tidealmanac
Fri, Oct 23

Saturday, October 24, 2026

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

Sun, Oct 25

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. Low4:27 AM1.3 ft0.38 m
  2. High10:53 AM5.9 ft1.80 m
  3. Low5:13 PM0.2 ft0.07 m
  4. High11:45 PM5.0 ft1.52 m

Range 5.7 ft1.73 m · 4 predicted tides · MLLW

Sun

Civil dawn
7:00 AM
Sunrise
7:26 AM
Solar noon
12:54 PM
Sunset
6:21 PM
Civil dusk
6:48 PM
Daylight
10h 55m

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

Moon

Full moon98% illuminated · day 13 of the cycle

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

This week

Wed, Oct 21L 2:38AM 0.6 ft0.20 mH 9:37AM 5.0 ft1.51 mL 3:22PM 2.1 ft0.65 mH 9:00PM 4.8 ft1.45 mThu, Oct 22L 3:16AM 0.7 ft0.23 mH 10:01AM 5.3 ft1.60 mL 3:59PM 1.5 ft0.46 mH 9:57PM 4.8 ft1.48 mFri, Oct 23L 3:52AM 0.9 ft0.29 mH 10:26AM 5.6 ft1.70 mL 4:36PM 0.9 ft0.26 mH 10:51PM 4.9 ft1.50 mSat, Oct 24L 4:27AM 1.3 ft0.38 mH 10:53AM 5.9 ft1.80 mL 5:13PM 0.2 ft0.07 mH 11:45PM 5.0 ft1.52 mSun, Oct 25L 5:02AM 1.7 ft0.50 mH 11:21AM 6.2 ft1.90 mL 5:52PM -0.3 ft-0.10 mMon, Oct 26H 12:39AM 5.0 ft1.52 mL 5:39AM 2.1 ft0.63 mH 11:53AM 6.5 ft1.98 mL 6:35PM -0.8 ft-0.24 mTue, Oct 27H 1:35AM 5.0 ft1.51 mL 6:19AM 2.5 ft0.76 mH 12:29PM 6.6 ft2.03 mL 7:20PM -1.0 ft-0.32 m