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
41 min ago
Systems named
306
Swell · wind sea
199 · 107
Seas crossing
9 buoys
Storms, last month
203 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 4 m); its width is the directional spread. Swell Wind sea Storm placed

StationLargest systemDirectional spread
Southwest Pass Entrance W, LA 42084 · Gulf of Mexico · 1 h agoWind sea 7 s 35° moderate crests
West Tampa, FL 42036 · Gulf of Mexico · 1 h agoWind sea 6 s 35° moderate crests
Caribbean Valley 42060 · Caribbean and tropical Atlantic · 41 min agoWind sea 6 s 35° moderate crests
East Bahamas 41046 · Caribbean and tropical Atlantic · 41 min agoWind sea 6 s 35° moderate crests
San Francisco, CA 46026 · California · 51 min agoSwell 11 s 35° moderate crests
St Georges, CA 46027 · California · 1 h agoWind sea 7 s 35° moderate crests
Central Aleutians, AK 46072 · Alaska · 41 min agoSwell 8 s 35° moderate crests
Southwest Bering Sea, AK 46070 · Alaska · 41 min agoWind sea 10 s 35° moderate crests
W Gulf of Alaska 46001 · Alaska · 41 min agoWind sea 8 s 35° moderate crests
SE Hawaii - 200 NM SE of Hilo 51004 · Hawaii · 41 min agoSwell 8 s 35° moderate crests
Frying Pan Shoals, NC 41013 · Eastern Seaboard South · 41 min agoWind sea 4 s 36° moderate crests
NE Puerto Rico 41043 · Caribbean and tropical Atlantic · 1 h agoSwell 7 s 36° moderate crests
Columbia River Bar, OR 46029 · Pacific Northwest · 41 min agoSwell 12 s 36° moderate crests
Virginia Beach Offshore, VA 44088 · Eastern Seaboard North · 1 h agoSwell 10 s 37° moderate crests
Grand Island North, MI 45211 · Great Lakes · 1 h agoWind sea 3 s 37° moderate crests
Point Arena, CA 46014 · California · 1 h agoSwell 8 s 37° moderate crests
West Oregon 46002 · Pacific Northwest · 41 min agoSwell 10 s 37° moderate crests
Fairweather Ground, AK 46083 · Alaska · 41 min agoSwell 8 s 37° moderate crests
Mokapu Point, Oahu, HI 51202 · Hawaii · 1 h agoWind sea 8 s 37° moderate crests
Cape Canaveral Nearshore, FL 41113 · Eastern Seaboard South · 1 h agoWind sea 4 s 38° moderate crests