tidealmanac
Sat, Oct 10

Sunday, October 11, 2026

Alcatraz Island, CA · NOAA 9414792 · MLLW · Local time (America/Los_Angeles)

Mon, Oct 12

This is a subordinate station: NOAA predicts its highs and lows from a nearby reference station and publishes no curve for it. Nothing is interpolated.

Tides

  1. High12:54 AM5.1 ft1.55 m
  2. Low6:12 AM1.7 ft0.53 m
  3. High12:32 PM6.1 ft1.85 m
  4. Low7:01 PM-0.1 ft-0.02 m

Range 6.1 ft1.87 m · 4 predicted tides · MLLW

Sun

Civil dawn
6:48 AM
Sunrise
7:14 AM
Solar noon
12:57 PM
Sunset
6:39 PM
Civil dusk
7:05 PM
Daylight
11h 25m

Computed from the station's coordinates (NOAA solar algorithm, ±1 min); not NOAA tide data. Sun calendars: sunupsundown.site.

Moon

New moon0% illuminated · day 0 of the cycle

Near new or full moon: spring tides, a larger range than average. Approximate phase, computed here.

This week

Thu, Oct 8L 4:24AM 0.3 ft0.11 mH 11:05AM 5.8 ft1.76 mL 4:58PM 0.9 ft0.28 mH 11:09PM 5.4 ft1.65 mFri, Oct 9L 5:02AM 0.7 ft0.23 mH 11:36AM 6.0 ft1.82 mL 5:41PM 0.4 ft0.14 mSat, Oct 10H 12:03AM 5.3 ft1.60 mL 5:37AM 1.2 ft0.37 mH 12:04PM 6.1 ft1.85 mL 6:21PM 0.1 ft0.04 mSun, Oct 11H 12:54AM 5.1 ft1.55 mL 6:12AM 1.7 ft0.53 mH 12:32PM 6.1 ft1.85 mL 7:01PM -0.1 ft-0.02 mMon, Oct 12H 1:46AM 4.9 ft1.49 mL 6:48AM 2.3 ft0.69 mH 1:00PM 6.0 ft1.84 mL 7:39PM -0.1 ft-0.04 mTue, Oct 13H 2:38AM 4.7 ft1.43 mL 7:24AM 2.7 ft0.83 mH 1:28PM 5.9 ft1.80 mL 8:19PM 0.0 ft-0.01 mWed, Oct 14H 3:33AM 4.5 ft1.37 mL 8:02AM 3.1 ft0.96 mH 2:00PM 5.7 ft1.74 mL 9:03PM 0.1 ft0.03 m