storms, last month
738 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
Barnegat, NJ (209) 44091 · Eastern Seaboard North · 1 h ago
  • Wind sea0.8 m9 sESE
Bethany Beach, DE 44084 · Eastern Seaboard North · 4 h ago
  • Wind sea0.8 m9 sE
Block Island, RI (154) 44097 · Eastern Seaboard North · 1 h ago
  • Wind sea0.7 m9 sSE
Boston, MA 44013 · Eastern Seaboard North · 44 min ago
  • Swell0.3 m10 sE ↓ fading
  • Swell0.3 m4 sENE new
  • Wind sea0.2 m2 sSSW new
About 350 nmi to the ENE (079°T)
Buzzards Bay, MA (260) 44085 · Eastern Seaboard North · 1 h ago
  • Wind sea0.5 m9 sSSE
Cape Cod Bay, MA (221) 44090 · Eastern Seaboard North · 1 h ago
  • Wind sea0.3 m2 sSSW new
Cape Henry, VA 44099 · Eastern Seaboard North · 34 min ago
  • Wind sea1.2 m8 sE new
Georges Bank, MA 44011 · Eastern Seaboard North · 44 min ago
  • Swell0.5 m5 sNNW ↓ fading
  • Swell0.5 m9 sESE
Jeffrey's Ledge, NH 44098 · Eastern Seaboard North · 1 h ago
  • Wind sea0.6 m10 sSE ↓ fading
Jonesport, ME 44027 · Eastern Seaboard North · 44 min ago
  • Wind sea1.0 m4 sWSW ↑ building
  • Swell0.3 m9 sS ↑ building
Long Island, NY 44025 · Eastern Seaboard North · 54 min ago
  • Swell0.6 m9 sESE new
  • Swell0.4 m4 sESE new
About 500 nmi to the ESE (107°T)
Nantucket Offshore, MA 44008 · Eastern Seaboard North · 44 min ago
  • Swell0.5 m10 sSE
  • Swell0.4 m6 sNE new
  • Swell0.2 m4 sE new
Nantucket Sound, MA 44020 · Eastern Seaboard North · 44 min ago
  • Swell0.2 m2 sE new
New York Harbor Entrance, NY 44065 · Eastern Seaboard North · 1 h ago
  • Swell0.6 m9 sESE ↑ building
About 4550 nmi to the ESE (108°T)
Portland, ME 44007 · Eastern Seaboard North · 44 min ago
  • Wind sea0.6 m4 sSW new
  • Swell0.4 m9 sSE ↑ building
About 350 nmi to the SE (135°T)
Thimble Shoal, VA 44087 · Eastern Seaboard North · 34 min ago
  • Wind sea0.4 m4 sESE new
Virginia Beach Offshore, VA 44088 · Eastern Seaboard North · 1 h ago
  • Wind sea1.5 m8 sE
About 1550 nmi to the ENE (076°T)
Virginia Beach, VA 44014 · Eastern Seaboard North · 44 min ago
  • Swell1.3 m7 sE new
  • Swell0.7 m9 sENE ↓ fading
East Lake Ontario 45012 · Great Lakes · 44 min ago
  • Swell0.1 m4 sE new
East Superior 45004 · Great Lakes · 44 min ago
  • Wind sea0.6 m3 sSE ↑ building