Alaska
Monte Carlo Island
Alaska · NOAA station 9451247 · Tide predictions
56.5350, -133.7670
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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
Cape Edgecumbe buoy · 87 mi W · Station 46084
Wind & wave reports →
Last light, longer plans
Daylight calendar for Petersburg → Alaska Daylight · Northern lights forecast for Petersburg → Alaska Aurora Forecast
Nearby 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
Plan ahead
2027 tide extremes for this station
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.
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.
Alaska holds the country's most extreme tides: Inside Passage channels, Cook Inlet swings past 30 ft, and Arctic stations where the tide is measured in inches and wind setup runs the show.