Sumner Island Tide Chart
Alaska · NOAA Station 9451163 · 56.410°, -133.793°
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This Week’s Tides for Sumner Island
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 1:54 AM | 1.6 ft |
| High | 7:56 AM | 8.5 ft |
| Low | 1:04 PM | 3.6 ft |
| High | 7:34 PM | 11.3 ft |
| Low | 3:06 AM | 1.4 ft |
| High | 9:31 AM | 8.5 ft |
| Low | 2:11 PM | 4.4 ft |
| High | 8:31 PM | 11.2 ft |
| Low | 4:12 AM | 1.0 ft |
| High | 10:55 AM | 8.8 ft |
| Low | 3:29 PM | 4.8 ft |
| High | 9:32 PM | 11.3 ft |
| Low | 5:07 AM | 0.6 ft |
| High | 11:52 AM | 9.3 ft |
| Low | 4:37 PM | 4.7 ft |
| High | 10:29 PM | 11.5 ft |
| Low | 5:52 AM | 0.1 ft |
| High | 12:32 PM | 9.8 ft |
| Low | 5:30 PM | 4.4 ft |
| High | 11:18 PM | 11.8 ft |
| Low | 6:31 AM | -0.4 ft |
| High | 1:05 PM | 10.2 ft |
| Low | 6:14 PM | 4.0 ft |
| High | 12:01 AM | 12.2 ft |
| Low | 7:06 AM | -0.8 ft |
| High | 1:35 PM | 10.5 ft |
| Low | 6:53 PM | 3.5 ft |
Sumner Island Tide Table — Next 30 Days
Every high and low tide for the next month at Sumner Island, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 4:39 AM | 9:24 PM | Low1:54 AM1.6 ft | High7:56 AM8.5 ft | Low1:04 PM3.6 ft | High7:34 PM11.3 ft | 9.7 ft |
| Thu, Jul 23 | 4:40 AM | 9:22 PM | Low3:06 AM1.4 ft | High9:31 AM8.5 ft | Low2:11 PM4.4 ft | High8:31 PM11.2 ft | 9.8 ft |
| Fri, Jul 24 | 4:42 AM | 9:20 PM | Low4:12 AM1.0 ft | High10:55 AM8.8 ft | Low3:29 PM4.8 ft | High9:32 PM11.3 ft | 10.3 ft |
| Sat, Jul 25 | 4:44 AM | 9:18 PM | Low5:07 AM0.6 ft | High11:52 AM9.3 ft | Low4:37 PM4.7 ft | High10:29 PM11.5 ft | 10.9 ft |
| Sun, Jul 26 | 4:46 AM | 9:17 PM | Low5:52 AM0.1 ft | High12:32 PM9.8 ft | Low5:30 PM4.4 ft | High11:18 PM11.8 ft | 11.7 ft |
| Mon, Jul 27 | 4:48 AM | 9:15 PM | Low6:31 AM-0.4 ft | High1:05 PM10.2 ft | Low6:14 PM4.0 ft | — | 10.6 ft |
| Tue, Jul 28 | 4:49 AM | 9:13 PM | High12:01 AM12.2 ft | Low7:06 AM-0.8 ft | High1:35 PM10.5 ft | Low6:53 PM3.5 ft | 13.0 ft |
| Wed, Jul 29 | 4:51 AM | 9:11 PM | High12:39 AM12.4 ft | Low7:38 AM-1.1 ft | High2:03 PM10.8 ft | Low7:30 PM3.1 ft | 13.5 ft |
| Thu, Jul 30 | 4:53 AM | 9:09 PM | High1:16 AM12.5 ft | Low8:09 AM-1.3 ft | High2:31 PM11.1 ft | Low8:06 PM2.6 ft | 13.8 ft |
| Fri, Jul 31 | 4:55 AM | 9:07 PM | High1:52 AM12.4 ft | Low8:38 AM-1.2 ft | High2:59 PM11.4 ft | Low8:43 PM2.2 ft | 13.6 ft |
| Sat, Aug 1 | 4:57 AM | 9:05 PM | High2:28 AM12.2 ft | Low9:07 AM-0.9 ft | High3:27 PM11.7 ft | Low9:22 PM1.8 ft | 13.1 ft |
| Sun, Aug 2 | 4:59 AM | 9:03 PM | High3:07 AM11.7 ft | Low9:37 AM-0.4 ft | High3:56 PM11.9 ft | Low10:03 PM1.5 ft | 12.3 ft |
| Mon, Aug 3 | 5:01 AM | 9:01 PM | High3:49 AM11.1 ft | Low10:07 AM0.4 ft | High4:27 PM12.1 ft | Low10:50 PM1.3 ft | 11.7 ft |
| Tue, Aug 4 | 5:03 AM | 8:59 PM | High4:39 AM10.4 ft | Low10:41 AM1.3 ft | High5:03 PM12.2 ft | Low11:44 PM1.2 ft | 11.0 ft |
| Wed, Aug 5 | 5:05 AM | 8:56 PM | High5:39 AM9.6 ft | Low11:19 AM2.4 ft | High5:46 PM12.3 ft | — | 9.9 ft |
| Thu, Aug 6 | 5:07 AM | 8:54 PM | Low12:50 AM1.0 ft | High6:56 AM9.0 ft | Low12:09 PM3.4 ft | High6:41 PM12.3 ft | 11.3 ft |
| Fri, Aug 7 | 5:09 AM | 8:52 PM | Low2:09 AM0.8 ft | High8:34 AM8.8 ft | Low1:21 PM4.2 ft | High7:49 PM12.3 ft | 11.5 ft |
| Sat, Aug 8 | 5:11 AM | 8:50 PM | Low3:29 AM0.2 ft | High10:10 AM9.2 ft | Low2:54 PM4.5 ft | High9:05 PM12.5 ft | 12.3 ft |
| Sun, Aug 9 | 5:13 AM | 8:48 PM | Low4:38 AM-0.6 ft | High11:19 AM9.9 ft | Low4:19 PM4.2 ft | High10:17 PM13.0 ft | 13.6 ft |
| Mon, Aug 10 | 5:15 AM | 8:45 PM | Low5:35 AM-1.4 ft | High12:10 PM10.7 ft | Low5:26 PM3.5 ft | High11:20 PM13.4 ft | 14.8 ft |
| Tue, Aug 11 | 5:17 AM | 8:43 PM | Low6:25 AM-2.0 ft | High12:52 PM11.4 ft | Low6:22 PM2.6 ft | — | 13.4 ft |
| Wed, Aug 12 | 5:18 AM | 8:41 PM | High12:16 AM13.7 ft | Low7:09 AM-2.3 ft | High1:31 PM12.0 ft | Low7:13 PM1.8 ft | 16.0 ft |
| Thu, Aug 13 | 5:20 AM | 8:38 PM | High1:06 AM13.8 ft | Low7:50 AM-2.2 ft | High2:07 PM12.4 ft | Low8:00 PM1.1 ft | 16.0 ft |
| Fri, Aug 14 | 5:22 AM | 8:36 PM | High1:53 AM13.5 ft | Low8:28 AM-1.8 ft | High2:42 PM12.7 ft | Low8:45 PM0.7 ft | 15.3 ft |
| Sat, Aug 15 | 5:24 AM | 8:34 PM | High2:38 AM12.9 ft | Low9:04 AM-1.0 ft | High3:17 PM12.8 ft | Low9:30 PM0.5 ft | 13.9 ft |
| Sun, Aug 16 | 5:26 AM | 8:31 PM | High3:24 AM12.1 ft | Low9:38 AM0.0 ft | High3:50 PM12.7 ft | Low10:14 PM0.6 ft | 12.7 ft |
| Mon, Aug 17 | 5:28 AM | 8:29 PM | High4:10 AM11.1 ft | Low10:11 AM1.1 ft | High4:24 PM12.4 ft | Low11:00 PM0.9 ft | 11.5 ft |
| Tue, Aug 18 | 5:30 AM | 8:26 PM | High5:00 AM10.2 ft | Low10:45 AM2.3 ft | High5:00 PM11.9 ft | Low11:52 PM1.3 ft | 10.6 ft |
| Wed, Aug 19 | 5:32 AM | 8:24 PM | High6:00 AM9.3 ft | Low11:21 AM3.5 ft | High5:40 PM11.5 ft | — | 8.0 ft |
| Thu, Aug 20 | 5:34 AM | 8:21 PM | Low12:55 AM1.7 ft | High7:18 AM8.7 ft | Low12:06 PM4.4 ft | High6:31 PM11.0 ft | 9.3 ft |
About Sumner Island tides
Tide predictions for Sumner Island come from NOAA station 9451163 (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.
Sumner 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 Sumner Island today?+
Today (Wednesday, July 22), high tide at Sumner Island is at 7:56 AM (8.5 ft), 7:34 PM (11.3 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Sumner Island today?+
Today, low tide at Sumner Island is at 1:54 AM (1.6 ft), 1:04 PM (3.6 ft).
What tidal datum do these Sumner 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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