Korths Harbor, San Joaquin River tide chart
California · near Isleton (5 mi) · NOAA station 9415229 · times in local time (PDT)
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Tides today, Sunday, October 11
- Low 12:07 AM -0.1 ft
- High 6:15 AM 2.2 ft
- Low 11:47 AM 0.9 ft
- High 5:52 PM 3.2 ft
Were today's predicted times right where you were?
Sunrise 7:12 AM · Sunset 6:35 PM · New moon (0%)
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Fishing forecast
Hour by hour at Korths Harbor, San Joaquin RiverBest times
1:00 PM–3:00 PM and 1:00 AM–2:00 AM
New moon (0% lit)
Rain radar
Biting around here in October
- Striped bass In seasonSF Bay and Delta on moving water
- Calico bass In seasonKelp and rocks in Southern California
- Yellowtail In seasonSouthern California, warm water
General seasonal guide for California. Seasons, sizes and limits vary, so check your state rules before keeping fish.
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Weather and conditions at Korths Harbor, San Joaquin River
Loading the National Weather Service forecast… Open it on weather.gov.
Marine radio: weather channels and VHF
NOAA Weather Radio
- 162.425 MHz WX4 WNG655, Contra Costa County, CA (24 mi)
- 162.500 MHz WX6 KDX54, Big Rock Ridge, CA (56 mi)
To get alerts on a weather alert radio, program county code 006067 (Sacramento).
VHF marine channels
- Ch 16 Distress, safety and calling
- Ch 9 Boater-to-boater calling
- Ch 22A Coast Guard safety broadcasts
- Ch 13 Bridge-to-bridge (big ships, drawbridges)
- Ch 68, 69, 71, 72, 78A Recreational chat
Weather radio broadcasts are continuous; VHF channels are the US standard. Local harbors and bridges may use others, so check your chart.
Live readings from NOAA and the National Weather Service, loaded when you open this page.
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Reports are from visitors and may be wrong. Inappropriate ones are removed.
Tide times this week
| Day | High and low tides | Sunrise / sunset | Moon |
|---|---|---|---|
| Sun Oct 11 | L 12:07 AM -0.1 ftH 6:15 AM 2.2 ftL 11:47 AM 0.9 ftH 5:52 PM 3.2 ft | 7:12 AM / 6:35 PM | New moon (0%) |
| Mon Oct 12 | L 12:52 AM -0.1 ftH 7:05 AM 2.2 ftL 12:24 PM 1.1 ftH 6:27 PM 3.3 ft | 7:13 AM / 6:34 PM | New moon (2%) |
| Tue Oct 13 | L 1:36 AM -0.1 ftH 7:54 AM 2.1 ftL 1:00 PM 1.3 ftH 7:04 PM 3.3 ft | 7:13 AM / 6:33 PM | Waxing crescent (6%) |
| Wed Oct 14 | L 2:21 AM 0.0 ftH 8:45 AM 2.0 ftL 1:37 PM 1.5 ftH 7:42 PM 3.2 ft | 7:14 AM / 6:31 PM | Waxing crescent (13%) |
| Thu Oct 15 | L 3:09 AM 0.1 ftH 9:38 AM 2.0 ftL 2:16 PM 1.6 ftH 8:25 PM 3.0 ft | 7:15 AM / 6:30 PM | Waxing crescent (20%) |
| Fri Oct 16 | L 4:01 AM 0.2 ftH 10:35 AM 1.9 ftL 3:04 PM 1.6 ftH 9:13 PM 2.9 ft | 7:16 AM / 6:28 PM | Waxing crescent (30%) |
| Sat Oct 17 | L 4:55 AM 0.2 ftH 11:35 AM 1.8 ftL 4:10 PM 1.6 ftH 10:08 PM 2.7 ft | 7:17 AM / 6:27 PM | First quarter (40%) |
Best fishing times at Korths Harbor, San Joaquin River
The bite score (0 to 100) adds up what anglers watch most: moving water (a tide running harder than usual here scores higher), solunar periods (major periods of about two hours centred on the moon overhead or underfoot, minor periods of about an hour on moonrise and moonset), dawn and dusk light, and how close it is to the new or full moon. Best times are the stretches of the day scoring near that day's top.
| Day | Bite score | Best times | Major periods | Minor periods |
|---|---|---|---|---|
| Sun Oct 11 | 90 · Excellent | 1:00 PM–3:00 PM, 1:00 AM–2:00 AM | 12:24 AM–2:24 AM, 12:47 PM–2:47 PM | 7:59 AM–8:59 AM, 6:26 PM–7:26 PM |
| Mon Oct 12 | 79 · Excellent | 2:00 PM–3:00 PM, 2:00 AM–3:00 AM | 1:10 AM–3:10 AM, 1:33 PM–3:33 PM | 9:04 AM–10:04 AM, 6:57 PM–7:57 PM |
| Tue Oct 13 | 65 · Good | 3:00 PM–4:00 PM | 1:57 AM–3:57 AM, 2:22 PM–4:22 PM | 10:07 AM–11:07 AM, 7:32 PM–8:32 PM |
| Wed Oct 14 | 53 · Fair | 4:00 PM–5:00 PM | 2:46 AM–4:46 AM, 3:12 PM–5:12 PM | 11:07 AM–12:07 PM, 8:14 PM–9:14 PM |
| Thu Oct 15 | 46 · Fair | 5:00 PM–6:00 PM | 3:37 AM–5:37 AM, 4:02 PM–6:02 PM | 12:02 PM–1:02 PM, 9:03 PM–10:03 PM |
| Fri Oct 16 | 51 · Fair | 5:00 PM–7:00 PM | 4:28 AM–6:28 AM, 4:53 PM–6:53 PM | 12:51 PM–1:51 PM, 9:57 PM–10:57 PM |
| Sat Oct 17 | 52 · Fair | 6:00 PM–7:00 PM, 6:00 AM–7:00 AM | 5:18 AM–7:18 AM, 5:43 PM–7:43 PM | 1:33 PM–2:33 PM, 10:57 PM–11:57 PM |
A planning aid, not a guarantee. Wind, water clarity, bait and pressure changes matter too; the forecast above adds live wind and pressure when you open the page.
Best daylight low tides in the next two weeks
The lowest water that falls between sunrise and sunset, for tide pooling and beachcombing.
- 0.1 ft at 7:28 AM on Tuesday, October 20
- 0.1 ft at 8:10 AM on Wednesday, October 21
- 0.2 ft at 8:49 AM on Thursday, October 22
- 0.3 ft at 9:27 AM on Friday, October 23
- 0.6 ft at 10:03 AM on Saturday, October 24
- 0.9 ft at 11:47 AM on Sunday, October 11
Tide table: October 11 to November 10, 2026
Full 2026 tide table Full 2027 tide table
| Day | High and low tides | Sunrise / sunset |
|---|---|---|
| Sun Oct 11 | L 12:07 AM -0.1 ftH 6:15 AM 2.2 ftL 11:47 AM 0.9 ftH 5:52 PM 3.2 ft | 7:12 AM / 6:35 PM |
| Mon Oct 12 | L 12:52 AM -0.1 ftH 7:05 AM 2.2 ftL 12:24 PM 1.1 ftH 6:27 PM 3.3 ft | 7:13 AM / 6:34 PM |
| Tue Oct 13 | L 1:36 AM -0.1 ftH 7:54 AM 2.1 ftL 1:00 PM 1.3 ftH 7:04 PM 3.3 ft | 7:13 AM / 6:33 PM |
| Wed Oct 14 | L 2:21 AM 0.0 ftH 8:45 AM 2.0 ftL 1:37 PM 1.5 ftH 7:42 PM 3.2 ft | 7:14 AM / 6:31 PM |
| Thu Oct 15 | L 3:09 AM 0.1 ftH 9:38 AM 2.0 ftL 2:16 PM 1.6 ftH 8:25 PM 3.0 ft | 7:15 AM / 6:30 PM |
| Fri Oct 16 | L 4:01 AM 0.2 ftH 10:35 AM 1.9 ftL 3:04 PM 1.6 ftH 9:13 PM 2.9 ft | 7:16 AM / 6:28 PM |
| Sat Oct 17 | L 4:55 AM 0.2 ftH 11:35 AM 1.8 ftL 4:10 PM 1.6 ftH 10:08 PM 2.7 ft | 7:17 AM / 6:27 PM |
| Sun Oct 18 | L 5:50 AM 0.1 ftH 12:33 PM 1.8 ftL 5:26 PM 1.5 ftH 11:09 PM 2.5 ft | 7:18 AM / 6:25 PM |
| Mon Oct 19 | L 6:42 AM 0.1 ftH 1:21 PM 1.8 ftL 6:37 PM 1.2 ft | 7:19 AM / 6:24 PM |
| Tue Oct 20 | H 12:13 AM 2.3 ftL 7:28 AM 0.1 ftH 2:00 PM 1.9 ftL 7:40 PM 1.0 ft | 7:20 AM / 6:23 PM |
| Wed Oct 21 | H 1:18 AM 2.2 ftL 8:10 AM 0.1 ftH 2:34 PM 2.1 ftL 8:36 PM 0.7 ft | 7:21 AM / 6:21 PM |
| Thu Oct 22 | H 2:21 AM 2.1 ftL 8:49 AM 0.2 ftH 3:06 PM 2.3 ftL 9:27 PM 0.3 ft | 7:22 AM / 6:20 PM |
| Fri Oct 23 | H 3:20 AM 2.1 ftL 9:27 AM 0.3 ftH 3:39 PM 2.6 ftL 10:16 PM 0.1 ft | 7:23 AM / 6:19 PM |
| Sat Oct 24 | H 4:17 AM 2.1 ftL 10:03 AM 0.6 ftH 4:13 PM 3.0 ftL 11:04 PM -0.2 ft | 7:24 AM / 6:18 PM |
| Sun Oct 25 | H 5:12 AM 2.2 ftL 10:39 AM 0.8 ftH 4:48 PM 3.3 ftL 11:52 PM -0.4 ft | 7:25 AM / 6:16 PM |
| Mon Oct 26 | H 6:06 AM 2.2 ftL 11:15 AM 1.1 ftH 5:25 PM 3.6 ft | 7:26 AM / 6:15 PM |
| Tue Oct 27 | L 12:41 AM -0.5 ftH 7:01 AM 2.2 ftL 11:53 AM 1.3 ftH 6:06 PM 3.8 ft | 7:27 AM / 6:14 PM |
| Wed Oct 28 | L 1:32 AM -0.5 ftH 7:57 AM 2.2 ftL 12:33 PM 1.5 ftH 6:50 PM 3.8 ft | 7:28 AM / 6:13 PM |
| Thu Oct 29 | L 2:24 AM -0.5 ftH 8:56 AM 2.1 ftL 1:19 PM 1.6 ftH 7:40 PM 3.7 ft | 7:30 AM / 6:12 PM |
| Fri Oct 30 | L 3:20 AM -0.4 ftH 9:58 AM 2.0 ftL 2:17 PM 1.6 ftH 8:36 PM 3.5 ft | 7:31 AM / 6:10 PM |
| Sat Oct 31 | L 4:17 AM -0.3 ftH 11:01 AM 2.0 ftL 3:34 PM 1.5 ftH 9:39 PM 3.1 ft | 7:32 AM / 6:09 PM |
| Sun Nov 1 | L 4:15 AM -0.2 ftH 11:01 AM 2.0 ftL 3:59 PM 1.4 ftH 9:47 PM 2.8 ft | 6:33 AM / 5:08 PM |
| Mon Nov 2 | L 5:10 AM -0.2 ftH 11:53 AM 2.1 ftL 5:21 PM 1.1 ftH 11:00 PM 2.4 ft | 6:34 AM / 5:07 PM |
| Tue Nov 3 | L 6:00 AM -0.1 ftH 12:38 PM 2.2 ftL 6:34 PM 0.7 ft | 6:35 AM / 5:06 PM |
| Wed Nov 4 | H 12:14 AM 2.1 ftL 6:46 AM 0.1 ftH 1:17 PM 2.4 ftL 7:39 PM 0.4 ft | 6:36 AM / 5:05 PM |
| Thu Nov 5 | H 1:27 AM 1.9 ftL 7:28 AM 0.3 ftH 1:54 PM 2.7 ftL 8:35 PM 0.1 ft | 6:37 AM / 5:04 PM |
| Fri Nov 6 | H 2:34 AM 1.8 ftL 8:09 AM 0.5 ftH 2:30 PM 2.9 ftL 9:24 PM -0.1 ft | 6:38 AM / 5:03 PM |
| Sat Nov 7 | H 3:33 AM 1.8 ftL 8:48 AM 0.8 ftH 3:05 PM 3.1 ftL 10:09 PM -0.3 ft | 6:39 AM / 5:02 PM |
| Sun Nov 8 | H 4:26 AM 1.9 ftL 9:27 AM 1.0 ftH 3:40 PM 3.3 ftL 10:52 PM -0.3 ft | 6:40 AM / 5:01 PM |
| Mon Nov 9 | H 5:15 AM 2.0 ftL 10:06 AM 1.2 ftH 4:15 PM 3.4 ftL 11:34 PM -0.3 ft | 6:41 AM / 5:00 PM |
| Tue Nov 10 | H 6:01 AM 2.0 ftL 10:45 AM 1.4 ftH 4:51 PM 3.4 ft | 6:43 AM / 4:59 PM |
Heights are in feet above mean lower low water (MLLW), the zero line on most US nautical charts. A minus height means the water drops below that line.
Around Korths Harbor, San Joaquin River
Boat ramps
- Boat ramp 3.9 mi
- Boat ramp 5.1 mi
- Russo's Launch Ramp 5.3 mi
- Boat ramp 5.4 mi
Marinas
- Korths Pirates Lair 0.0 mi
- Kokopelli Kayak Rentals 0.6 mi
- Owl Harbor Marina 3.0 mi
- Oxbow Marina 3.8 mi
Fishing piers and docks
- Guest dock 0.5 mi
- Isleton Pier 5.0 mi
Distances from the tide station. Places from © OpenStreetMap contributors; links open in Google Maps.
Fish in the waters around Korths Harbor, San Joaquin River
25 kinds of fish, sharks and rays have been recorded within 15 km (about 9 miles) of this spot, most often Atlantic Cod, Striped Bass, King Salmon. The bar shows how many records each has.
- Atlantic Cod Gadus morhuaSalt water · 8527 records
- Striped Bass Morone saxatilisSalt water · 5667 records
- King Salmon Oncorhynchus tshawytschaSalt water · 2599 records
- Green Sturgeon Acipenser medirostrisSalt water · 1998 records
- White Sturgeon Acipenser transmontanusSalt water · 1768 records
- Tule Perch Hysterocarpus traskiiBrackish water · 11 records
- Pond Smelt Hypomesus olidusSalt water · 10 records
- Longfin Smelt Spirinchus thaleichthysSalt water · 10 records
- American Shad Alosa sapidissimaSalt water · 10 records
- Splittail Pogonichthys macrolepidotusBrackish water · 9 records
- Delta Smelt Hypomesus transpacificusBrackish water · 5 records
- White Catfish Ameiurus catusBrackish water · 4 records
- Sacramento Blackfish Orthodon microlepidotusBrackish water · 4 records
- Starry Flounder Platichthys stellatusSalt water · 3 records
- Northern Anchovy Engraulis mordaxSalt water · 2 records
- Three-spined Stickleback Gasterosteus aculeatusSalt water · 2 records
- Pacific Staghorn Sculpin Leptocottus armatusSalt water · 1 record
- Prickly Sculpin Cottus asperSalt water · 1 record
- Rainwater Killifish Lucania parvaSalt water · 1 record
- Western Mosquitofish Gambusia affinisBrackish water · 1 record
- Grass Carp Ctenopharyngodon idellaBrackish water · 1 record
- Golden Shiner Notemigonus crysoleucasBrackish water · 1 record
- Yellowfin Goby Acanthogobius flavimanusSalt water · 1 record
- Noble Goby Priolepis eugeniusSalt water · 1 record
- Penpoint Gunnel Apodichthys flavidusSalt water · 1 record
Fresh water nearby · 15 species
Rivers, creeks and ponds within 15 km, not the tidal water itself.
- Spotted Bass Micropterus punctulatusFresh water · 465 records
- Bluegill Lepomis macrochirusFresh water · 9 records
- Bluefin Killifish Lucania goodeiFresh water · 5 records
- Sacramento Pikeminnow Ptychocheilus grandisFresh water · 5 records
- Hitch Lavinia exilicaudaFresh water · 5 records
- Warmouth Lepomis gulosusFresh water · 3 records
- Black Crappie Pomoxis nigromaculatusFresh water · 3 records
- Brown Bullhead Ameiurus nebulosusFresh water · 2 records
- Thicktail Chub Gila crassicaudaFresh water · 2 records
- Green Sunfish Lepomis cyanellusFresh water · 2 records
- Largemouth Bass Micropterus salmoidesFresh water · 2 records
- Mississippi Silverside Menidia audensFresh water · 2 records
- Gasterosteus microcephalusFresh water · 1 record
- Hardhead Mylopharodon conocephalusFresh water · 1 record
- Bigscale Logperch Percina macrolepidaFresh water · 1 record
Records from GBIF datasets released under CC0 or CC BY 4.0 (museum collections, surveys and community sightings). It shows what has been found here, not a complete list. Check your state rules before keeping fish.
About the tides at Korths Harbor, San Joaquin River
Korths Harbor, San Joaquin River gets two high tides and two low tides most days, but one high is clearly higher than the other (and one low clearly lower), which is called a mixed tide. Over the next month the water typically rises or falls about 2.0 ft between a high and the next low.
The biggest swings in this window come around Wednesday, October 28, when the day's range reaches 4.3 ft, and again around Monday, November 9 (3.7 ft). Here the biggest ranges depend on the moon's phase and on how far north or south of the equator it is, so they don't always line up with the new and full moon. The calmest day is Wednesday, October 21, with only 2.1 ft between the day's highest and lowest water.
The lowest tide of the month is -0.5 ft at 1:32 AM on Wednesday, October 28. There are 17 minus tides (lows below the chart's zero line) in this window: the best times for tide pools, clamming and walking the flats.
The highest predicted tide is 3.8 ft at 6:50 PM on Wednesday, October 28. Onshore wind or a storm can push the real water level above that.
This is a reference (harmonic) station: NOAA predicts its tides directly from years of measured water levels here, which makes it among the most reliable predictions on the coast.
Station details
- NOAA station ID: 9415229
- Type: reference (harmonic)
- Location: 38.0976, -121.5684