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
40 min ago
Systems named
309
Swell · wind sea
199 · 110
Seas crossing
7 buoys
Storms, last month
177 placed →
Window
The last 4 days
Method
Reference

Every buoy by how orderly its largest system is: a narrow directional spread means long crests, as in groundswell; a wide one, short, confused seas.

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

StationLargest systemDirectional spread
South Bermuda 41049 · Eastern Seaboard South · 50 min agoGroundswell 15 s 26° moderate crests
Grays Reef, GA 41008 · Eastern Seaboard South · 1 h agoSwell 4 s 27° moderate crests
Hollywood Beach, FL (265) 41122 · Eastern Seaboard South · 1 h agoWind sea 3 s 29° moderate crests
Canaveral East, FL 41010 · Eastern Seaboard South · 50 min agoSwell 10 s 30° moderate crests
Oregon Inlet, NC 44095 · Eastern Seaboard South · 40 min agoSwell 9 s 31° moderate crests
Duck FRF, NC 44056 · Eastern Seaboard South · 40 min agoWind sea 9 s 36° moderate crests
Masonboro Inlet, ILM2, NC (150) 41110 · Eastern Seaboard South · 40 min agoWind sea 10 s 36° moderate crests
Frying Pan Shoals, NC 41013 · Eastern Seaboard South · 50 min agoSwell 9 s 38° moderate crests
Cape Canaveral Nearshore, FL 41113 · Eastern Seaboard South · 40 min agoWind sea 10 s 39° moderate crests
Duck FRF 26 m, NC 44100 · Eastern Seaboard South · 40 min agoWind sea 8 s 39° moderate crests
Fernandina Beach, FL Offshore 41112 · Eastern Seaboard South · 40 min agoWind sea 9 s 39° moderate crests
Diamond Shoals, NC 41025 · Eastern Seaboard South · 50 min agoSwell 9 s 42° short, confused crests
Edisto, SC 41004 · Eastern Seaboard South · 1 h agoSwell 9 s 42° short, confused crests
Onslow Bay Outer, NC (217) 41159 · Eastern Seaboard South · 1 h agoWind sea 10 s 43° short, confused crests
St. Augustine, FL (194) 41117 · Eastern Seaboard South · 1 h agoWind sea 9 s 43° short, confused crests
Nags Head, NC 44086 · Eastern Seaboard South · 40 min agoWind sea 9 s 44° short, confused crests
South Hatteras 41002 · Eastern Seaboard South · 50 min agoSwell 6 s 51° short, confused crests
Fort Pierce, FL (134) 41114 · Eastern Seaboard South · 40 min agoWind sea 10 s 52° short, confused crests
NE BAHAMAS - 350 NM ENE of Nassau, Bahamas 41047 · Eastern Seaboard South · 50 min agoSwell 7 s 56° short, confused crests
Cape Hatteras East, NC (250) 41120 · Eastern Seaboard South · 40 min agoWind sea 10 s 57° short, confused crests