Rollover Pass water level
NOAA tide gauge 8770971 · Galveston County · Houston–Galveston
water level relative to MHHW (an ordinary high tide) · Oct 23, 2026 at 9:54 PM CDT · 11 minutes ago
- Below NWS minor coastal flood threshold
- 1.5 ft
- NWS coastal flood threshold (minor)
- +2.16 ft
- NWS coastal flood threshold (moderate)
- +3.16 ft
- NWS coastal flood threshold (major)
- +3.67 ft
- Highest observed (NOAA)
- +4.92 ft (July 9, 2024)
- Highest astronomical tide
- +0.72 ft
- Usual range
- -0.12 to +1.57 ft
NOAA marks recent readings as preliminary: they can be revised after review.
Last 7 days
Hourly averages of NOAA's six-minute readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.
How to read this gauge
The number is the observed water level relative to mean higher high water (MHHW), the average height of the higher of each day's two high tides at this station. 0 ft is an ordinary high tide; +1 ft is a foot higher than that. It is the water surface, not a depth, and it includes the tide and anything on top of it: storm surge, wind pushing water in or out, river flow.
The NWS coastal flood thresholds are the National Weather Service's references for this station: water at or above the minor level is where flooding of low-lying areas begins. They describe the station, not any particular street or property. This site shows readings only, never tide predictions.
Daily highs and lows since September 11, 2026
In past storms
| Storm | Peak | Peak time | Against flood thresholds |
|---|---|---|---|
| October 1–2, 2026 | +2.25 ft | Oct 2, 2026 at 7:06 AM CDT | at or above NWS minor |
Other tide gauges in Houston–Galveston
| Tide gauge | Water level | Against flood thresholds | Updated |
|---|---|---|---|
| Eagle Point, Galveston Bay | +0.64 ft | 2.2 ft below NWS minor | 11 minutes ago |
| Freeport Harbor | +0.00 ft | 2.2 ft below NWS minor | 11 minutes ago |
| Galveston Bay Entrance, North Jetty | +0.02 ft | 1.8 ft below NWS minor | 11 minutes ago |
| Galveston Pier 21 | +0.10 ft | 2.5 ft below NWS minor | 11 minutes ago |
| Galveston Railroad Bridge | +0.19 ft | 2.2 ft below NWS minor | 11 minutes ago |
| High Island | +0.63 ft | 2.5 ft below NWS minor | 11 minutes ago |
| Manchester | +0.33 ft | 1.7 ft below NWS minor | 11 minutes ago |
| Morgans Point, Barbours Cut | +0.36 ft | 2.1 ft below NWS minor | 11 minutes ago |
| San Luis Pass | +1.13 ft | 1.6 ft below NWS minor | 3 days ago |
Download the readings
rollover-pass.csv (CSV): every six-minute reading from the last 90 days, 10,143 rows, with time in UTC and Central, water level in feet relative to MHHW, and NOAA's quality flag (p preliminary, v verified).
rollover-pass-daily.csv (CSV): the low and high of every day since September 11, 2026.
Source. Water levels, datums, thresholds and the record from NOAA Tides & Currents (CO-OPS); coastal flood thresholds from the National Weather Service. This site is not affiliated with either.