Union Tide Chart
Washington · NOAA Station 9445478 · 47.358°, -123.098°
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This Week’s Tides for Union
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 6:16 AM | 1.3 ft |
| High | 1:36 PM | 8.4 ft |
| Low | 5:37 PM | 7.2 ft |
| High | 11:19 PM | 10.9 ft |
| Low | 7:08 AM | 0.7 ft |
| High | 3:00 PM | 9.2 ft |
| Low | 6:53 PM | 8.2 ft |
| High | 11:52 PM | 10.6 ft |
| Low | 7:57 AM | 0.1 ft |
| High | 4:02 PM | 10.1 ft |
| Low | 8:08 PM | 8.6 ft |
| High | 12:37 AM | 10.3 ft |
| Low | 8:44 AM | -0.5 ft |
| High | 4:46 PM | 10.8 ft |
| Low | 9:14 PM | 8.6 ft |
| High | 1:31 AM | 10.2 ft |
| Low | 9:29 AM | -0.9 ft |
| High | 5:21 PM | 11.4 ft |
| Low | 10:11 PM | 8.4 ft |
| High | 2:25 AM | 10.1 ft |
| Low | 10:11 AM | -1.4 ft |
| High | 5:53 PM | 11.8 ft |
| Low | 11:00 PM | 8.0 ft |
| High | 3:15 AM | 10.0 ft |
| Low | 10:51 AM | -1.6 ft |
| High | 6:25 PM | 12.2 ft |
| Low | 11:43 PM | 7.4 ft |
Union Tide Table — Next 30 Days
Every high and low tide for the next month at Union, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 5:38 AM | 8:59 PM | Low6:16 AM1.3 ft | High1:36 PM8.4 ft | Low5:37 PM7.2 ft | High11:19 PM10.9 ft | 9.6 ft |
| Thu, Jul 23 | 5:40 AM | 8:57 PM | Low7:08 AM0.7 ft | High3:00 PM9.2 ft | Low6:53 PM8.2 ft | High11:52 PM10.6 ft | 9.9 ft |
| Fri, Jul 24 | 5:41 AM | 8:56 PM | Low7:57 AM0.1 ft | High4:02 PM10.1 ft | Low8:08 PM8.6 ft | — | 10.0 ft |
| Sat, Jul 25 | 5:42 AM | 8:55 PM | High12:37 AM10.3 ft | Low8:44 AM-0.5 ft | High4:46 PM10.8 ft | Low9:14 PM8.6 ft | 11.3 ft |
| Sun, Jul 26 | 5:43 AM | 8:54 PM | High1:31 AM10.2 ft | Low9:29 AM-0.9 ft | High5:21 PM11.4 ft | Low10:11 PM8.4 ft | 12.3 ft |
| Mon, Jul 27 | 5:44 AM | 8:53 PM | High2:25 AM10.1 ft | Low10:11 AM-1.4 ft | High5:53 PM11.8 ft | Low11:00 PM8.0 ft | 13.2 ft |
| Tue, Jul 28 | 5:46 AM | 8:52 PM | High3:15 AM10.0 ft | Low10:51 AM-1.6 ft | High6:25 PM12.2 ft | Low11:43 PM7.4 ft | 13.8 ft |
| Wed, Jul 29 | 5:47 AM | 8:50 PM | High4:03 AM9.9 ft | Low11:28 AM-1.7 ft | High6:55 PM12.4 ft | — | 14.1 ft |
| Thu, Jul 30 | 5:48 AM | 8:49 PM | Low12:24 AM6.9 ft | High4:48 AM9.7 ft | Low12:03 PM-1.4 ft | High7:24 PM12.4 ft | 13.8 ft |
| Fri, Jul 31 | 5:49 AM | 8:48 PM | Low1:04 AM6.2 ft | High5:32 AM9.4 ft | Low12:37 PM-0.8 ft | High7:51 PM12.4 ft | 13.2 ft |
| Sat, Aug 1 | 5:50 AM | 8:46 PM | Low1:43 AM5.5 ft | High6:19 AM9.1 ft | Low1:10 PM0.1 ft | High8:15 PM12.2 ft | 12.1 ft |
| Sun, Aug 2 | 5:52 AM | 8:45 PM | Low2:23 AM4.7 ft | High7:12 AM8.7 ft | Low1:43 PM1.3 ft | High8:35 PM11.9 ft | 10.6 ft |
| Mon, Aug 3 | 5:53 AM | 8:43 PM | Low3:03 AM3.8 ft | High8:14 AM8.4 ft | Low2:18 PM2.8 ft | High8:52 PM11.7 ft | 8.9 ft |
| Tue, Aug 4 | 5:54 AM | 8:42 PM | Low3:46 AM2.8 ft | High9:32 AM8.2 ft | Low2:57 PM4.4 ft | High9:10 PM11.5 ft | 8.7 ft |
| Wed, Aug 5 | 5:56 AM | 8:40 PM | Low4:33 AM1.8 ft | High11:08 AM8.2 ft | Low3:43 PM6.0 ft | High9:35 PM11.4 ft | 9.6 ft |
| Thu, Aug 6 | 5:57 AM | 8:39 PM | Low5:26 AM0.8 ft | High12:52 PM8.8 ft | Low4:50 PM7.5 ft | High10:08 PM11.2 ft | 10.4 ft |
| Fri, Aug 7 | 5:58 AM | 8:37 PM | Low6:24 AM-0.3 ft | High2:21 PM9.8 ft | Low6:27 PM8.6 ft | High10:54 PM11.0 ft | 11.3 ft |
| Sat, Aug 8 | 5:59 AM | 8:36 PM | Low7:25 AM-1.2 ft | High3:29 PM10.8 ft | Low7:56 PM8.9 ft | High11:56 PM10.8 ft | 12.0 ft |
| Sun, Aug 9 | 6:01 AM | 8:34 PM | Low8:23 AM-2.1 ft | High4:20 PM11.7 ft | Low9:09 PM8.6 ft | — | 13.8 ft |
| Mon, Aug 10 | 6:02 AM | 8:33 PM | High1:16 AM10.7 ft | Low9:19 AM-2.7 ft | High5:03 PM12.3 ft | Low10:09 PM7.9 ft | 15.0 ft |
| Tue, Aug 11 | 6:03 AM | 8:31 PM | High2:36 AM10.7 ft | Low10:11 AM-3.0 ft | High5:41 PM12.7 ft | Low11:01 PM7.0 ft | 15.7 ft |
| Wed, Aug 12 | 6:05 AM | 8:29 PM | High3:49 AM10.7 ft | Low10:59 AM-2.8 ft | High6:16 PM12.9 ft | Low11:49 PM5.8 ft | 15.7 ft |
| Thu, Aug 13 | 6:06 AM | 8:28 PM | High4:54 AM10.7 ft | Low11:45 AM-2.1 ft | High6:49 PM12.9 ft | — | 15.0 ft |
| Fri, Aug 14 | 6:07 AM | 8:26 PM | Low12:34 AM4.7 ft | High5:55 AM10.5 ft | Low12:28 PM-1.0 ft | High7:21 PM12.7 ft | 13.7 ft |
| Sat, Aug 15 | 6:09 AM | 8:24 PM | Low1:19 AM3.6 ft | High6:54 AM10.1 ft | Low1:09 PM0.6 ft | High7:52 PM12.4 ft | 11.8 ft |
| Sun, Aug 16 | 6:10 AM | 8:23 PM | Low2:04 AM2.8 ft | High7:56 AM9.6 ft | Low1:51 PM2.3 ft | High8:20 PM12.0 ft | 9.7 ft |
| Mon, Aug 17 | 6:11 AM | 8:21 PM | Low2:50 AM2.1 ft | High9:01 AM9.2 ft | Low2:32 PM4.0 ft | High8:46 PM11.5 ft | 9.4 ft |
| Tue, Aug 18 | 6:13 AM | 8:19 PM | Low3:37 AM1.7 ft | High10:12 AM8.9 ft | Low3:17 PM5.6 ft | High9:08 PM11.0 ft | 9.3 ft |
| Wed, Aug 19 | 6:14 AM | 8:17 PM | Low4:27 AM1.5 ft | High11:34 AM8.8 ft | Low4:09 PM6.9 ft | High9:29 PM10.5 ft | 9.0 ft |
| Thu, Aug 20 | 6:15 AM | 8:15 PM | Low5:21 AM1.3 ft | High1:05 PM9.1 ft | Low5:18 PM8.0 ft | High9:54 PM10.1 ft | 8.8 ft |
About Union tides
Tide predictions for Union come from NOAA station 9445478 (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.
Union 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 Union today?+
Today (Wednesday, July 22), high tide at Union is at 1:36 PM (8.4 ft), 11:19 PM (10.9 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Union today?+
Today, low tide at Union is at 6:16 AM (1.3 ft), 5:37 PM (7.2 ft).
What tidal datum do these Union 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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