Pacific Northwest
Umpqua River Entrance
Half Moon Bay · Oregon · NOAA station 9433445 · Tide predictions
43.6750, -124.1920
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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
Umpqua Offshore, Or (139) buoy · 19 mi W · Station 46229
Wind & wave reports →
Nearby tide stations
- Reedsport · 5.2 mi NE
- Empire · 20.1 mi S
- Coos Bay · 20.4 mi S
- Florence, Siuslaw River · 20.6 mi N
- Sitka Dock, Coos Bay · 21.3 mi S
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 8.9 ft — Fri Jan 22 · 11:30 AM
Lowest predicted low tide: -2.3 ft — Mon Jul 5 · 8:08 AM
Biggest single-day swing: 10.6 ft on Fri Jan 22
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Mon Jul 5 | 8:08 AM | -2.3 ft |
| Sun Jul 4 | 7:23 AM | -2.3 ft |
| Sun Jun 6 | 8:23 AM | -2.1 ft |
| Tue Jul 6 | 8:52 AM | -2.1 ft |
| Mon Aug 2 | 7:03 AM | -2.0 ft |
| Sat Jun 5 | 7:36 AM | -2.0 ft |
| Mon Jun 7 | 9:11 AM | -2.0 ft |
| Tue Aug 3 | 7:45 AM | -1.9 ft |
| Fri Jan 22 | 6:30 PM | -1.8 ft |
| Tue Jun 8 | 10:00 AM | -1.7 ft |
177 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
Umpqua River Entrance, Half Moon Bay 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.