Monte Carlo Island tide predictions
56.5350, -133.7670 · NOAA station 9451247
Full daylight calendar for the Petersburg area → Alaska Daylight · Northern lights forecast for Petersburg → Alaska Aurora Forecast
Nearest buoy: Cape Edgecumbe · 87 mi W — live wind & wave reports
Tide now
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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.
7-day tides
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H = high tide · L = low tide
About this station
Monte Carlo Island 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.
Inside Passage waters are sheltered, but the ranges are real: 15 to 20 ft swings are routine, and narrow channels run strong tidal currents on the change. Out here, rain and channel weather matter more than ice.
2027 tide extremes
Highest predicted high tide: 15.3 ft — Fri Jan 22 · 12:20 PM
Lowest predicted low tide: -3.4 ft — Fri Jan 22 · 6:57 PM
Biggest single-day swing: 18.7 ft on Fri Jan 22
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Fri Jan 22 | 6:57 PM | -3.4 ft |
| Mon Jul 5 | 8:31 AM | -3.3 ft |
| Sun Jul 4 | 7:46 AM | -3.2 ft |
| Thu Jan 21 | 6:13 PM | -3.1 ft |
| Sun Jun 6 | 8:42 AM | -3.1 ft |
| Sat Jun 5 | 7:57 AM | -3.1 ft |
| Mon Aug 2 | 7:32 AM | -3.0 ft |
| Tue Aug 3 | 8:14 AM | -3.0 ft |
| Tue Jul 6 | 9:15 AM | -2.9 ft |
| Mon Dec 13 | 6:38 PM | -2.7 ft |
198 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.
Nearest tide stations
- Sumner Island · 8.7 mi S
- The Summit · 10.3 mi N
- Reid Bay · 11.1 mi SW
- Port Protection, Prince of Wales Island. · 16.9 mi S
- Port Beauclerc, Kuiu Island · 18.6 mi SW