Mad River Slough, Arcata Bay Tides Today
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Mad River Slough, Arcata Bay runs a mean tidal range of about 5.5 ft. This month the highest water, 9.6 ft, comes on the morning of Nov 25, and the lowest, a -2.1 ft minus tide, on the evening of Nov 25.
| Low tide | 12:55 AM | 0.3 ft |
| High tide | 8:06 AM | 6.8 ft |
| Low tide | 1:44 PM | 2.7 ft |
| High tide | 7:35 PM | 6.3 ft |
Today on the water at Mad River Slough, Arcata Bay
Today at Mad River Slough, Arcata Bay: high tide at 8:06 AM (6.8 ft) and 7:35 PM (6.3 ft), low tide at 12:55 AM (0.3 ft) and 1:44 PM (2.7 ft). The National Weather Service forecast for Tuesday is light rain likely then mostly cloudy with E winds 3 to 8 mph, 58°F. Sunrise is at 6:48 AM and sunset at 5:11 PM.
| Period | Forecast | Wind | Temp |
|---|---|---|---|
| Overnight | Light Rain Likely | ESE 8 mph | 50°F |
| Tuesday | Light Rain Likely then Mostly Cloudy | E 3 to 8 mph | 58°F |
Forecast: National Weather Service point forecast for this location.
Where Mad River Slough, Arcata Bay is
Mad River Slough, Arcata Bay sits at 40.8650° N, 124.1480° W on the California coast, at Manila, CA. The station here is a subordinate tide prediction point. NOAA has no gauge in the water at this spot; its times and heights are published as offsets from a reference gauge, named below. The closest gauge measuring live water level is Humboldt Bay (North Spit) (NOAA 9418767), 7.7 mi away, and high and low water here run on average about 39 min later than there. The nearest weather station is Humboldt, CA, a shore station reporting wind and, at most sites, water temperature, 6.6 mi away.
The tide at Mad River Slough, Arcata Bay
Mad River Slough, Arcata Bay has a mixed tide: two highs and two lows a day, but of unequal size, so one low each day drains noticeably lower than the other. This month's predictions average 1.9 high tides a day here. The mean range from lower low to higher high is 7.6 ft, and 5.6 ft between the average high and the average low, a large tide. On an average day the higher high tops the lower high by 0.7 ft and the lower low sits 1.4 ft below the other low. For the water around it: California tides are mixed semidiurnal, two highs and two lows a day of unequal height, with ranges of 4 to 7 ft.
About this station
- High tide reaches Mad River Slough, Arcata Bay about 8.3 hours after the moon passes overhead. That lag is local, which is why high water does not line up with the moon.
- NOAA predicts tides here from Humboldt Bay (North Spit), station 9418767. High tide comes about 43 min later and low tide about 35 min later than there.
- High tide heights run about 1.12 times the reference.
Datum and source
Heights on this page are feet above mean lower low water (MLLW), the zero NOAA's nautical charts use for soundings. A predicted 0.0 ft low is the average of the lower low each day; a minus tide is water below chart datum, and a 2 ft high means 2 ft more water than the chart shows. NOAA fixes MLLW at Mad River Slough, Arcata Bay from the 1983-2001 National Tidal Datum Epoch; mean higher high water is 7.6 ft above it and mean sea level 4.2 ft. The land survey datum NAVD88, the zero on topographic maps and flood maps, is 1.0 ft above MLLW here, so a water level on this page converts to NAVD88 by subtracting that amount. These datums are controlled from NOAA's Crescent City, CA gauge. Source: NOAA CO-OPS station 9418865, established 1977, gauge removed 1980. The tide times and heights are published as time and height offsets from its reference gauge; TidalMap republishes them daily and does not alter them.
Tide stations near Mad River Slough, Arcata Bay
- Arcata Wharf: 1.9 mi, tides about 12 min later
- Samoa: 3.1 mi, tides about 29 min earlier
- Eureka: 4.1 mi, tides about 20 min earlier
- Humboldt Bay (North Spit): 7.7 mi, tides about 39 min earlier
- Elk River Railroad Bridge: 7.8 mi, tides about 16 min later
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Mad River Slough, Arcata Bay this month: Nov 22, Nov 23, Nov 24, Nov 25, Nov 26, Nov 27, Nov 28. These spring highs push water up into the grass and over the oyster rock; prime for poling into flooded marsh for tailing reds.
🔻 Negative (minus) low tides at Mad River Slough, Arcata Bay this month: Nov 1, Nov 7, Nov 8, Nov 9, Nov 10, Nov 11, Nov 12, Nov 13, Nov 22, Nov 23, Nov 24, Nov 25 …. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.
Best fishing times (solunar)
Major and minor solunar windows for Mad River Slough, Arcata Bay, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).
| Day | Major windows | Minor windows | Score |
|---|---|---|---|
| Today 🌗 | 6:49–8:49 AM 7:14–9:14 PM | 11:54–1:54 AM 1:31–3:31 PM | 49 |
| Wed Nov 4 🌗 | 7:37–9:37 AM 8:02–10:02 PM | 1:06–3:06 AM 1:54–3:54 PM | 62 |
| Thu Nov 5 🌘 | 8:22–10:22 AM 8:47–10:47 PM | 2:17–4:17 AM 2:17–4:17 PM | 74 |
| Fri Nov 6 🌘 | 9:07–11:07 AM 9:32–11:32 PM | 3:25–5:25 AM 2:39–4:39 PM | 84 |
| Sat Nov 7 🌘 | 9:52–11:52 AM 10:17–12:17 AM | 4:32–6:32 AM 3:03–5:03 PM | 92 |
| Sun Nov 8 🌘 | 10:39–12:39 PM 11:04–1:04 AM | 5:39–7:39 AM 3:31–5:31 PM | 97 |
| Mon Nov 9 🌑 | 11:27–1:27 PM 11:52–1:52 AM | 6:45–8:45 AM 4:03–6:03 PM | 99 |
Predictions & observations: NOAA CO-OPS station 9418865. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.
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