Predictions: NOAA CO-OPS station 8771341 — heights relative to MLLW.

Harmonic prediction from the official tide authority. Very high accuracy under normal conditions; storm surge may shift actual water level. Not for navigation.

Predictions: NOAA CO-OPS station 8771341 — heights relative to MLLW. · Not for navigation.

The angler tradition that rates each day for fish-bite likelihood using moon transits and rise/set. One to five stars, not a scientific forecast.

• Mon
  ★★★★★
• Tue
  ★★★★★
• Wed
  ★★★★★
• Thu
  ★★★★★
• Fri
  ★★★★★
• Sat
  ★★★★★
• Sun
  ★★★★★

Next spring tide on Sat 02 May (range 0.6m / 2.1ft). Last neap on Sun 26 Apr. Next neap on Mon 11 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Galveston sits at the mouth of Galveston Bay on the upper Texas Gulf Coast — a 50 km long barrier-island city that takes the brunt of Gulf weather and protects the inner bay system from the open ocean. The tide signature here is Gulf-of-Mexico small and Gulf-of-Mexico strange. Mean range at the Bay Entrance gauge on the North Jetty is about 0.4 metres, primarily diurnal, which means most days produce one clear high and one clear low rather than the four-extrema pattern of the Atlantic coast. A smaller secondary high or low shows up some days but often barely registers above the noise. The North and South Jetties at the bay entrance concentrate the exchange between the bay and the open Gulf, and the current through Bolivar Roads can run sharper than the small height swing implies — fishers anchored in the channel time their drifts to the change of tide. Surfers on the West End and at San Luis Pass read the table for low-tide bar reshaping. The geometry of the long barrier island and the shallow bay mean that hurricane storm surge can dwarf the astronomical signal completely — Hurricane Ike in 2008 ran a peak surge close to 5 metres above predicted tide level along this coast, and the historical 1900 storm killed several thousand people on Galveston Island. NOAA CO-OPS station 8771341 provides the harmonic predictions on this page; for tropical-storm threats the National Hurricane Center is the authoritative real-time source.