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Portland Harbor Entrance

Portland Harbor Entrance Currents

A marine warning is in force for this area. The current is ebbing at 0.9 kt. Next slack water at 4:38 AM. Current predictions are astronomical, so the weather in that warning can strengthen or weaken the actual flow.

Last Current - Ebb

12:53 AM

EDT

1.1 kt

1 hour, 19 minutes ago

Next Current - Slack

4:38 AM

EDT

2 hours, 25 minutes from now

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Following Current - Flood

7:05 AM

EDT

0.7 kt

4 hours, 52 minutes from now

Today

🌊 Currents

Ebb

12:53 AM

1.1 kt

Slack

4:38 AM

Flood

7:05 AM

0.7 kt

Slack

10:27 AM

Ebb

1:21 PM

1.1 kt

Slack

5:01 PM

Flood

7:26 PM

0.7 kt

Slack

10:49 PM

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Tomorrow

🌊 Currents

Ebb

1:46 AM

1.1 kt

Slack

5:26 AM

Flood

7:54 AM

0.7 kt

Slack

11:16 AM

Ebb

2:12 PM

1.2 kt

Slack

5:52 PM

Flood

8:19 PM

0.7 kt

Slack

11:41 PM

🌤️ Marine Weather

Saturday - October 10, 2026

🌊 Currents

Ebb

2:35 AM

1.1 kt

Slack

6:11 AM

Flood

8:35 AM

0.7 kt

Slack

11:58 AM

Ebb

2:59 PM

1.2 kt

Slack

6:38 PM

Flood

9:03 PM

0.7 kt

🌤️ Marine Weather

Sunday - October 11, 2026

🌊 Currents

Slack

12:29 AM

Ebb

3:20 AM

1.1 kt

Slack

6:54 AM

Flood

9:14 AM

0.7 kt

Slack

12:37 PM

Ebb

3:42 PM

1.2 kt

Slack

7:21 PM

Flood

9:44 PM

0.7 kt

🌤️ Marine Weather

Monday - October 12, 2026

🌊 Currents

Slack

1:12 AM

Ebb

4:03 AM

1.1 kt

Slack

7:37 AM

Flood

9:53 AM

0.6 kt

Slack

1:14 PM

Ebb

4:24 PM

1.1 kt

Slack

8:04 PM

Flood

10:26 PM

0.7 kt

🌤️ Marine Weather

Tuesday - October 13, 2026

🌊 Currents

Slack

1:54 AM

Ebb

4:46 AM

1.0 kt

Slack

8:21 AM

Flood

10:35 AM

0.6 kt

Slack

1:50 PM

Ebb

5:07 PM

1.1 kt

Slack

8:50 PM

Flood

11:10 PM

0.6 kt

🌤️ Marine Weather

Wednesday - October 14, 2026

🌊 Currents

Slack

2:33 AM

Ebb

5:29 AM

0.9 kt

Slack

9:07 AM

Flood

11:21 AM

0.5 kt

Slack

2:29 PM

Ebb

5:52 PM

1.0 kt

Slack

9:43 PM

Flood

11:59 PM

0.5 kt

🌤️ Marine Weather

7-Day Insights

Current Extremes

Fastest Flood

Thu, Oct 8

0.7 kt at 7:05 AM

Faster than usual

Fastest Ebb

Fri, Oct 9

1.2 kt at 2:12 PM

Faster than usual

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The same tide and current predictions, on your phone.

Peak Daily Currents

Fastest

Fri, Oct 9

1.2 kt max current

Faster than usual

Slowest

Wed, Oct 14

1.0 kt max current

Slower than usual

Nautical Charts for Portland Harbor Entrance

Portland Harbor and Vicinity

Casco Bay

Monhegan Island to Cape Elizabeth