Mad River Slough, Arcata Bay, CA Tide Chart & Tide Times

NOAA tide station 9418865 · California · updated Oct 23, 2026

Sat, Oct 24: High tide 11:38 AM (7.9 ft); low tide 5:11 AM (1.5 ft) and 6:00 PM (0.2 ft).

Tide todayHigh 11:38 AMLow 5:11 AM · Low 6:00 PM
Today's range7.7 ft0.2 → 7.9 ft (MLLW)
Waves (buoy)Loading…NDBC 46244
Water temp (buoy)Loading… 
WindLoading…   
Sun7:38 AM – 6:22 PMFirst light 7:09 AM · Last light 6:51 PM

Buoy: NOAA NDBC 46244 (Humboldt Bay, North Spit, CA (168)), 11 mi away. Buoy readings are recent observations, not a surf forecast. Wind: observed at NOAA CO-OPS station 9418767 (North Spit), 8 mi away; forecast from the NOAA National Weather Service (api.weather.gov).

Mad River Slough, Arcata Bay tides — next 3 days

Shaded = night · heights in feet above MLLW · local time

YesterdayFri, Oct 23
6 AMNoon6 PM4:34a · 1.3′11:09a · 7.4′5:19p · 1.0′11:34p · 6.5′
  • Low 4:34 AM 1.3 ft
  • High 11:09 AM 7.4 ft
  • Low 5:19 PM 1.0 ft
  • High 11:34 PM 6.5 ft

First light 7:08 AMSunrise 7:37 AMSunset 6:23 PMLast light 6:52 PM

TodaySat, Oct 24
6 AMNoon6 PM5:11a · 1.5′11:38a · 7.9′6p · 0.2′
  • Low 5:11 AM 1.5 ft
  • High 11:38 AM 7.9 ft
  • Low 6:00 PM 0.2 ft

First light 7:09 AMSunrise 7:38 AMSunset 6:22 PMLast light 6:51 PM

TomorrowSun, Oct 25
6 AMNoon6 PM12:25a · 6.6′5:48a · 1.9′12:09p · 8.4′6:42p · -0.6′
  • High 12:25 AM 6.6 ft
  • Low 5:48 AM 1.9 ft
  • High 12:09 PM 8.4 ft
  • Low 6:42 PM -0.6 ft

First light 7:10 AMSunrise 7:39 AMSunset 6:21 PMLast light 6:49 PM

MondayMon, Oct 26
6 AMNoon6 PM1:17a · 6.7′6:25a · 2.3′12:41p · 8.8′7:24p · -1.2′
  • High 1:17 AM 6.7 ft
  • Low 6:25 AM 2.3 ft
  • High 12:41 PM 8.8 ft
  • Low 7:24 PM -1.2 ft

First light 7:11 AMSunrise 7:40 AMSunset 6:19 PMLast light 6:48 PM

TuesdayTue, Oct 27
6 AMNoon6 PM2:09a · 6.6′7:04a · 2.7′1:17p · 9.0′8:10p · -1.5′
  • High 2:09 AM 6.6 ft
  • Low 7:04 AM 2.7 ft
  • High 1:17 PM 9.0 ft
  • Low 8:10 PM -1.5 ft

First light 7:13 AMSunrise 7:41 AMSunset 6:18 PMLast light 6:47 PM

Mad River Slough, Arcata Bay tide table — next 8 days

Fri, Oct 23Low 4:34 AM
1.26 ft		High 11:09 AM
7.36 ft		Low 5:19 PM
1.04 ft		High 11:34 PM
6.46 ft
Sat, Oct 24Low 5:11 AM
1.53 ft		High 11:38 AM
7.90 ft		Low 6:00 PM
0.17 ft
Sun, Oct 25High 12:25 AM
6.60 ft		Low 5:48 AM
1.89 ft		High 12:09 PM
8.38 ft		Low 6:42 PM
-0.59 ft
Mon, Oct 26High 1:17 AM
6.66 ft		Low 6:25 AM
2.30 ft		High 12:41 PM
8.77 ft		Low 7:24 PM
-1.16 ft
Tue, Oct 27High 2:09 AM
6.62 ft		Low 7:04 AM
2.72 ft		High 1:17 PM
9.00 ft		Low 8:10 PM
-1.48 ft
Wed, Oct 28High 3:02 AM
6.48 ft		Low 7:45 AM
3.12 ft		High 1:56 PM
9.03 ft		Low 8:58 PM
-1.54 ft
Thu, Oct 29High 4:00 AM
6.28 ft		Low 8:31 AM
3.47 ft		High 2:42 PM
8.82 ft		Low 9:51 PM
-1.35 ft
Fri, Oct 30High 5:01 AM
6.09 ft		Low 9:25 AM
3.75 ft		High 3:34 PM
8.40 ft		Low 10:48 PM
-1.00 ft
Sat, Oct 31High 6:07 AM
6.00 ft		Low 10:32 AM
3.92 ft		High 4:37 PM
7.82 ft		Low 11:50 PM
-0.58 ft

Times are local (standard/daylight). Heights in feet above MLLW.

Nearby tide stations

About this station

NOAA station ID
9418865
Type
Subordinate station (offsets from NOAA station 9418767)
Coordinates
40.8650, -124.1480
Datum
MLLW (feet)
Time zone
America/Los_Angeles

FAQ

When is high tide today at Mad River Slough, Arcata Bay, CA?

On Sat, Oct 24, predicted high tide at Mad River Slough, Arcata Bay, CA is at 11:38 AM local time.

When is low tide today at Mad River Slough, Arcata Bay, CA?

On Sat, Oct 24, predicted low tide at Mad River Slough, Arcata Bay, CA is at 5:11 AM, 6:00 PM local time.

Where does this tide data come from?

Predictions come from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS), station 9418865. Heights are in feet relative to Mean Lower Low Water (MLLW).