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Alcatraz Island, southwest of

Alcatraz Island, southwest of Currents

A marine warning is in force for this area. The current is ebbing at 1.9 kt. Next slack water at 7:31 PM. Current predictions are astronomical, so the weather in that warning can strengthen or weaken the actual flow.

Last Current - Ebb

3:34 PM

PDT

2.4 kt

1 hour, 42 minutes ago

Next Current - Slack

7:31 PM

PDT

2 hours, 14 minutes from now

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Following Current - Flood

10:38 PM

PDT

1.8 kt

5 hours, 21 minutes from now

Today

🌊 Currents

Slack

12:29 AM

Ebb

3:19 AM

1.8 kt

Slack

6:32 AM

Flood

9:27 AM

1.8 kt

Slack

12:21 PM

Ebb

3:34 PM

2.4 kt

Slack

7:31 PM

Flood

10:38 PM

1.8 kt

🌤️ Marine Weather

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Tomorrow

🌊 Currents

Slack

1:23 AM

Ebb

4:03 AM

1.7 kt

Slack

7:08 AM

Flood

9:52 AM

1.8 kt

Slack

12:51 PM

Ebb

4:10 PM

2.4 kt

Slack

8:18 PM

Flood

11:28 PM

1.7 kt

🌤️ Marine Weather

Monday - October 12, 2026

🌊 Currents

Slack

2:17 AM

Ebb

4:48 AM

1.5 kt

Slack

7:44 AM

Flood

10:22 AM

1.7 kt

Slack

1:19 PM

Ebb

4:45 PM

2.4 kt

Slack

9:05 PM

🌤️ Marine Weather

Tuesday - October 13, 2026

🌊 Currents

Flood

12:20 AM

1.6 kt

Slack

3:10 AM

Ebb

5:34 AM

1.3 kt

Slack

8:21 AM

Flood

10:55 AM

1.6 kt

Slack

1:48 PM

Ebb

5:20 PM

2.3 kt

Slack

9:52 PM

🌤️ Marine Weather

Wednesday - October 14, 2026

🌊 Currents

Flood

1:14 AM

1.5 kt

Slack

4:03 AM

Ebb

6:21 AM

1.1 kt

Slack

9:00 AM

Flood

11:33 AM

1.4 kt

Slack

2:19 PM

Ebb

5:56 PM

2.1 kt

Slack

10:44 PM

🌤️ Marine Weather

Thursday - October 15, 2026

🌊 Currents

Flood

2:12 AM

1.3 kt

Slack

4:57 AM

Ebb

7:10 AM

1.0 kt

Slack

9:43 AM

Flood

12:15 PM

1.2 kt

Slack

2:53 PM

Ebb

6:35 PM

1.9 kt

Slack

11:41 PM

🌤️ Marine Weather

Friday - October 16, 2026

🌊 Currents

Flood

3:13 AM

1.1 kt

Slack

5:52 AM

Ebb

8:00 AM

0.8 kt

Slack

10:34 AM

Flood

1:03 PM

1.0 kt

Slack

3:33 PM

Ebb

7:19 PM

1.6 kt

🌤️ Marine Weather

7-Day Insights

Current Extremes

Fastest Flood

Sat, Oct 10

1.8 kt at 9:27 AM

Unusually fast

Fastest Ebb

Sat, Oct 10

2.4 kt at 3:34 PM

Unusually fast

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Peak Daily Currents

Fastest

Sat, Oct 10

2.4 kt max current

Faster than usual

Slowest

Fri, Oct 16

1.6 kt max current

Slower than usual

Nautical Charts for Alcatraz Island, southwest of

San Francisco Bay Candlestick Point to Angel Island

Entrance to San Francisco Bay

Gulf of the Farallones