Duwamish Waterway, Eighth Ave. South Tide Chart
Washington · NOAA Station 9447029 · 47.535°, -122.322°
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This Week’s Tides for Duwamish Waterway, Eighth Ave. South
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 6:39 AM | 1.1 ft |
| High | 2:17 PM | 8.1 ft |
| Low | 6:23 PM | 6.7 ft |
| High | 12:00 AM | 10.1 ft |
| Low | 7:32 AM | 0.5 ft |
| High | 3:51 PM | 9.0 ft |
| Low | 8:11 PM | 7.5 ft |
| High | 12:47 AM | 9.6 ft |
| Low | 8:22 AM | 0.1 ft |
| High | 4:51 PM | 9.9 ft |
| Low | 9:47 PM | 7.6 ft |
| High | 1:40 AM | 9.3 ft |
| Low | 9:08 AM | -0.3 ft |
| High | 5:34 PM | 10.4 ft |
| Low | 10:47 PM | 7.5 ft |
| High | 2:32 AM | 9.2 ft |
| Low | 9:51 AM | -0.7 ft |
| High | 6:09 PM | 10.7 ft |
| Low | 11:28 PM | 7.3 ft |
| High | 3:21 AM | 9.2 ft |
| Low | 10:31 AM | -0.9 ft |
| High | 6:36 PM | 10.8 ft |
| Low | 11:58 PM | 7.0 ft |
| High | 4:05 AM | 9.3 ft |
| Low | 11:08 AM | -1.2 ft |
| High | 6:59 PM | 10.9 ft |
Duwamish Waterway, Eighth Ave. South Tide Table — Next 30 Days
Every high and low tide for the next month at Duwamish Waterway, Eighth Ave. South, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 5:35 AM | 8:56 PM | Low6:39 AM1.1 ft | High2:17 PM8.1 ft | Low6:23 PM6.7 ft | — | 7.0 ft |
| Thu, Jul 23 | 5:36 AM | 8:55 PM | High12:00 AM10.1 ft | Low7:32 AM0.5 ft | High3:51 PM9.0 ft | Low8:11 PM7.5 ft | 9.6 ft |
| Fri, Jul 24 | 5:37 AM | 8:54 PM | High12:47 AM9.6 ft | Low8:22 AM0.1 ft | High4:51 PM9.9 ft | Low9:47 PM7.6 ft | 9.8 ft |
| Sat, Jul 25 | 5:38 AM | 8:53 PM | High1:40 AM9.3 ft | Low9:08 AM-0.3 ft | High5:34 PM10.4 ft | Low10:47 PM7.5 ft | 10.7 ft |
| Sun, Jul 26 | 5:39 AM | 8:52 PM | High2:32 AM9.2 ft | Low9:51 AM-0.7 ft | High6:09 PM10.7 ft | Low11:28 PM7.3 ft | 11.4 ft |
| Mon, Jul 27 | 5:41 AM | 8:50 PM | High3:21 AM9.2 ft | Low10:31 AM-0.9 ft | High6:36 PM10.8 ft | Low11:58 PM7.0 ft | 11.7 ft |
| Tue, Jul 28 | 5:42 AM | 8:49 PM | High4:05 AM9.3 ft | Low11:08 AM-1.2 ft | High6:59 PM10.9 ft | — | 12.1 ft |
| Wed, Jul 29 | 5:43 AM | 8:48 PM | Low12:22 AM6.7 ft | High4:47 AM9.4 ft | Low11:44 AM-1.3 ft | High7:19 PM10.9 ft | 12.2 ft |
| Thu, Jul 30 | 5:44 AM | 8:46 PM | Low12:47 AM6.3 ft | High5:28 AM9.4 ft | Low12:19 PM-1.2 ft | High7:39 PM11.1 ft | 12.3 ft |
| Fri, Jul 31 | 5:46 AM | 8:45 PM | Low1:16 AM5.7 ft | High6:10 AM9.3 ft | Low12:54 PM-0.9 ft | High8:00 PM11.2 ft | 12.1 ft |
| Sat, Aug 1 | 5:47 AM | 8:44 PM | Low1:49 AM5.0 ft | High6:56 AM9.1 ft | Low1:29 PM-0.2 ft | High8:23 PM11.3 ft | 11.5 ft |
| Sun, Aug 2 | 5:48 AM | 8:42 PM | Low2:26 AM4.1 ft | High7:46 AM8.9 ft | Low2:05 PM0.8 ft | High8:49 PM11.4 ft | 10.6 ft |
| Mon, Aug 3 | 5:49 AM | 8:41 PM | Low3:07 AM3.1 ft | High8:42 AM8.6 ft | Low2:42 PM2.1 ft | High9:16 PM11.4 ft | 9.3 ft |
| Tue, Aug 4 | 5:51 AM | 8:39 PM | Low3:52 AM2.1 ft | High9:46 AM8.3 ft | Low3:22 PM3.6 ft | High9:46 PM11.2 ft | 9.1 ft |
| Wed, Aug 5 | 5:52 AM | 8:38 PM | Low4:42 AM1.1 ft | High11:02 AM8.2 ft | Low4:08 PM5.2 ft | High10:20 PM11.0 ft | 9.9 ft |
| Thu, Aug 6 | 5:53 AM | 8:36 PM | Low5:36 AM0.2 ft | High12:39 PM8.3 ft | Low5:08 PM6.7 ft | High11:02 PM10.7 ft | 10.5 ft |
| Fri, Aug 7 | 5:54 AM | 8:35 PM | Low6:36 AM-0.5 ft | High2:37 PM8.9 ft | Low6:37 PM7.7 ft | High11:56 PM10.4 ft | 10.9 ft |
| Sat, Aug 8 | 5:56 AM | 8:33 PM | Low7:39 AM-1.2 ft | High4:02 PM9.8 ft | Low8:20 PM8.1 ft | — | 11.0 ft |
| Sun, Aug 9 | 5:57 AM | 8:32 PM | High1:02 AM10.3 ft | Low8:40 AM-1.8 ft | High4:54 PM10.5 ft | Low9:42 PM7.8 ft | 12.3 ft |
| Mon, Aug 10 | 5:58 AM | 8:30 PM | High2:12 AM10.3 ft | Low9:37 AM-2.3 ft | High5:34 PM11.0 ft | Low10:40 PM7.1 ft | 13.3 ft |
| Tue, Aug 11 | 6:00 AM | 8:28 PM | High3:18 AM10.4 ft | Low10:30 AM-2.5 ft | High6:08 PM11.3 ft | Low11:27 PM6.2 ft | 13.8 ft |
| Wed, Aug 12 | 6:01 AM | 8:27 PM | High4:19 AM10.5 ft | Low11:18 AM-2.4 ft | High6:39 PM11.5 ft | — | 13.9 ft |
| Thu, Aug 13 | 6:02 AM | 8:25 PM | Low12:12 AM5.3 ft | High5:16 AM10.4 ft | Low12:03 PM-1.8 ft | High7:09 PM11.6 ft | 13.4 ft |
| Fri, Aug 14 | 6:04 AM | 8:23 PM | Low12:55 AM4.3 ft | High6:13 AM10.1 ft | Low12:46 PM-0.9 ft | High7:37 PM11.6 ft | 12.5 ft |
| Sat, Aug 15 | 6:05 AM | 8:22 PM | Low1:38 AM3.3 ft | High7:11 AM9.7 ft | Low1:28 PM0.4 ft | High8:06 PM11.5 ft | 11.1 ft |
| Sun, Aug 16 | 6:06 AM | 8:20 PM | Low2:22 AM2.5 ft | High8:10 AM9.3 ft | Low2:10 PM1.9 ft | High8:35 PM11.3 ft | 9.4 ft |
| Mon, Aug 17 | 6:08 AM | 8:18 PM | Low3:06 AM1.8 ft | High9:12 AM8.8 ft | Low2:53 PM3.5 ft | High9:06 PM10.9 ft | 9.1 ft |
| Tue, Aug 18 | 6:09 AM | 8:16 PM | Low3:51 AM1.3 ft | High10:23 AM8.5 ft | Low3:41 PM5.1 ft | High9:39 PM10.3 ft | 9.0 ft |
| Wed, Aug 19 | 6:10 AM | 8:15 PM | Low4:39 AM1.0 ft | High11:51 AM8.4 ft | Low4:41 PM6.4 ft | High10:17 PM9.7 ft | 8.7 ft |
| Thu, Aug 20 | 6:12 AM | 8:13 PM | Low5:32 AM0.9 ft | High1:47 PM8.7 ft | Low6:17 PM7.4 ft | High11:05 PM9.1 ft | 8.2 ft |
About Duwamish Waterway, Eighth Ave. South tides
Tide predictions for Duwamish Waterway, Eighth Ave. South come from NOAA station 9447029 (Washington), 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.
Duwamish Waterway, Eighth Ave. South 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 Duwamish Waterway, Eighth Ave. South today?+
Today (Wednesday, July 22), high tide at Duwamish Waterway, Eighth Ave. South is at 2:17 PM (8.1 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Duwamish Waterway, Eighth Ave. South today?+
Today, low tide at Duwamish Waterway, Eighth Ave. South is at 6:39 AM (1.1 ft), 6:23 PM (6.7 ft).
What tidal datum do these Duwamish Waterway, Eighth Ave. South 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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