Pacific Northwest
Knappa
Knappa Slough · Oregon · NOAA station 9439069 · Tide predictions
46.1867, -123.5880
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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 · 26 mi W · Station 46243
Wind & wave reports →
Nearby tide stations
- Settlers Point, Oreg. · 4.4 mi W
- Skamokawa · 8.5 mi NE
- ASTORIA (Tongue Point), Oreg. · 8.7 mi W
- Wauna · 8.9 mi E
- Cathcart Landing, Youngs River · 11.2 mi SW
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 10.1 ft — Fri Jan 22 · 1:06 PM
Lowest predicted low tide: -1.8 ft — Mon Jul 5 · 10:25 AM
Biggest single-day swing: 11.4 ft on Fri Jan 22
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Mon Jul 5 | 10:25 AM | -1.8 ft |
| Mon Aug 2 | 9:18 AM | -1.7 ft |
| Sun Jul 4 | 9:38 AM | -1.7 ft |
| Tue Aug 3 | 10:01 AM | -1.7 ft |
| Tue Jul 6 | 11:08 AM | -1.6 ft |
| Sun Jun 6 | 10:40 AM | -1.5 ft |
| Sun Aug 1 | 8:32 AM | -1.5 ft |
| Mon Jun 7 | 11:27 AM | -1.5 ft |
| Sat Jun 5 | 9:52 AM | -1.4 ft |
| Sat Jul 3 | 8:50 AM | -1.4 ft |
182 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
NOAA builds the predictions for Knappa, Knappa Slough from the ASTORIA (Tongue Point), Oreg. station: high tides about 0.97× the height, 29 min later; low tides about 0.86× the height, 58 min later.
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.