›

Alcatraz Island, southwest of

Alcatraz Island, southwest of Currents

A marine warning is in force for this area. The current is flooding at 1.5 kt. Peaking at 1.7 kt at 11:25 PM. Current predictions are astronomical, so the weather in that warning can strengthen or weaken the actual flow.

Last Current - Slack

8:30 PM

PDT

2 hours, 5 minutes ago

Next Current - Flood

11:25 PM

PDT

1.7 kt

49 minutes from now

Download the free app. It's faster 🙂

Following Current - Slack

2:18 AM

PDT

3 hours, 42 minutes from now

Today

🌊 Currents

Slack

1:25 AM

Ebb

4:25 AM

2.1 kt

Slack

7:51 AM

Flood

10:42 AM

1.9 kt

Slack

1:39 PM

Ebb

4:42 PM

2.3 kt

Slack

8:30 PM

Flood

11:25 PM

1.7 kt

🌤️ Marine Weather

Download the free app. It's faster 🙂

Tomorrow

🌊 Currents

Slack

2:18 AM

Ebb

5:08 AM

1.9 kt

Slack

8:24 AM

Flood

11:06 AM

1.8 kt

Slack

2:09 PM

Ebb

5:19 PM

2.3 kt

Slack

9:19 PM

🌤️ Marine Weather

Monday - September 14, 2026

🌊 Currents

Flood

12:18 AM

1.5 kt

Slack

3:12 AM

Ebb

5:54 AM

1.6 kt

Slack

8:57 AM

Flood

11:35 AM

1.7 kt

Slack

2:37 PM

Ebb

5:56 PM

2.2 kt

Slack

10:10 PM

🌤️ Marine Weather

Tuesday - September 15, 2026

🌊 Currents

Flood

1:18 AM

1.4 kt

Slack

4:09 AM

Ebb

6:41 AM

1.4 kt

Slack

9:32 AM

Flood

12:09 PM

1.5 kt

Slack

3:06 PM

Ebb

6:32 PM

2.0 kt

Slack

11:06 PM

🌤️ Marine Weather

Wednesday - September 16, 2026

🌊 Currents

Flood

2:27 AM

1.2 kt

Slack

5:09 AM

Ebb

7:30 AM

1.1 kt

Slack

10:11 AM

Flood

12:48 PM

1.3 kt

Slack

3:36 PM

Ebb

7:10 PM

1.8 kt

🌤️ Marine Weather

Thursday - September 17, 2026

🌊 Currents

Slack

12:12 AM

Flood

3:41 AM

1.1 kt

Slack

6:14 AM

Ebb

8:24 AM

0.8 kt

Slack

11:00 AM

Flood

1:34 PM

1.1 kt

Slack

4:14 PM

Ebb

7:53 PM

1.6 kt

🌤️ Marine Weather

Friday - September 18, 2026

🌊 Currents

Slack

1:25 AM

Flood

4:50 AM

1.0 kt

Slack

7:20 AM

Ebb

9:24 AM

0.7 kt

Slack

12:04 PM

Flood

2:27 PM

0.9 kt

Slack

5:03 PM

Ebb

8:47 PM

1.4 kt

🌤️ Marine Weather

7-Day Insights

Current Extremes

Fastest Flood

Sat, Sep 12

1.9 kt at 10:42 AM

Unusually fast

Fastest Ebb

Sat, Sep 12

2.3 kt at 4:42 PM

Faster than usual

Download the free app. It's faster 🙂

The same tide and current predictions, on your phone.

Peak Daily Currents

Fastest

Sat, Sep 12

2.3 kt max current

Faster than usual

Slowest

Fri, Sep 18

1.4 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