Alcatraz Island Tide Chart
California · NOAA Station 9414792 · 37.827°, -122.417°
Want live wind, waves, and radar right on your chart? See it in Pathr →
This Week’s Tides for Alcatraz Island
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 1:31 AM | 1.0 ft |
| High | 8:09 AM | 3.7 ft |
| Low | 12:31 PM | 2.7 ft |
| High | 7:06 PM | 5.8 ft |
| Low | 2:32 AM | 0.7 ft |
| High | 9:43 AM | 3.9 ft |
| Low | 1:38 PM | 3.2 ft |
| High | 7:54 PM | 5.9 ft |
| Low | 3:26 AM | 0.4 ft |
| High | 10:48 AM | 4.2 ft |
| Low | 2:42 PM | 3.4 ft |
| High | 8:41 PM | 5.9 ft |
| Low | 4:12 AM | 0.1 ft |
| High | 11:36 AM | 4.4 ft |
| Low | 3:37 PM | 3.4 ft |
| High | 9:28 PM | 6.0 ft |
| Low | 4:53 AM | -0.1 ft |
| High | 12:14 PM | 4.6 ft |
| Low | 4:23 PM | 3.4 ft |
| High | 10:11 PM | 6.1 ft |
| Low | 5:30 AM | -0.3 ft |
| High | 12:46 PM | 4.6 ft |
| Low | 5:04 PM | 3.3 ft |
| High | 10:53 PM | 6.2 ft |
| Low | 6:03 AM | -0.4 ft |
| High | 1:15 PM | 4.7 ft |
| Low | 5:41 PM | 3.1 ft |
| High | 11:32 PM | 6.2 ft |
Alcatraz Island Tide Table — Next 30 Days
Every high and low tide for the next month at Alcatraz Island, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 6:05 AM | 8:27 PM | Low1:31 AM1.0 ft | High8:09 AM3.7 ft | Low12:31 PM2.7 ft | High7:06 PM5.8 ft | 4.8 ft |
| Thu, Jul 23 | 6:05 AM | 8:26 PM | Low2:32 AM0.7 ft | High9:43 AM3.9 ft | Low1:38 PM3.2 ft | High7:54 PM5.9 ft | 5.2 ft |
| Fri, Jul 24 | 6:06 AM | 8:26 PM | Low3:26 AM0.4 ft | High10:48 AM4.2 ft | Low2:42 PM3.4 ft | High8:41 PM5.9 ft | 5.5 ft |
| Sat, Jul 25 | 6:07 AM | 8:25 PM | Low4:12 AM0.1 ft | High11:36 AM4.4 ft | Low3:37 PM3.4 ft | High9:28 PM6.0 ft | 5.9 ft |
| Sun, Jul 26 | 6:08 AM | 8:24 PM | Low4:53 AM-0.1 ft | High12:14 PM4.6 ft | Low4:23 PM3.4 ft | High10:11 PM6.1 ft | 6.2 ft |
| Mon, Jul 27 | 6:09 AM | 8:23 PM | Low5:30 AM-0.3 ft | High12:46 PM4.6 ft | Low5:04 PM3.3 ft | High10:53 PM6.2 ft | 6.5 ft |
| Tue, Jul 28 | 6:10 AM | 8:22 PM | Low6:03 AM-0.4 ft | High1:15 PM4.7 ft | Low5:41 PM3.1 ft | High11:32 PM6.2 ft | 6.6 ft |
| Wed, Jul 29 | 6:10 AM | 8:21 PM | Low6:34 AM-0.5 ft | High1:41 PM4.8 ft | Low6:18 PM3.0 ft | — | 5.3 ft |
| Thu, Jul 30 | 6:11 AM | 8:20 PM | High12:11 AM6.1 ft | Low7:03 AM-0.5 ft | High2:07 PM4.9 ft | Low6:55 PM2.8 ft | 6.6 ft |
| Fri, Jul 31 | 6:12 AM | 8:20 PM | High12:49 AM5.9 ft | Low7:33 AM-0.3 ft | High2:33 PM5.0 ft | Low7:35 PM2.5 ft | 6.2 ft |
| Sat, Aug 1 | 6:13 AM | 8:19 PM | High1:29 AM5.6 ft | Low8:02 AM-0.1 ft | High3:00 PM5.2 ft | Low8:18 PM2.3 ft | 5.7 ft |
| Sun, Aug 2 | 6:14 AM | 8:18 PM | High2:13 AM5.3 ft | Low8:33 AM0.3 ft | High3:28 PM5.4 ft | Low9:08 PM2.0 ft | 5.1 ft |
| Mon, Aug 3 | 6:15 AM | 8:17 PM | High3:03 AM4.8 ft | Low9:07 AM0.9 ft | High3:59 PM5.6 ft | Low10:04 PM1.6 ft | 4.7 ft |
| Tue, Aug 4 | 6:15 AM | 8:16 PM | High4:05 AM4.3 ft | Low9:44 AM1.5 ft | High4:35 PM5.9 ft | Low11:09 PM1.3 ft | 4.6 ft |
| Wed, Aug 5 | 6:16 AM | 8:14 PM | High5:28 AM3.9 ft | Low10:28 AM2.2 ft | High5:18 PM6.1 ft | — | 3.9 ft |
| Thu, Aug 6 | 6:17 AM | 8:13 PM | Low12:20 AM0.9 ft | High7:13 AM3.7 ft | Low11:24 AM2.8 ft | High6:09 PM6.2 ft | 5.3 ft |
| Fri, Aug 7 | 6:18 AM | 8:12 PM | Low1:34 AM0.4 ft | High8:58 AM3.9 ft | Low12:38 PM3.2 ft | High7:09 PM6.4 ft | 6.0 ft |
| Sat, Aug 8 | 6:19 AM | 8:11 PM | Low2:41 AM-0.1 ft | High10:11 AM4.3 ft | Low1:57 PM3.4 ft | High8:14 PM6.6 ft | 6.7 ft |
| Sun, Aug 9 | 6:20 AM | 8:10 PM | Low3:41 AM-0.6 ft | High11:04 AM4.6 ft | Low3:07 PM3.3 ft | High9:16 PM6.8 ft | 7.4 ft |
| Mon, Aug 10 | 6:21 AM | 8:09 PM | Low4:33 AM-0.9 ft | High11:47 AM4.9 ft | Low4:09 PM3.0 ft | High10:15 PM7.0 ft | 7.9 ft |
| Tue, Aug 11 | 6:21 AM | 8:08 PM | Low5:21 AM-1.1 ft | High12:26 PM5.1 ft | Low5:05 PM2.6 ft | High11:11 PM6.9 ft | 8.0 ft |
| Wed, Aug 12 | 6:22 AM | 8:06 PM | Low6:05 AM-1.1 ft | High1:03 PM5.3 ft | Low5:58 PM2.2 ft | — | 6.4 ft |
| Thu, Aug 13 | 6:23 AM | 8:05 PM | High12:03 AM6.7 ft | Low6:46 AM-0.8 ft | High1:39 PM5.5 ft | Low6:50 PM1.9 ft | 7.5 ft |
| Fri, Aug 14 | 6:24 AM | 8:04 PM | High12:55 AM6.4 ft | Low7:24 AM-0.4 ft | High2:13 PM5.6 ft | Low7:42 PM1.6 ft | 6.8 ft |
| Sat, Aug 15 | 6:25 AM | 8:03 PM | High1:46 AM5.9 ft | Low8:01 AM0.1 ft | High2:47 PM5.8 ft | Low8:34 PM1.4 ft | 5.8 ft |
| Sun, Aug 16 | 6:26 AM | 8:01 PM | High2:39 AM5.3 ft | Low8:38 AM0.8 ft | High3:21 PM5.8 ft | Low9:29 PM1.3 ft | 5.0 ft |
| Mon, Aug 17 | 6:27 AM | 8:00 PM | High3:37 AM4.7 ft | Low9:16 AM1.5 ft | High3:56 PM5.8 ft | Low10:27 PM1.2 ft | 4.6 ft |
| Tue, Aug 18 | 6:28 AM | 7:59 PM | High4:46 AM4.2 ft | Low9:57 AM2.3 ft | High4:34 PM5.7 ft | Low11:32 PM1.1 ft | 4.6 ft |
| Wed, Aug 19 | 6:28 AM | 7:58 PM | High6:15 AM3.9 ft | Low10:48 AM2.9 ft | High5:17 PM5.6 ft | — | 2.7 ft |
| Thu, Aug 20 | 6:29 AM | 7:56 PM | Low12:41 AM1.0 ft | High8:05 AM3.9 ft | Low11:59 AM3.4 ft | High6:10 PM5.6 ft | 4.6 ft |
About Alcatraz Island tides
Tide predictions for Alcatraz Island come from NOAA station 9414792 (California), computed from long-term harmonic analysis of observed water levels. Heights are shown in feet relative to MLLW (Mean Lower Low Water) — the same datum used on US nautical charts — so they line up directly with charted depths.
Alcatraz Island typically sees a mixed semidiurnal tide, with two highs and two lows of differing heights each day. Use the curve above to time a harbor entrance, a beach walk, fishing a moving tide, or clearing a shallow bar — and remember that wind and pressure can push the real water level above or below prediction. The daily tidal range in the 30-day table shows how much water moves each day: bigger ranges around the new and full moon mean stronger currents.
Frequently asked
What time is high tide in Alcatraz Island today?+
Today (Wednesday, July 22), high tide at Alcatraz Island is at 8:09 AM (3.7 ft), 7:06 PM (5.8 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Alcatraz Island today?+
Today, low tide at Alcatraz Island is at 1:31 AM (1.0 ft), 12:31 PM (2.7 ft).
What tidal datum do these Alcatraz Island tide heights use?+
All heights are given in feet relative to MLLW (Mean Lower Low Water), the standard NOAA chart datum for US tidal waters. A tide of 0.0 ft equals the chart datum; negative tides fall below it.
How accurate are these tide predictions?+
These are NOAA harmonic predictions — highly accurate for the astronomical tide. Real water levels can still differ with wind, barometric pressure, and storms, so always check current conditions before getting underway.
Never mistime a tide again.
Alcatraz Island tides, NOAA charts, live wind & waves, and smart routing — all on your phone with Pathr — free for your first two months on iOS.