Kelp Island Passage, Duke Island Tide Chart
Alaska · NOAA Station 9450142 · 54.877°, -131.300°
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This Week’s Tides for Kelp Island Passage, Duke Island
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 12:38 AM | 2.2 ft |
| High | 6:36 AM | 10.5 ft |
| Low | 12:29 PM | 3.2 ft |
| High | 6:50 PM | 12.9 ft |
| Low | 1:45 AM | 2.6 ft |
| High | 7:50 AM | 9.5 ft |
| Low | 1:24 PM | 4.7 ft |
| High | 7:44 PM | 12.4 ft |
| Low | 2:58 AM | 2.6 ft |
| High | 9:17 AM | 9.2 ft |
| Low | 2:33 PM | 5.6 ft |
| High | 8:48 PM | 12.2 ft |
| Low | 4:09 AM | 2.2 ft |
| High | 10:37 AM | 9.6 ft |
| Low | 3:49 PM | 6.0 ft |
| High | 9:52 PM | 12.3 ft |
| Low | 5:07 AM | 1.6 ft |
| High | 11:37 AM | 10.3 ft |
| Low | 4:53 PM | 5.7 ft |
| High | 10:50 PM | 12.8 ft |
| Low | 5:54 AM | 0.8 ft |
| High | 12:22 PM | 11.0 ft |
| Low | 5:45 PM | 5.1 ft |
| High | 11:39 PM | 13.4 ft |
| Low | 6:34 AM | 0.1 ft |
| High | 12:58 PM | 11.7 ft |
| Low | 6:27 PM | 4.4 ft |
Kelp Island Passage, Duke Island Tide Table — Next 30 Days
Every high and low tide for the next month at Kelp Island Passage, Duke Island, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Tue, Jul 21Today | 4:36 AM | 9:06 PM | Low12:38 AM2.2 ft | High6:36 AM10.5 ft | Low12:29 PM3.2 ft | High6:50 PM12.9 ft | 10.7 ft |
| Wed, Jul 22 | 4:38 AM | 9:05 PM | Low1:45 AM2.6 ft | High7:50 AM9.5 ft | Low1:24 PM4.7 ft | High7:44 PM12.4 ft | 9.8 ft |
| Thu, Jul 23 | 4:39 AM | 9:03 PM | Low2:58 AM2.6 ft | High9:17 AM9.2 ft | Low2:33 PM5.6 ft | High8:48 PM12.2 ft | 9.6 ft |
| Fri, Jul 24 | 4:41 AM | 9:02 PM | Low4:09 AM2.2 ft | High10:37 AM9.6 ft | Low3:49 PM6.0 ft | High9:52 PM12.3 ft | 10.1 ft |
| Sat, Jul 25 | 4:42 AM | 9:00 PM | Low5:07 AM1.6 ft | High11:37 AM10.3 ft | Low4:53 PM5.7 ft | High10:50 PM12.8 ft | 11.2 ft |
| Sun, Jul 26 | 4:44 AM | 8:58 PM | Low5:54 AM0.8 ft | High12:22 PM11.0 ft | Low5:45 PM5.1 ft | High11:39 PM13.4 ft | 12.6 ft |
| Mon, Jul 27 | 4:46 AM | 8:57 PM | Low6:34 AM0.1 ft | High12:58 PM11.7 ft | Low6:27 PM4.4 ft | — | 11.6 ft |
| Tue, Jul 28 | 4:48 AM | 8:55 PM | High12:21 AM14.0 ft | Low7:09 AM-0.6 ft | High1:31 PM12.3 ft | Low7:05 PM3.7 ft | 14.6 ft |
| Wed, Jul 29 | 4:49 AM | 8:53 PM | High12:59 AM14.5 ft | Low7:41 AM-1.2 ft | High2:02 PM12.9 ft | Low7:41 PM3.0 ft | 15.7 ft |
| Thu, Jul 30 | 4:51 AM | 8:51 PM | High1:35 AM14.8 ft | Low8:11 AM-1.5 ft | High2:32 PM13.4 ft | Low8:15 PM2.4 ft | 16.3 ft |
| Fri, Jul 31 | 4:53 AM | 8:49 PM | High2:10 AM14.9 ft | Low8:40 AM-1.6 ft | High3:01 PM13.7 ft | Low8:50 PM1.9 ft | 16.5 ft |
| Sat, Aug 1 | 4:54 AM | 8:48 PM | High2:45 AM14.7 ft | Low9:10 AM-1.3 ft | High3:30 PM14.0 ft | Low9:27 PM1.6 ft | 16.0 ft |
| Sun, Aug 2 | 4:56 AM | 8:46 PM | High3:22 AM14.2 ft | Low9:40 AM-0.7 ft | High4:00 PM14.2 ft | Low10:06 PM1.4 ft | 14.9 ft |
| Mon, Aug 3 | 4:58 AM | 8:44 PM | High4:01 AM13.4 ft | Low10:12 AM0.2 ft | High4:32 PM14.2 ft | Low10:51 PM1.4 ft | 14.0 ft |
| Tue, Aug 4 | 5:00 AM | 8:42 PM | High4:46 AM12.4 ft | Low10:48 AM1.4 ft | High5:09 PM14.1 ft | Low11:43 PM1.5 ft | 12.7 ft |
| Wed, Aug 5 | 5:02 AM | 8:40 PM | High5:40 AM11.3 ft | Low11:31 AM2.8 ft | High5:55 PM13.9 ft | — | 11.1 ft |
| Thu, Aug 6 | 5:03 AM | 8:38 PM | Low12:47 AM1.7 ft | High6:50 AM10.3 ft | Low12:25 PM4.2 ft | High6:53 PM13.6 ft | 11.9 ft |
| Fri, Aug 7 | 5:05 AM | 8:36 PM | Low2:04 AM1.6 ft | High8:19 AM9.8 ft | Low1:40 PM5.2 ft | High8:08 PM13.5 ft | 11.9 ft |
| Sat, Aug 8 | 5:07 AM | 8:33 PM | Low3:27 AM0.9 ft | High9:53 AM10.2 ft | Low3:11 PM5.5 ft | High9:29 PM13.9 ft | 13.0 ft |
| Sun, Aug 9 | 5:09 AM | 8:31 PM | Low4:39 AM-0.2 ft | High11:06 AM11.3 ft | Low4:33 PM4.8 ft | High10:42 PM14.8 ft | 15.0 ft |
| Mon, Aug 10 | 5:11 AM | 8:29 PM | Low5:38 AM-1.4 ft | High12:02 PM12.5 ft | Low5:38 PM3.6 ft | High11:43 PM15.7 ft | 17.1 ft |
| Tue, Aug 11 | 5:13 AM | 8:27 PM | Low6:28 AM-2.5 ft | High12:49 PM13.7 ft | Low6:32 PM2.3 ft | — | 16.2 ft |
| Wed, Aug 12 | 5:14 AM | 8:25 PM | High12:36 AM16.4 ft | Low7:12 AM-3.1 ft | High1:30 PM14.7 ft | Low7:20 PM1.1 ft | 19.5 ft |
| Thu, Aug 13 | 5:16 AM | 8:23 PM | High1:24 AM16.7 ft | Low7:53 AM-3.3 ft | High2:09 PM15.4 ft | Low8:05 PM0.2 ft | 20.0 ft |
| Fri, Aug 14 | 5:18 AM | 8:20 PM | High2:09 AM16.5 ft | Low8:31 AM-2.9 ft | High2:46 PM15.7 ft | Low8:48 PM-0.2 ft | 19.4 ft |
| Sat, Aug 15 | 5:20 AM | 8:18 PM | High2:52 AM15.8 ft | Low9:08 AM-2.0 ft | High3:21 PM15.7 ft | Low9:31 PM-0.2 ft | 17.8 ft |
| Sun, Aug 16 | 5:22 AM | 8:16 PM | High3:34 AM14.8 ft | Low9:44 AM-0.7 ft | High3:56 PM15.3 ft | Low10:13 PM0.3 ft | 16.0 ft |
| Mon, Aug 17 | 5:24 AM | 8:14 PM | High4:16 AM13.4 ft | Low10:19 AM0.9 ft | High4:30 PM14.6 ft | Low10:58 PM1.0 ft | 13.7 ft |
| Tue, Aug 18 | 5:26 AM | 8:11 PM | High5:01 AM12.0 ft | Low10:55 AM2.6 ft | High5:06 PM13.7 ft | Low11:47 PM1.9 ft | 11.8 ft |
| Wed, Aug 19 | 5:27 AM | 8:09 PM | High5:54 AM10.6 ft | Low11:35 AM4.3 ft | High5:48 PM12.8 ft | — | 8.5 ft |
About Kelp Island Passage, Duke Island tides
Tide predictions for Kelp Island Passage, Duke Island come from NOAA station 9450142 (Alaska), computed from long-term harmonic analysis of observed water levels. Heights are shown in feet relative to MLLW (Mean Lower Low Water) — the same datum used on US nautical charts — so they line up directly with charted depths.
Kelp Island Passage, Duke Island typically sees a mixed semidiurnal tide, with two highs and two lows of differing heights each day. Use the curve above to time a harbor entrance, a beach walk, fishing a moving tide, or clearing a shallow bar — and remember that wind and pressure can push the real water level above or below prediction. The daily tidal range in the 30-day table shows how much water moves each day: bigger ranges around the new and full moon mean stronger currents.
Frequently asked
What time is high tide in Kelp Island Passage, Duke Island today?+
Today (Tuesday, July 21), high tide at Kelp Island Passage, Duke Island is at 6:36 AM (10.5 ft), 6:50 PM (12.9 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Kelp Island Passage, Duke Island today?+
Today, low tide at Kelp Island Passage, Duke Island is at 12:38 AM (2.2 ft), 12:29 PM (3.2 ft).
What tidal datum do these Kelp Island Passage, Duke Island tide heights use?+
All heights are given in feet relative to MLLW (Mean Lower Low Water), the standard NOAA chart datum for US tidal waters. A tide of 0.0 ft equals the chart datum; negative tides fall below it.
How accurate are these tide predictions?+
These are NOAA harmonic predictions — highly accurate for the astronomical tide. Real water levels can still differ with wind, barometric pressure, and storms, so always check current conditions before getting underway.
Never mistime a tide again.
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