Heights in feet above Mean Lower Low Water (MLLW). Dots are NOAA's predicted highs and lows; the line between them is our interpolation. Shaded: night.
| Tide | Time | Height |
|---|---|---|
| High tide | 2:35 AM | 8.22 ft |
| Low tide | 8:14 AM | 2.82 ft |
| High tide | 1:29 PM | 11.03 ft |
| Low tide | 9:15 PM | -1.18 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 2:35 AM 8.2 ft1:29 PM 11.0 ft | 8:14 AM 2.8 ft9:15 PM -1.2 ft |
| Tomorrow Wed, Oct 28 | 3:33 AM 8.1 ft2:10 PM 11.1 ft | 8:57 AM 3.2 ft10:05 PM -1.3 ft |
| Thu, Oct 29 | 4:35 AM 7.9 ft2:57 PM 10.8 ft | 9:45 AM 3.6 ft11:00 PM -1.1 ft |
| Fri, Oct 30 | 5:41 AM 7.7 ft3:53 PM 10.4 ft | 10:45 AM 3.8 ft |
| Sat, Oct 31 | 6:49 AM 7.7 ft4:58 PM 9.7 ft | 12:02 AM -0.8 ft12:03 PM 3.9 ft |
| Sun, Nov 1 | 6:54 AM 8.0 ft5:13 PM 9.0 ft | 1:09 AM -0.5 ft12:37 PM 3.7 ft |
| Mon, Nov 2 | 7:49 AM 8.3 ft6:35 PM 8.4 ft | 1:17 AM -0.2 ft2:04 PM 3.1 ft |
Orange: measured by NOAA's sensor, last 24 hours (6-minute data, preliminary). Dashed: predicted tide, through the next 24 hours. The prediction contains only the astronomical tide; wind, air pressure and river flow move the real water level away from it.
Upper Guadalupe Slough is a subordinate station: NOAA computes its tides from San Francisco (Golden Gate) with fixed time and height corrections.
All California tide stations →
On Tuesday, October 27, high tide at Upper Guadalupe Slough is at 2:35 AM (8.2 ft) and 1:29 PM (11.0 ft); low tide is at 8:14 AM (2.8 ft) and 9:15 PM (-1.2 ft) (PDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 12.0 ft on December 24, 2026 at 11:51 AM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.
Yes — on 186 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -2.1 ft on December 24, 2026 at 7:55 PM. Minus tides expose the most shoreline, which is why tide-poolers look for them.
Station local time (PDT at the time this page was built), with daylight saving time applied where the area observes it — the same convention as NOAA's own tide tables.
From NOAA CO-OPS, the U.S. government tide station network (tidesandcurrents.noaa.gov); the predictions are public domain. Upper Guadalupe Slough is a subordinate station: NOAA derives its times and heights from the reference station San Francisco (Golden Gate) with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.