Alcatraz Island tide times

Alcatraz Is.,s.f.bay, CAAlcatraz Is.,s.f.bayNOAA 9414792Tuesday, October 20 · PDTTue Oct 20Predictions onlyChange station
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Today at Alcatraz Island the next high tide is at 7:58 PM (4.7 ft). Tomorrow's first low is at 2:38 AM.

Estimated now
3.2 ft ↑
Rising 0.5 ft per hour
Next high
7:58 PM
In 3 h 33 min · 4.7 ft
Next low
2:38 AM
In 10 h 13 min · 0.6 ft
Tide range today
4.1 ft
Mean range 3.9 ft
Predictions only. No live gauge at this station.

Today's tide

Estimated curve between high and low timesNightHeight above MLLW
0 ft2 ft4 ftNOW 4:251:53 AMLow · 0.6 ft9:11 AMHigh · 4.7 ft2:40 PMLow · 2.7 ft7:58 PMHigh · 4.7 ft
Tide chart for Alcatraz Island, today. Low 0.6 ft at 1:53 AM, high 4.7 ft at 9:11 AM, low 2.7 ft at 2:40 PM, high 4.7 ft at 7:58 PM.

Heights and times are estimated from San Francisco, San Francisco Bay using NOAA offsets. Only the high and low points are official; the curve between them is drawn by us.

Today's tides

ft above MLLW
  • Low1:53 AM0.6 ft
  • High9:11 AM4.7 ft
  • Low2:40 PM2.7 ft
  • High7:58 PM4.7 ft
Tide times for Alcatraz Island
TideTimeHeight
Low1:53 AM0.6 ft
High9:11 AM4.7 ft
Low2:40 PM2.7 ft
High7:58 PM4.7 ft
Sunrise
7:24 AM
First light 6:57
Sunset
6:27 PM
Last light 6:53
Moon
70%
Waxing gibbous
Tide range
4.1 ft
Mean 3.9 ft

Best windows today

Plan the week →
  • Fishing
    5:00 to 7:00 PM

    Today's best window (7:00 to 8:00 AM) has passed. Dawn light with the incoming tide around the 9:11 AM high. Second window 6:00 to 7:00 PM.

  • Tidepools & shelling
    No daylight low today

    No daylight low today. The next good one is Friday at 4:00 PM.

  • Surfing
    3:00 to 5:00 PM

    Mid tide from 3:00 to 5:00 PM. No wind sensor at this station.

  • Shallow boat launch
    Avoid 12:00 to 4:00 AM

    Water drops under 1.5 ft from 12:00 to 4:00 AM. Plan to be back on the trailer before then.

Plan the week

Moving water around the turn often fishes best. Local species and bait matter more than any chart.

Next 7 days

October calendar →
High and low tides for the next 7 days, heights in ft
DayTide 1Tide 2Tide 3Tide 4Range, ft
TodayTue 20L1:53a0.6H9:11a4.7L2:40p2.7H7:58p4.74.1
WedOct 21L2:38a0.6H9:37a5.0L3:22p2.1H9:00p4.84.3
ThuOct 22L3:16a0.7H10:01a5.3L3:59p1.5H9:57p4.84.5
FriOct 23L3:52a0.9H10:26a5.6L4:36p0.9H10:51p4.94.7
SatOct 24L4:27a1.3H10:53a5.9L5:13p0.2H11:45p5.05.7
SunOct 25L5:02a1.7H11:21a6.2L5:52p−0.36.6
MonOct 26H12:39a5.0L5:39a2.1H11:53a6.5L6:35p−0.87.3 spring tide

Spring tides Monday. Lows drop to −0.8 ft, the best shelling days this week. Spring and neap tides

Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 9414792.

Nearby stations

Currents

Alcatraz Island, 0.5 mile north of

  • Current predictions are delayed. Try again soon.

Current predictions for Alcatraz Island, 0.5 mile north of, 0.6 mi away. Currents near inlets can be strong. Not for navigation.

Station details

Datum
Mean lower low water
Predictions
NOAA subordinate, from San Francisco, San Francisco Bay
Live gauge
None
Coordinates
37.827° N, 122.417° W
Time zone
Pacific, UTC−7
Station ID
NOAA 9414792

About the tides at Alcatraz Island

Alcatraz Island has a mixed tide. The two daily highs, and especially the two lows, can differ a lot in height. The pattern follows the reference station at San Francisco, San Francisco Bay. The average range is about 3.9 ft. Spring tides add a little more at both ends. In the next 12 months the highest predicted tide here is 7.2 ft on December 24, and the lowest is −1.8 ft on December 24.

Alcatraz Island is a subordinate station. NOAA predicts its tides by adjusting San Francisco, San Francisco Bay: highs come about 14 min and lows about 18 min later than there. The nearest other station is San Francisco, 1 mi away. For tidal currents, see Alcatraz Island, 0.5 mile north of.

Predictions are based on San Francisco, San Francisco Bay.

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Tide predictions and water levels from NOAA CO-OPS. For planning only, not for navigation. Real water levels can differ because of wind, air pressure and river flow. Always check conditions on site.