Today's tide
Today's tides
ft above MLLW- High12:54 AM5.1 ft
- Low6:12 AM1.7 ft
- High12:32 PM6.1 ft
- Low7:01 PM−0.1 ft
Tomorrow's tide (predicted)
Tomorrow's tides
ft above MLLW- High1:46 AM4.9 ft
- Low6:48 AM2.3 ft
- High1:00 PM6.0 ft
- Low7:39 PM−0.1 ft
| Tide | Time | Height |
|---|---|---|
| High | 12:54 AM | 5.1 ft |
| Low | 6:12 AM | 1.7 ft |
| High | 12:32 PM | 6.1 ft |
| Low | 7:01 PM | −0.1 ft |
Best windows today
- Fishing5:00 to 8:00 PM
Today's best window (4:00 to 8:00 AM) has passed. Dawn light with the outgoing tide around the 6:12 AM low. Second window 5:00 to 8:00 PM.
- Tidepools & shelling6:00 to 7:00 PM
A minus tide, −0.1 ft at 7:01 PM. Rare ground is uncovered, go early.
- Surfing7:00 to 10:00 AM
Mid tide from 7:00 to 10:00 AM. No wind sensor at this station.
- Shallow boat launchAvoid 5:00 to 10:00 PM
Under 1.5 ft around low water. Launch before 5:00 PM.
Best windows tomorrow
- Fishing6:00 to 7:00 PM
Moving water near sunset, as the tide falls toward the 7:39 PM low.
- Tidepools & shelling6:00 to 7:00 PM
Today's lowest water is at 7:39 PM, before sunrise or after sunset. Best daylight window is 6:00 to 7:00 PM.
- Surfing7:00 to 10:00 AM
Mid tide from 7:00 to 10:00 AM. No wind sensor at this station.
- Shallow boat launchAvoid 5:00 to 10:00 PM
Under 1.5 ft around low water. Launch before 5:00 PM.
Next 7 days
October calendar →| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Range, ft |
|---|---|---|---|---|---|
| TodaySun 11 | H12:54a5.1 | L6:12a1.7 | H12:32p6.1 | L7:01p−0.1 | 6.1 spring tide |
| MonOct 12 | H1:46a4.9 | L6:48a2.3 | H1:00p6.0 | L7:39p−0.1 | 6.1 spring tide |
| TueOct 13 | H2:38a4.7 | L7:24a2.7 | H1:28p5.9 | L8:19p0.0 | 6.0 spring tide |
| WedOct 14 | H3:33a4.5 | L8:02a3.1 | H2:00p5.7 | L9:03p0.1 | 5.6 spring tide |
| ThuOct 15 | H4:35a4.3 | L8:47a3.5 | H2:38p5.5 | L9:52p0.3 | 5.2 |
| FriOct 16 | H5:46a4.2 | L9:46a3.7 | H3:25p5.2 | L10:50p0.5 | 4.7 |
| SatOct 17 | H7:02a4.2 | L11:14a3.7 | H4:24p5.0 | L11:56p0.6 | 4.3 |
Spring tides Sunday to Wednesday. Lows drop to −0.1 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 9414792.
Nearby stations
Currents
Alcatraz Island, 0.5 mile north of
- Slack2:14 AM
- Max ebb4:47 AM 1.4 kn
- Slack7:48 AM
- Max flood10:53 AM 2.0 kn
- Slack1:50 PM
- Max ebb4:48 PM 2.4 kn
- Slack9:09 PM
Current predictions for Alcatraz Island, 0.5 mile north of, 0.6 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
- 37.827° N, 122.417° W
- Time zone
- Pacific, UTC−7
- Station ID
- NOAA 9414792
About the tides at Alcatraz Island
Alcatraz Island 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 4.0 ft. Spring tides add a little more at both ends. The next spring tides peak today, with a range of 6.1 ft. Neap tides follow on October 18, when the range shrinks to 1.2 ft. In the next 12 months the highest predicted tide here is 7.2 ft on December 24, and the lowest is −1.8 ft on December 24.
Alcatraz Island is a subordinate station. NOAA predicts its tides by adjusting San Francisco, San Francisco Bay: highs come about 14 min and lows about 18 min later than there. The nearest other station is San Francisco, 1 mi away. For tidal currents, see Alcatraz Island, 0.5 mile north 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.