Today's tide
Today's tides
ft above MLLW- Low2:25 AM1.0 ft
- High9:40 AM5.9 ft
- Low3:00 PM3.5 ft
- High8:38 PM6.0 ft
Tomorrow's tide (predicted)
Tomorrow's tides
ft above MLLW- Low3:13 AM1.0 ft
- High10:12 AM6.3 ft
- Low3:53 PM2.8 ft
- High9:42 PM6.1 ft
| Tide | Time | Height |
|---|---|---|
| Low | 2:25 AM | 1.0 ft |
| High | 9:40 AM | 5.9 ft |
| Low | 3:00 PM | 3.5 ft |
| High | 8:38 PM | 6.0 ft |
Best windows today
- Fishing6:00 to 8:00 PM
Today's best window (8:00 to 9:00 AM) has passed. Dawn light with the incoming tide around the 9:40 AM high. Second window 7:00 to 8:00 PM.
- Tidepools & shellingNo daylight low today
No daylight low today. The next good one is Friday at 4:00 PM.
- Surfing3:00 to 5:00 PM
Mid tide from 3:00 to 5:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 1:00 to 4:00 AM
Water drops under 1.5 ft from 1:00 to 4:00 AM. Plan to be back on the trailer before then.
Best windows tomorrow
- Fishing8:00 to 9:00 AM
Dawn light with the incoming tide around the 10:12 AM high.
- Tidepools & shellingNo daylight low today
No daylight low today. The next good one is Friday at 4:00 PM.
- Surfing4:00 to 7:00 PM
Mid tide from 4:00 to 7:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 2:00 to 5:00 AM
Under 1.5 ft around low water. Launch before 2:00 AM.
Next 7 days
October calendar →| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Range, ft |
|---|---|---|---|---|---|
| TodayTue 20 | L2:25a1.0 | H9:40a5.9 | L3:00p3.5 | H8:38p6.0 | 5.0 |
| WedOct 21 | L3:13a1.0 | H10:12a6.3 | L3:53p2.8 | H9:42p6.1 | 5.3 |
| ThuOct 22 | L3:56a1.1 | H10:41a6.8 | L4:38p1.9 | H10:40p6.3 | 5.7 |
| FriOct 23 | L4:34a1.3 | H11:09a7.4 | L5:19p1.0 | H11:34p6.5 | 6.3 |
| SatOct 24 | L5:11a1.5 | H11:38a7.9 | L6:00p0.2 | 7.7 | |
| SunOct 25 | H12:25a6.6 | L5:48a1.9 | H12:09p8.4 | L6:42p−0.6 | 9.0 |
| MonOct 26 | H1:17a6.7 | L6:25a2.3 | H12:41p8.8 | L7:24p−1.2 | 9.9 spring tide |
Spring tides Monday. Lows drop to −1.2 ft, the best shelling days this week. Spring and neap tides
Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 9418865.
Nearby stations
Currents
North Bay Channel at Samoa Channel
- Slack1:53 AM
- Max flood6:38 AM 1.0 kn
- Slack9:51 AM
- Max ebb12:27 PM 0.7 kn
- Slack2:34 PM
- Max flood5:41 PM 1.0 kn
- Slack8:19 PM
- Max ebb11:13 PM 1.0 kn
Current predictions for North Bay Channel at Samoa Channel, 5 mi away. Currents near inlets can be strong. Not for navigation.
Station details
- Datum
- Mean lower low water
- Predictions
- NOAA subordinate, from North Spit, Humboldt Bay
- Live gauge
- None
- Coordinates
- 40.865° N, 124.148° W
- Time zone
- Pacific, UTC−7
- Station ID
- NOAA 9418865
About the tides at Mad River Slough
Mad River Slough has a mixed tide. The two daily highs, and especially the two lows, can differ a lot in height. The pattern follows the reference station at North Spit, Humboldt Bay. With a mean range of about 5.6 ft, the shoreline here changes a lot between high and low water. That is larger than most California stations on this site. From the average lower low to the average higher high, the difference is 7.6 ft. Over the next two weeks the biggest daily range, 10.6 ft, comes on October 28, and the smallest, 5.0 ft, today. Looking a year ahead, predictions peak at 9.9 ft on December 24 and bottom out at −2.4 ft on June 6.
Tides here are worked out from the reference station at North Spit, Humboldt Bay, with NOAA time and height corrections. Times are good for planning, but local wind can shift them. NOAA measured the tide here from 1977 to 1980 to set up these predictions. The nearest other station is Arcata Wharf, 2 mi away, where high tide comes about 5 min later. For tidal currents, see North Bay Channel at Samoa Channel.
Predictions are based on North Spit, Humboldt Bay.
Tide predictions and water levels from NOAA CO-OPS. For planning only, not for navigation. Real water levels can differ because of wind, air pressure and river flow. Always check conditions on site.