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Johnston Channel, off Halftide Rock

Johnston Channel, off Halftide Rock Currents

A marine warning is in force for this area. The current is flooding at 0.2 kt. Peaking at 1.1 kt at 7:54 PM. Current predictions are astronomical, so the weather in that warning can strengthen or weaken the actual flow.

Last Current - Slack

6:13 PM

AKDT

9 minutes ago

Next Current - Flood

7:54 PM

AKDT

1.1 kt

1 hour, 31 minutes from now

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Following Current - Slack

10:30 PM

AKDT

4 hours, 7 minutes from now

Today

🌊 Currents

Ebb

2:03 AM

NNW

1.4 kt

Slack

5:38 AM

Flood

7:37 AM

1.4 kt

Slack

10:35 AM

Ebb

3:00 PM

NNW

1.2 kt

Slack

6:13 PM

Flood

7:54 PM

1.1 kt

Slack

10:30 PM

🌤️ Marine Weather

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Tomorrow

🌊 Currents

Ebb

2:57 AM

NNW

1.4 kt

Slack

6:29 AM

Flood

8:32 AM

1.4 kt

Slack

11:35 AM

Ebb

4:25 PM

NNW

1.2 kt

Slack

7:11 PM

Flood

8:49 PM

1.0 kt

Slack

11:20 PM

🌤️ Marine Weather

Monday - October 12, 2026

🌊 Currents

Ebb

3:50 AM

NNW

1.3 kt

Slack

7:19 AM

Flood

9:26 AM

1.4 kt

Slack

12:31 PM

Ebb

5:36 PM

NNW

1.3 kt

Slack

8:08 PM

Flood

9:42 PM

0.9 kt

🌤️ Marine Weather

Tuesday - October 13, 2026

🌊 Currents

Slack

12:10 AM

Ebb

4:41 AM

NNW

1.3 kt

Slack

8:09 AM

Flood

10:16 AM

1.4 kt

Slack

1:24 PM

Ebb

6:35 PM

NNW

1.3 kt

Slack

9:02 PM

Flood

10:34 PM

0.8 kt

🌤️ Marine Weather

Wednesday - October 14, 2026

🌊 Currents

Slack

12:59 AM

Ebb

5:30 AM

NNW

1.2 kt

Slack

8:57 AM

Flood

11:04 AM

1.4 kt

Slack

2:13 PM

Ebb

7:28 PM

NNW

1.3 kt

Slack

9:55 PM

Flood

11:24 PM

0.8 kt

🌤️ Marine Weather

Thursday - October 15, 2026

🌊 Currents

Slack

1:48 AM

Ebb

6:15 AM

NNW

1.1 kt

Slack

9:45 AM

Flood

11:49 AM

1.4 kt

Slack

2:58 PM

Ebb

8:17 PM

NNW

1.3 kt

Slack

10:46 PM

🌤️ Marine Weather

Friday - October 16, 2026

🌊 Currents

Flood

12:12 AM

0.7 kt

Slack

2:36 AM

Ebb

6:59 AM

NNW

1.1 kt

Slack

10:32 AM

Flood

12:34 PM

1.4 kt

Slack

3:42 PM

Ebb

9:02 PM

NNW

1.2 kt

Slack

11:34 PM

🌤️ Marine Weather

7-Day Insights

Current Extremes

Fastest Flood

Sat, Oct 10

1.4 kt at 7:37 AM

Faster than usual

Fastest Ebb

Sat, Oct 10

1.4 kt at 2:03 AM

Faster than usual

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Peak Daily Currents

Fastest

Sat, Oct 10

1.4 kt max current

Typical

Slowest

Sat, Oct 10

1.4 kt max current

Typical

Nautical Charts for Johnston Channel, off Halftide Rock

Port Moller and Herendeen Bay

Shumagin Islands to Sanak Islands

Alaska Peninsula and Aleutian Islands to Seguam Pass