Mad River Slough, Arcata Bay Tide Chart
California · NOAA Station 9418865 · 40.865°, -124.148°
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This Week’s Tides for Mad River Slough, Arcata Bay
High and low tide times and heights (ft, MLLW) for the week ahead.
| Low | 1:50 AM | 1.2 ft |
| High | 8:12 AM | 4.7 ft |
| Low | 12:52 PM | 3.1 ft |
| High | 7:42 PM | 7.4 ft |
| Low | 2:56 AM | 0.9 ft |
| High | 9:49 AM | 4.7 ft |
| Low | 1:51 PM | 3.6 ft |
| High | 8:31 PM | 7.4 ft |
| Low | 3:54 AM | 0.6 ft |
| High | 11:14 AM | 4.9 ft |
| Low | 2:57 PM | 3.9 ft |
| High | 9:22 PM | 7.5 ft |
| Low | 4:45 AM | 0.2 ft |
| High | 12:08 PM | 5.2 ft |
| Low | 3:58 PM | 4.0 ft |
| High | 10:11 PM | 7.6 ft |
| Low | 5:28 AM | -0.1 ft |
| High | 12:46 PM | 5.5 ft |
| Low | 4:51 PM | 3.9 ft |
| High | 10:58 PM | 7.7 ft |
| Low | 6:08 AM | -0.3 ft |
| High | 1:17 PM | 5.7 ft |
| Low | 5:36 PM | 3.7 ft |
| High | 11:42 PM | 7.8 ft |
| Low | 6:43 AM | -0.6 ft |
| High | 1:46 PM | 5.8 ft |
| Low | 6:18 PM | 3.4 ft |
Mad River Slough, Arcata Bay Tide Table — Next 30 Days
Every high and low tide for the next month at Mad River Slough, Arcata Bay, with heights in feet (MLLW), the daily tidal range, and sunrise & sunset.
| Day | Sunrise | Sunset | Tides (time · ft, MLLW) | Range | |||
|---|---|---|---|---|---|---|---|
| Wed, Jul 22Today | 6:03 AM | 8:42 PM | Low1:50 AM1.2 ft | High8:12 AM4.7 ft | Low12:52 PM3.1 ft | High7:42 PM7.4 ft | 6.2 ft |
| Thu, Jul 23 | 6:04 AM | 8:41 PM | Low2:56 AM0.9 ft | High9:49 AM4.7 ft | Low1:51 PM3.6 ft | High8:31 PM7.4 ft | 6.5 ft |
| Fri, Jul 24 | 6:05 AM | 8:40 PM | Low3:54 AM0.6 ft | High11:14 AM4.9 ft | Low2:57 PM3.9 ft | High9:22 PM7.5 ft | 6.9 ft |
| Sat, Jul 25 | 6:06 AM | 8:40 PM | Low4:45 AM0.2 ft | High12:08 PM5.2 ft | Low3:58 PM4.0 ft | High10:11 PM7.6 ft | 7.4 ft |
| Sun, Jul 26 | 6:07 AM | 8:39 PM | Low5:28 AM-0.1 ft | High12:46 PM5.5 ft | Low4:51 PM3.9 ft | High10:58 PM7.7 ft | 7.8 ft |
| Mon, Jul 27 | 6:08 AM | 8:38 PM | Low6:08 AM-0.3 ft | High1:17 PM5.7 ft | Low5:36 PM3.7 ft | High11:42 PM7.8 ft | 8.1 ft |
| Tue, Jul 28 | 6:09 AM | 8:37 PM | Low6:43 AM-0.6 ft | High1:46 PM5.8 ft | Low6:18 PM3.4 ft | — | 6.4 ft |
| Wed, Jul 29 | 6:10 AM | 8:36 PM | High12:22 AM7.9 ft | Low7:17 AM-0.7 ft | High2:14 PM6.0 ft | Low6:58 PM3.2 ft | 8.6 ft |
| Thu, Jul 30 | 6:11 AM | 8:35 PM | High1:01 AM7.9 ft | Low7:48 AM-0.7 ft | High2:42 PM6.2 ft | Low7:37 PM2.9 ft | 8.6 ft |
| Fri, Jul 31 | 6:12 AM | 8:34 PM | High1:39 AM7.7 ft | Low8:19 AM-0.5 ft | High3:11 PM6.5 ft | Low8:19 PM2.7 ft | 8.2 ft |
| Sat, Aug 1 | 6:13 AM | 8:33 PM | High2:19 AM7.4 ft | Low8:49 AM-0.2 ft | High3:39 PM6.7 ft | Low9:03 PM2.4 ft | 7.6 ft |
| Sun, Aug 2 | 6:14 AM | 8:31 PM | High3:01 AM7.0 ft | Low9:19 AM0.3 ft | High4:08 PM7.0 ft | Low9:51 PM2.0 ft | 6.7 ft |
| Mon, Aug 3 | 6:15 AM | 8:30 PM | High3:50 AM6.4 ft | Low9:51 AM0.9 ft | High4:39 PM7.3 ft | Low10:45 PM1.7 ft | 6.4 ft |
| Tue, Aug 4 | 6:16 AM | 8:29 PM | High4:47 AM5.8 ft | Low10:25 AM1.6 ft | High5:14 PM7.6 ft | Low11:47 PM1.3 ft | 6.3 ft |
| Wed, Aug 5 | 6:17 AM | 8:28 PM | High5:58 AM5.2 ft | Low11:04 AM2.4 ft | High5:57 PM7.8 ft | — | 5.4 ft |
| Thu, Aug 6 | 6:18 AM | 8:27 PM | Low12:55 AM0.9 ft | High7:24 AM4.8 ft | Low11:53 AM3.0 ft | High6:49 PM8.0 ft | 7.1 ft |
| Fri, Aug 7 | 6:19 AM | 8:26 PM | Low2:07 AM0.4 ft | High8:59 AM4.8 ft | Low1:01 PM3.6 ft | High7:50 PM8.2 ft | 7.8 ft |
| Sat, Aug 8 | 6:19 AM | 8:24 PM | Low3:16 AM-0.2 ft | High10:26 AM5.1 ft | Low2:23 PM3.8 ft | High8:57 PM8.4 ft | 8.6 ft |
| Sun, Aug 9 | 6:20 AM | 8:23 PM | Low4:18 AM-0.7 ft | High11:30 AM5.5 ft | Low3:41 PM3.7 ft | High10:03 PM8.7 ft | 9.4 ft |
| Mon, Aug 10 | 6:21 AM | 8:22 PM | Low5:13 AM-1.2 ft | High12:18 PM6.0 ft | Low4:47 PM3.3 ft | High11:04 PM8.9 ft | 10.1 ft |
| Tue, Aug 11 | 6:22 AM | 8:20 PM | Low6:02 AM-1.5 ft | High12:59 PM6.4 ft | Low5:46 PM2.8 ft | — | 7.9 ft |
| Wed, Aug 12 | 6:23 AM | 8:19 PM | High12:00 AM8.9 ft | Low6:47 AM-1.5 ft | High1:38 PM6.8 ft | Low6:40 PM2.2 ft | 10.4 ft |
| Thu, Aug 13 | 6:24 AM | 8:18 PM | High12:53 AM8.8 ft | Low7:28 AM-1.3 ft | High2:14 PM7.1 ft | Low7:32 PM1.8 ft | 10.1 ft |
| Fri, Aug 14 | 6:25 AM | 8:16 PM | High1:43 AM8.4 ft | Low8:07 AM-0.8 ft | High2:50 PM7.4 ft | Low8:22 PM1.4 ft | 9.2 ft |
| Sat, Aug 15 | 6:26 AM | 8:15 PM | High2:33 AM7.8 ft | Low8:44 AM-0.1 ft | High3:24 PM7.6 ft | Low9:12 PM1.2 ft | 7.9 ft |
| Sun, Aug 16 | 6:27 AM | 8:14 PM | High3:23 AM7.1 ft | Low9:21 AM0.7 ft | High3:59 PM7.6 ft | Low10:04 PM1.1 ft | 6.9 ft |
| Mon, Aug 17 | 6:28 AM | 8:12 PM | High4:16 AM6.3 ft | Low9:56 AM1.5 ft | High4:34 PM7.6 ft | Low10:58 PM1.1 ft | 6.5 ft |
| Tue, Aug 18 | 6:29 AM | 8:11 PM | High5:15 AM5.6 ft | Low10:33 AM2.4 ft | High5:12 PM7.5 ft | Low11:56 PM1.2 ft | 6.3 ft |
| Wed, Aug 19 | 6:30 AM | 8:09 PM | High6:24 AM5.1 ft | Low11:13 AM3.2 ft | High5:54 PM7.3 ft | — | 4.1 ft |
| Thu, Aug 20 | 6:31 AM | 8:08 PM | Low1:01 AM1.2 ft | High7:50 AM4.8 ft | Low12:04 PM3.8 ft | High6:45 PM7.1 ft | 5.9 ft |
About Mad River Slough, Arcata Bay tides
Tide predictions for Mad River Slough, Arcata Bay come from NOAA station 9418865 (California), 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.
Mad River Slough, Arcata Bay 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 Mad River Slough, Arcata Bay today?+
Today (Wednesday, July 22), high tide at Mad River Slough, Arcata Bay is at 8:12 AM (4.7 ft), 7:42 PM (7.4 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Mad River Slough, Arcata Bay today?+
Today, low tide at Mad River Slough, Arcata Bay is at 1:50 AM (1.2 ft), 12:52 PM (3.1 ft).
What tidal datum do these Mad River Slough, Arcata Bay 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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