Castle Bay, Northwest Arm Tide Chart
Alaska · NOAA Station 9458907 · 56.232°, -158.347°
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This Week’s Tides for Castle Bay, Northwest Arm
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 4:01 AM | 1.3 ft |
| High | 9:56 AM | 4.9 ft |
| Low | 3:04 PM | 3.2 ft |
| High | 9:41 PM | 7.9 ft |
| Low | 5:09 AM | 1.0 ft |
| High | 11:23 AM | 4.8 ft |
| Low | 4:03 PM | 3.8 ft |
| High | 10:33 PM | 7.8 ft |
| Low | 6:15 AM | 0.6 ft |
| High | 12:57 PM | 5.0 ft |
| Low | 5:09 PM | 4.1 ft |
| High | 11:27 PM | 7.9 ft |
| Low | 7:10 AM | 0.2 ft |
| High | 1:55 PM | 5.3 ft |
| Low | 6:19 PM | 4.2 ft |
| High | 12:21 AM | 8.1 ft |
| Low | 7:53 AM | -0.3 ft |
| High | 2:32 PM | 5.7 ft |
| Low | 7:16 PM | 4.0 ft |
| High | 1:11 AM | 8.3 ft |
| Low | 8:30 AM | -0.7 ft |
| High | 3:04 PM | 6.1 ft |
| Low | 8:02 PM | 3.7 ft |
| High | 1:55 AM | 8.6 ft |
| Low | 9:04 AM | -1.0 ft |
| High | 3:34 PM | 6.5 ft |
| Low | 8:43 PM | 3.4 ft |
Castle Bay, Northwest Arm Tide Table — Next 30 Days
Every high and low tide for the next month at Castle Bay, Northwest Arm, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 6:18 AM | 11:01 PM | Low4:01 AM1.3 ft | High9:56 AM4.9 ft | Low3:04 PM3.2 ft | High9:41 PM7.9 ft | 6.6 ft |
| Thu, Jul 23 | 6:20 AM | 10:59 PM | Low5:09 AM1.0 ft | High11:23 AM4.8 ft | Low4:03 PM3.8 ft | High10:33 PM7.8 ft | 6.8 ft |
| Fri, Jul 24 | 6:22 AM | 10:57 PM | Low6:15 AM0.6 ft | High12:57 PM5.0 ft | Low5:09 PM4.1 ft | High11:27 PM7.9 ft | 7.3 ft |
| Sat, Jul 25 | 6:23 AM | 10:55 PM | Low7:10 AM0.2 ft | High1:55 PM5.3 ft | Low6:19 PM4.2 ft | — | 5.1 ft |
| Sun, Jul 26 | 6:25 AM | 10:54 PM | High12:21 AM8.1 ft | Low7:53 AM-0.3 ft | High2:32 PM5.7 ft | Low7:16 PM4.0 ft | 8.4 ft |
| Mon, Jul 27 | 6:27 AM | 10:52 PM | High1:11 AM8.3 ft | Low8:30 AM-0.7 ft | High3:04 PM6.1 ft | Low8:02 PM3.7 ft | 9.0 ft |
| Tue, Jul 28 | 6:29 AM | 10:50 PM | High1:55 AM8.6 ft | Low9:04 AM-1.0 ft | High3:34 PM6.5 ft | Low8:43 PM3.4 ft | 9.6 ft |
| Wed, Jul 29 | 6:31 AM | 10:48 PM | High2:35 AM8.8 ft | Low9:37 AM-1.1 ft | High4:05 PM6.9 ft | Low9:22 PM3.1 ft | 9.9 ft |
| Thu, Jul 30 | 6:32 AM | 10:46 PM | High3:13 AM8.8 ft | Low10:08 AM-1.2 ft | High4:35 PM7.2 ft | Low10:01 PM2.7 ft | 10.0 ft |
| Fri, Jul 31 | 6:34 AM | 10:44 PM | High3:52 AM8.7 ft | Low10:38 AM-1.0 ft | High5:04 PM7.5 ft | Low10:40 PM2.4 ft | 9.7 ft |
| Sat, Aug 1 | 6:36 AM | 10:42 PM | High4:31 AM8.4 ft | Low11:08 AM-0.6 ft | High5:33 PM7.8 ft | Low11:20 PM2.0 ft | 9.0 ft |
| Sun, Aug 2 | 6:38 AM | 10:40 PM | High5:13 AM8.0 ft | Low11:36 AM-0.1 ft | High6:03 PM8.1 ft | — | 8.2 ft |
| Mon, Aug 3 | 6:40 AM | 10:38 PM | Low12:03 AM1.7 ft | High5:56 AM7.4 ft | Low12:04 PM0.6 ft | High6:34 PM8.3 ft | 7.7 ft |
| Tue, Aug 4 | 6:42 AM | 10:36 PM | Low12:51 AM1.4 ft | High6:46 AM6.7 ft | Low12:33 PM1.4 ft | High7:09 PM8.4 ft | 7.0 ft |
| Wed, Aug 5 | 6:44 AM | 10:34 PM | Low1:48 AM1.1 ft | High7:48 AM5.9 ft | Low1:07 PM2.2 ft | High7:52 PM8.5 ft | 7.4 ft |
| Thu, Aug 6 | 6:46 AM | 10:32 PM | Low2:58 AM0.8 ft | High9:08 AM5.3 ft | Low1:50 PM3.0 ft | High8:47 PM8.6 ft | 7.8 ft |
| Fri, Aug 7 | 6:48 AM | 10:29 PM | Low4:13 AM0.3 ft | High10:37 AM5.1 ft | Low3:00 PM3.7 ft | High9:53 PM8.8 ft | 8.5 ft |
| Sat, Aug 8 | 6:50 AM | 10:27 PM | Low5:29 AM-0.3 ft | High12:08 PM5.3 ft | Low4:33 PM4.0 ft | High11:02 PM9.0 ft | 9.3 ft |
| Sun, Aug 9 | 6:52 AM | 10:25 PM | Low6:39 AM-0.9 ft | High1:20 PM5.9 ft | Low6:03 PM3.9 ft | — | 6.8 ft |
| Mon, Aug 10 | 6:54 AM | 10:23 PM | High12:12 AM9.3 ft | Low7:37 AM-1.6 ft | High2:11 PM6.5 ft | Low7:16 PM3.4 ft | 10.9 ft |
| Tue, Aug 11 | 6:56 AM | 10:20 PM | High1:16 AM9.7 ft | Low8:26 AM-2.0 ft | High2:54 PM7.2 ft | Low8:14 PM2.7 ft | 11.7 ft |
| Wed, Aug 12 | 6:58 AM | 10:18 PM | High2:12 AM10.0 ft | Low9:09 AM-2.1 ft | High3:33 PM7.8 ft | Low9:06 PM2.0 ft | 12.1 ft |
| Thu, Aug 13 | 7:00 AM | 10:16 PM | High3:04 AM9.9 ft | Low9:50 AM-1.9 ft | High4:11 PM8.3 ft | Low9:55 PM1.4 ft | 11.8 ft |
| Fri, Aug 14 | 7:02 AM | 10:13 PM | High3:53 AM9.6 ft | Low10:29 AM-1.4 ft | High4:47 PM8.6 ft | Low10:44 PM1.0 ft | 11.0 ft |
| Sat, Aug 15 | 7:03 AM | 10:11 PM | High4:41 AM9.0 ft | Low11:05 AM-0.6 ft | High5:22 PM8.8 ft | Low11:31 PM0.8 ft | 9.6 ft |
| Sun, Aug 16 | 7:05 AM | 10:09 PM | High5:28 AM8.2 ft | Low11:40 AM0.3 ft | High5:56 PM8.8 ft | — | 8.5 ft |
| Mon, Aug 17 | 7:07 AM | 10:06 PM | Low12:17 AM0.8 ft | High6:15 AM7.3 ft | Low12:12 PM1.3 ft | High6:31 PM8.6 ft | 7.8 ft |
| Tue, Aug 18 | 7:09 AM | 10:04 PM | Low1:05 AM0.9 ft | High7:04 AM6.4 ft | Low12:44 PM2.2 ft | High7:07 PM8.3 ft | 7.4 ft |
| Wed, Aug 19 | 7:11 AM | 10:01 PM | Low2:01 AM1.2 ft | High8:02 AM5.6 ft | Low1:15 PM3.1 ft | High7:48 PM7.9 ft | 6.7 ft |
| Thu, Aug 20 | 7:13 AM | 9:59 PM | Low3:07 AM1.4 ft | High9:19 AM5.0 ft | Low1:52 PM3.8 ft | High8:41 PM7.6 ft | 6.2 ft |
About Castle Bay, Northwest Arm tides
Tide predictions for Castle Bay, Northwest Arm come from NOAA station 9458907 (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.
Castle Bay, Northwest Arm 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 Castle Bay, Northwest Arm today?+
Today (Wednesday, July 22), high tide at Castle Bay, Northwest Arm is at 9:56 AM (4.9 ft), 9:41 PM (7.9 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Castle Bay, Northwest Arm today?+
Today, low tide at Castle Bay, Northwest Arm is at 4:01 AM (1.3 ft), 3:04 PM (3.2 ft).
What tidal datum do these Castle Bay, Northwest Arm 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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