Galveston Bay Marine Forecast
| Rest Of Tonight...Southeast Winds 10 To 15 Knots, Becoming East Around 10 Knots. Bay Waters Slightly Choppy, Diminishing To Smooth. |
| Friday...East Winds 10 To 15 Knots. Bay Waters Slightly Choppy. |
| Friday Night...Southeast Winds 10 To 15 Knots, Diminishing To Around 10 Knots After Midnight. Bay Waters Slightly Choppy, Diminishing To Smooth After Midnight. |
| Saturday...East Winds 5 To 10 Knots. Bay Waters Smooth. |
| Saturday Night...Southeast Winds 5 To 10 Knots. Bay Waters Smooth. |
| Sunday...Southeast Winds Around 5 Knots, Increasing To 5 To 10 Knots In The Afternoon. Bay Waters Smooth. |
| Sunday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Monday...Southeast Winds 5 To 10 Knots. Bay Waters Smooth. |
| Monday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Tuesday...North Winds Around 5 Knots, Becoming East In The Afternoon. Bay Waters Smooth. |
| Tuesday Night...Southeast Winds 5 To 10 Knots. Bay Waters Smooth. |
| Area Forecast Discussion National Weather Service Houston/Galveston TX 547pm CDT Thu September 17 2026 Issued at 1207pm CDT Thu September 17 2026 The well-advertised tropical moisture plume has arrived and associated showers and thunderstorms are currently moving onshore. These should peak in coverage late this morning into afternoon, with highest chances along the coast and south of I-10. Heavy downpours are the main threat, so use caution if traveling. That all said, given the increased capping/subsidence with the strong upper ridge moving westward this afternoon, the more "scary" looking CAMs may not necessarily verify. In any case, storms will gradually taper off through the evening. The ridge will usher in drier air overnight into Friday. We will see a brief reprieve from the humidity with heat indicies staying below 100. With the dry air and capping from the ridge, precipitation is not expected anywhere, even along the coast. Similar conditions will prevail Saturday as the ridge remains in place between two troughs on either side of it. The ridge will begin to slightly weaken Sunday and the higher humidities will return albeit slightly lower than values that lead to recent Heat Advisories. Nonetheless they will still generally range from 102-105F. Precipitation chances should remain minimal. This large-scale pattern will remain in place through much of next week, with no significant systems on the horizon. Except hot temperatures, humidity, and diurnal convection to persist each day. Marine Issued at 1207pm CDT Thu September 17 2026 Easterly sustained winds near 20 kts will continue through around midnight tonight. They will remain breezy through Friday at 15-20 kts, before becoming light on Saturday and eventually veering to the southeast. Seas of 4 to 6 ft will continue through Friday morning before subsiding to 3 to 5 ft into Saturday morning and further subsiding to 2 to 3 ft thereafter. Showers and thunderstorms remain likely through today along the coast and over offshore waters. Drier air Friday into the weekend will significantly curtail any additional chances, though some will remain offshore. NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories TX...None. GM...Small Craft Should Exercise Caution until 1am CDT Friday for GMZ350-355-370-375. |
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