Pacific Northwest
Greenhead Slough
Washington · NOAA station 9440650 · Tide predictions
46.3722, -123.9503
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
The next seven days
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H = high tide · L = low tide · highs & lows in local time
On the water nearby
Clatsop Spit, OR (162) buoy · 14 mi SW · Station 46243
Wind & wave reports →
Nearby tide stations
- Naselle River, swing bridge · 4.6 mi NE
- Naselle River, 4 miles above swing bridge · 5.4 mi E
- Ilwaco, Baker Bay, Wash. · 6.4 mi SW
- Paradise Point, Long Island · 6.6 mi N
- Chinook, Baker Bay, Wash. · 6.9 mi S
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 12.5 ft — Fri Jan 22 · 1:29 PM
Lowest predicted low tide: -2.3 ft — Mon Jul 5 · 9:49 AM
Biggest single-day swing: 13.8 ft on Sun Jun 6
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Mon Jul 5 | 9:49 AM | -2.3 ft |
| Tue Jul 6 | 10:36 AM | -2.1 ft |
| Sun Jun 6 | 10:08 AM | -2.1 ft |
| Sun Jul 4 | 9:00 AM | -2.1 ft |
| Mon Jun 7 | 10:57 AM | -2.0 ft |
| Sat Jun 5 | 9:20 AM | -2.0 ft |
| Tue Aug 3 | 9:26 AM | -1.9 ft |
| Mon Aug 2 | 8:39 AM | -1.8 ft |
| Wed Jul 7 | 11:23 AM | -1.7 ft |
| Sat Jul 3 | 8:10 AM | -1.7 ft |
121 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
About this station
Greenhead Slough is one of NOAA's reference tide stations — its predictions are computed directly from harmonic analysis of water levels observed here, and other nearby stations are calculated from it.
Puget Sound and the Columbia estuary amplify mixed tides far inland — ranges past 10 ft in the South Sound — with river flow stacked on top.