Alcatraz Island Tides Today
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Alcatraz Island runs a mean tidal range of about 4.0 ft. This month the highest water, 7.0 ft, comes on the morning of Nov 25, and the lowest, a -1.7 ft minus tide, on the evening of Nov 25.
| Low tide | 12:24 AM | 0.1 ft |
| High tide | 7:35 AM | 5.3 ft |
| Low tide | 1:19 PM | 2.1 ft |
| High tide | 6:57 PM | 4.8 ft |
Today on the water at Alcatraz Island
Today at Alcatraz Island: high tide at 7:35 AM (5.3 ft) and 6:57 PM (4.8 ft), low tide at 12:24 AM (0.1 ft) and 1:19 PM (2.1 ft). The National Weather Service forecast for Tuesday is light rain with S winds 10 to 17 mph, 61°F. Wind that strong can hold water in or push it out, so the real tide may run above or below these predictions. Sunrise is at 6:36 AM and sunset at 5:10 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Overnight | Partly Cloudy | SSW 12 mph | 57°F |
| Tuesday | Light Rain | S 10 to 17 mph | 61°F |
Forecast: National Weather Service point forecast for this location.
Where Alcatraz Island is
Alcatraz Island sits at 37.8267° N, 122.4170° W on San Francisco Bay, at San Francisco, CA. The station here is a subordinate tide prediction point. NOAA has no gauge in the water at this spot; its times and heights are published as offsets from a reference gauge, named below. The closest gauge measuring live water level is San Francisco (Golden Gate) (NOAA 9414290), 3.0 mi away, and high and low water here run on average about 16 min later than there. The nearest weather station is Pier 17, San Francisco Bay, CA, a shore station reporting wind and, at most sites, water temperature, 2.0 mi away.
The tide at Alcatraz Island
Alcatraz Island has a semidiurnal tide: two highs and two lows a day of about the same size, roughly 12 hours 25 minutes apart. This month's predictions average 1.9 high tides a day here. For the water around it: Bay tides are mixed semidiurnal, two unequal highs a day with a range near 6 ft at the Golden Gate that shifts in time as it moves into the bay and up the rivers.
About this station
- NOAA predicts tides here from San Francisco (Golden Gate), station 9414290. High tide comes about 14 min later and low tide about 18 min later than there.
Datum and source
Heights on this page are feet above mean lower low water (MLLW), the zero NOAA's nautical charts use for soundings. A predicted 0.0 ft low is the average of the lower low each day; a minus tide is water below chart datum, and a 2 ft high means 2 ft more water than the chart shows. NOAA publishes no datums for this point. Its predictions are offsets from San Francisco (Golden Gate) and are referenced to MLLW there. Source: NOAA CO-OPS station 9414792. The tide times and heights are published as time and height offsets from its reference gauge; TidalMap republishes them daily and does not alter them.
Tide stations near Alcatraz Island
- Angel Island (west side): 2.7 mi, tides at about the same time
- San Francisco (Golden Gate): 3.0 mi, tides about 16 min earlier
- Rincon Point, Pier 22 1/2: 3.0 mi, tides about 7 min later
- Yerba Buena Island: 3.3 mi, tides about 13 min later
- Sausalito: 3.6 mi, tides about 4 min earlier
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Alcatraz Island this month: Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27. These spring highs push water up into the grass and over the oyster rock; prime for poling into flooded marsh for tailing reds.
🔻 Negative (minus) low tides at Alcatraz Island this month: Nov 1, Nov 7, Nov 8, Nov 9, Nov 10, Nov 11, Nov 12, Nov 13, Nov 22, Nov 23, Nov 24, Nov 25 …. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.
Best fishing times (solunar)
Major and minor solunar windows for Alcatraz Island, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).
| Day | Major windows | Minor windows | Score |
|---|---|---|---|
| Today 🌗 | 6:42–8:42 AM 7:07–9:07 PM | 11:51–1:51 AM 1:21–3:21 PM | 49 |
| Wed Nov 4 🌗 | 7:29–9:29 AM 7:54–9:54 PM | 1:01–3:01 AM 1:47–3:47 PM | 62 |
| Thu Nov 5 🌘 | 8:15–10:15 AM 8:40–10:40 PM | 2:09–4:09 AM 2:11–4:11 PM | 74 |
| Fri Nov 6 🌘 | 9:00–11:00 AM 9:25–11:25 PM | 3:15–5:15 AM 2:36–4:36 PM | 84 |
| Sat Nov 7 🌘 | 9:45–11:45 AM 10:10–12:10 AM | 4:20–6:20 AM 3:03–5:03 PM | 92 |
| Sun Nov 8 🌘 | 10:32–12:32 PM 10:57–12:57 AM | 5:24–7:24 AM 3:32–5:32 PM | 97 |
| Mon Nov 9 🌑 | 11:20–1:20 PM 11:45–1:45 AM | 6:28–8:28 AM 4:06–6:06 PM | 99 |
Predictions & observations: NOAA CO-OPS station 9414792. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.
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