Custom House Cove, Mary Island Tide Chart
Alaska · NOAA Station 9450296 · 55.100°, -131.217°
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This Week’s Tides for Custom House Cove, Mary Island
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 12:34 AM | 2.4 ft |
| High | 6:33 AM | 11.0 ft |
| Low | 12:24 PM | 3.0 ft |
| High | 6:57 PM | 13.8 ft |
| Low | 1:38 AM | 2.6 ft |
| High | 7:47 AM | 10.1 ft |
| Low | 1:18 PM | 4.3 ft |
| High | 7:54 PM | 13.5 ft |
| Low | 2:46 AM | 2.5 ft |
| High | 9:08 AM | 9.9 ft |
| Low | 2:22 PM | 5.2 ft |
| High | 8:55 PM | 13.4 ft |
| Low | 3:55 AM | 2.0 ft |
| High | 10:24 AM | 10.2 ft |
| Low | 3:34 PM | 5.6 ft |
| High | 9:56 PM | 13.7 ft |
| Low | 4:56 AM | 1.3 ft |
| High | 11:25 AM | 10.9 ft |
| Low | 4:41 PM | 5.4 ft |
| High | 10:52 PM | 14.1 ft |
| Low | 5:46 AM | 0.5 ft |
| High | 12:14 PM | 11.6 ft |
| Low | 5:36 PM | 5.0 ft |
| High | 11:40 PM | 14.6 ft |
| Low | 6:28 AM | -0.3 ft |
| High | 12:55 PM | 12.3 ft |
| Low | 6:22 PM | 4.4 ft |
Custom House Cove, Mary Island Tide Table — Next 30 Days
Every high and low tide for the next month at Custom House Cove, Mary Island, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Tue, Jul 21Today | 4:34 AM | 9:07 PM | Low12:34 AM2.4 ft | High6:33 AM11.0 ft | Low12:24 PM3.0 ft | High6:57 PM13.8 ft | 11.4 ft |
| Wed, Jul 22 | 4:36 AM | 9:06 PM | Low1:38 AM2.6 ft | High7:47 AM10.1 ft | Low1:18 PM4.3 ft | High7:54 PM13.5 ft | 10.9 ft |
| Thu, Jul 23 | 4:38 AM | 9:04 PM | Low2:46 AM2.5 ft | High9:08 AM9.9 ft | Low2:22 PM5.2 ft | High8:55 PM13.4 ft | 10.9 ft |
| Fri, Jul 24 | 4:39 AM | 9:03 PM | Low3:55 AM2.0 ft | High10:24 AM10.2 ft | Low3:34 PM5.6 ft | High9:56 PM13.7 ft | 11.7 ft |
| Sat, Jul 25 | 4:41 AM | 9:01 PM | Low4:56 AM1.3 ft | High11:25 AM10.9 ft | Low4:41 PM5.4 ft | High10:52 PM14.1 ft | 12.8 ft |
| Sun, Jul 26 | 4:43 AM | 8:59 PM | Low5:46 AM0.5 ft | High12:14 PM11.6 ft | Low5:36 PM5.0 ft | High11:40 PM14.6 ft | 14.1 ft |
| Mon, Jul 27 | 4:44 AM | 8:57 PM | Low6:28 AM-0.3 ft | High12:55 PM12.3 ft | Low6:22 PM4.4 ft | — | 12.6 ft |
| Tue, Jul 28 | 4:46 AM | 8:56 PM | High12:23 AM15.0 ft | Low7:05 AM-0.9 ft | High1:32 PM12.8 ft | Low7:01 PM3.8 ft | 15.9 ft |
| Wed, Jul 29 | 4:48 AM | 8:54 PM | High1:02 AM15.2 ft | Low7:39 AM-1.3 ft | High2:05 PM13.3 ft | Low7:37 PM3.3 ft | 16.5 ft |
| Thu, Jul 30 | 4:50 AM | 8:52 PM | High1:37 AM15.3 ft | Low8:10 AM-1.5 ft | High2:34 PM13.6 ft | Low8:12 PM2.8 ft | 16.8 ft |
| Fri, Jul 31 | 4:51 AM | 8:50 PM | High2:11 AM15.2 ft | Low8:39 AM-1.4 ft | High3:03 PM13.9 ft | Low8:46 PM2.4 ft | 16.6 ft |
| Sat, Aug 1 | 4:53 AM | 8:48 PM | High2:45 AM14.9 ft | Low9:08 AM-1.1 ft | High3:30 PM14.2 ft | Low9:22 PM2.1 ft | 16.0 ft |
| Sun, Aug 2 | 4:55 AM | 8:46 PM | High3:21 AM14.4 ft | Low9:38 AM-0.5 ft | High3:59 PM14.5 ft | Low10:01 PM1.8 ft | 15.0 ft |
| Mon, Aug 3 | 4:57 AM | 8:44 PM | High3:59 AM13.7 ft | Low10:11 AM0.4 ft | High4:31 PM14.7 ft | Low10:45 PM1.6 ft | 14.3 ft |
| Tue, Aug 4 | 4:59 AM | 8:42 PM | High4:44 AM12.8 ft | Low10:47 AM1.4 ft | High5:09 PM14.7 ft | Low11:37 PM1.6 ft | 13.3 ft |
| Wed, Aug 5 | 5:00 AM | 8:40 PM | High5:38 AM11.8 ft | Low11:31 AM2.6 ft | High5:56 PM14.7 ft | — | 12.1 ft |
| Thu, Aug 6 | 5:02 AM | 8:38 PM | Low12:40 AM1.5 ft | High6:48 AM10.9 ft | Low12:26 PM3.9 ft | High6:55 PM14.5 ft | 13.0 ft |
| Fri, Aug 7 | 5:04 AM | 8:36 PM | Low1:54 AM1.4 ft | High8:18 AM10.4 ft | Low1:37 PM4.8 ft | High8:08 PM14.6 ft | 13.2 ft |
| Sat, Aug 8 | 5:06 AM | 8:34 PM | Low3:15 AM0.7 ft | High9:49 AM10.8 ft | Low3:02 PM5.2 ft | High9:26 PM15.0 ft | 14.3 ft |
| Sun, Aug 9 | 5:08 AM | 8:32 PM | Low4:29 AM-0.3 ft | High11:03 AM11.7 ft | Low4:24 PM4.7 ft | High10:37 PM15.7 ft | 16.0 ft |
| Mon, Aug 10 | 5:10 AM | 8:30 PM | Low5:32 AM-1.6 ft | High12:01 PM12.9 ft | Low5:31 PM3.6 ft | High11:38 PM16.5 ft | 18.1 ft |
| Tue, Aug 11 | 5:11 AM | 8:28 PM | Low6:24 AM-2.6 ft | High12:50 PM14.0 ft | Low6:27 PM2.4 ft | — | 16.6 ft |
| Wed, Aug 12 | 5:13 AM | 8:25 PM | High12:33 AM17.1 ft | Low7:09 AM-3.1 ft | High1:33 PM14.9 ft | Low7:16 PM1.3 ft | 20.2 ft |
| Thu, Aug 13 | 5:15 AM | 8:23 PM | High1:22 AM17.2 ft | Low7:51 AM-3.2 ft | High2:12 PM15.5 ft | Low8:02 PM0.6 ft | 20.4 ft |
| Fri, Aug 14 | 5:17 AM | 8:21 PM | High2:08 AM16.9 ft | Low8:30 AM-2.6 ft | High2:50 PM15.8 ft | Low8:46 PM0.2 ft | 19.5 ft |
| Sat, Aug 15 | 5:19 AM | 8:19 PM | High2:52 AM16.1 ft | Low9:06 AM-1.7 ft | High3:25 PM15.8 ft | Low9:28 PM0.2 ft | 17.8 ft |
| Sun, Aug 16 | 5:21 AM | 8:16 PM | High3:34 AM15.0 ft | Low9:41 AM-0.4 ft | High4:00 PM15.5 ft | Low10:11 PM0.6 ft | 15.9 ft |
| Mon, Aug 17 | 5:23 AM | 8:14 PM | High4:15 AM13.7 ft | Low10:16 AM1.1 ft | High4:34 PM15.0 ft | Low10:55 PM1.2 ft | 13.9 ft |
| Tue, Aug 18 | 5:25 AM | 8:12 PM | High4:59 AM12.3 ft | Low10:51 AM2.6 ft | High5:11 PM14.3 ft | Low11:44 PM2.0 ft | 12.3 ft |
| Wed, Aug 19 | 5:26 AM | 8:09 PM | High5:50 AM11.0 ft | Low11:31 AM4.0 ft | High5:54 PM13.5 ft | — | 9.5 ft |
About Custom House Cove, Mary Island tides
Tide predictions for Custom House Cove, Mary Island come from NOAA station 9450296 (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.
Custom House Cove, Mary 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 Custom House Cove, Mary Island today?+
Today (Tuesday, July 21), high tide at Custom House Cove, Mary Island is at 6:33 AM (11.0 ft), 6:57 PM (13.8 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Custom House Cove, Mary Island today?+
Today, low tide at Custom House Cove, Mary Island is at 12:34 AM (2.4 ft), 12:24 PM (3.0 ft).
What tidal datum do these Custom House Cove, Mary 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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