Today's tide
Today's tides
ft above MLLW- High6:47 AM4.5 ft
- Low11:07 AM3.1 ft
- High4:26 PM5.5 ft
Tomorrow's tide (predicted)
Tomorrow's tides
ft above MLLW- Low12:11 AM0.4 ft
- High8:03 AM4.5 ft
- Low12:35 PM3.2 ft
- High5:25 PM5.2 ft
| Tide | Time | Height |
|---|---|---|
| High | 6:47 AM | 4.5 ft |
| Low | 11:07 AM | 3.1 ft |
| High | 4:26 PM | 5.5 ft |
Best windows today
- Fishing5:00 to 8:00 AM
Dawn light with the incoming tide around the 6:47 AM high. Second window 2:00 to 4:00 PM.
- Tidepools & shellingNo daylight low today
No daylight low today. The next good one is Friday at 5:00 PM.
- Surfing1:00 to 2:00 PM
Mid tide from 1:00 to 2:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 12:00 to 2:00 AM
Water drops under 1.5 ft from 12:00 to 2:00 AM. Plan to be back on the trailer before then.
Best windows tomorrow
- Fishing6:00 to 7:00 AM
Dawn light with the incoming tide around the 8:03 AM high.
- Tidepools & shellingNo daylight low today
No daylight low today. The next good one is Friday at 5:00 PM.
- Surfing1:00 to 2:00 PM
Mid tide from 1:00 to 2:00 PM. No wind sensor at this station.
- Shallow boat launchAvoid 12:00 to 3:00 AM
Water drops under 1.5 ft from 12:00 to 3:00 AM. Plan to be back on the trailer before then.
Next 7 days
October calendar →| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Range, ft |
|---|---|---|---|---|---|
| TodayFri 16 | H6:47a4.5 | L11:07a3.1 | H4:26p5.5 | 2.4 | |
| SatOct 17 | L12:11a0.4 | H8:03a4.5 | L12:35p3.2 | H5:25p5.2 | 4.8 |
| SunOct 18 | L1:17a0.5 | H9:02a4.6 | L2:04p3.0 | H6:36p5.0 | 4.5 |
| MonOct 19 | L2:21a0.6 | H9:42a4.7 | L3:10p2.7 | H7:50p4.9 | 4.3 |
| TueOct 20 | L3:14a0.5 | H10:12a4.9 | L4:01p2.3 | H8:59p4.9 | 4.4 |
| WedOct 21 | L3:59a0.5 | H10:38a5.2 | L4:43p1.8 | H10:01p5.0 | 4.7 |
| ThuOct 22 | L4:37a0.6 | H11:02a5.5 | L5:20p1.3 | H10:58p5.1 | 4.9 |
Neap tides Friday. Smaller range, so highs and lows stay close to average. Spring and neap tides
Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 9415074.
Nearby stations
Currents
Davis Point, 1.0 nmi. NW of
- Slack3:31 AM
- Max flood6:34 AM 1.0 kn
- Slack9:02 AM
- Max ebb11:36 AM 0.8 kn
- Slack1:46 PM
- Max flood4:08 PM 1.0 kn
- Slack6:27 PM
- Max ebb10:37 PM 1.8 kn
Current predictions for Davis Point, 1.0 nmi. NW of, 3 mi away. Currents near inlets can be strong. Not for navigation.
Station details
- Datum
- Mean lower low water
- Predictions
- NOAA subordinate, from San Francisco, San Francisco Bay
- Live gauge
- None
- Coordinates
- 38.023° N, 122.292° W
- Time zone
- Pacific, UTC−7
- Station ID
- NOAA 9415074
About the tides at Hercules
Hercules 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 San Francisco, San Francisco Bay. The average range is about 4.5 ft. Spring tides add a little more at both ends. From the average lower low to the average higher high, the difference is 6.1 ft. The next spring tides peak on October 28, with a range of 7.9 ft. Neap tides follow today, when the range shrinks to 2.4 ft. In the next 12 months the highest predicted tide here is 7.6 ft on December 24, and the lowest is −1.6 ft on December 24.
Hercules is a subordinate station. NOAA predicts its tides by adjusting San Francisco, San Francisco Bay: highs come about 75 min and lows about 99 min later than there. NOAA measured the tide here from 1976 to 1987 to set up these predictions. The nearest other station is Selby, 4 mi away, where high tide comes about 14 min later. For tidal currents, see Davis Point, 1.0 nmi. NW of.
Predictions are based on San Francisco, San Francisco 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.