Buoy 51000
Northern Hawaii One
Northeast offshore checkpoint
A deep-water buoy northeast of Oahu that can help track broader north and northeast swell energy moving through the Hawaiian chain.
Latest Snapshot
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Station Context
Region: Northeast of Honolulu
Station type: Deep-water offshore buoy
Position: 23.534°, 153.752°W
Distance to Hanalei Bay: 328.1 nautical miles
NDBC lists this station as 245 NM northeast of Honolulu. It is not as direct for Kauai as 51001, but it can still be useful for tracking larger-scale swell energy and seeing how events are evolving across the Hawaiian waters.
Historical Swell
Blue shows swell height over time. Hover points to see period and direction.
Historical swell chart unavailable for this buoy right now.
How to Use This Buoy
What to Watch
- Use it as an additional offshore checkpoint when you want a broader Hawaii-wide read, not just the direct Kauai lead buoy.
- Compare it with 51001 to see whether north or northeast energy is building more broadly before it focuses on Kauai.
- Watch how period and direction change here when trying to understand swell structure across multiple buoys.
How to Read It
- If 51000 is active while 51001 stays muted, that can hint at energy that is more northeast-leaning or less directly aligned for Kauai.
- This buoy is better for context and trend than for exact Kauai arrival timing.
- Pair it with 51001 and 51208 when you want the fullest offshore-to-nearshore picture for the north shore.
Swell Travel Time
Swell timing from this buoy uses the same deep-water group-speed and signed-distance method documented in the technical guide.
See the swell timing method