Galveston Bay Marine Forecast
| Today...East Winds 10 To 15 Knots. Bay Waters Slightly Choppy. A Slight Chance Of Showers This Afternoon. |
| Tonight...East Winds 10 To 15 Knots, Diminishing To Around 10 Knots After Midnight. Bay Waters Slightly Choppy, Diminishing To Smooth After Midnight. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers With A Slight Chance Of Thunderstorms After Midnight. |
| Saturday...East Winds 5 To 10 Knots. Bay Waters Smooth. A Chance Of Showers In The Morning, Then Showers Likely With A Chance Of Thunderstorms In The Afternoon. |
| Saturday Night...East Winds 5 To 10 Knots. Bay Waters Smooth. |
| Sunday...Northeast Winds 5 To 10 Knots. Bay Waters Smooth. |
| Sunday Night...East Winds Around 5 Knots. Bay Waters Smooth. |
| Monday...East Winds Around 10 Knots, Becoming Southeast 10 To 15 Knots In The Afternoon. Bay Waters Smooth, Increasing To Slightly Choppy In The Afternoon. |
| Monday Night...Southeast Winds 10 To 15 Knots. Bay Waters Slightly Choppy. |
| Tuesday...South Winds 10 To 15 Knots, Diminishing To Around 10 Knots In The Afternoon. Bay Waters Slightly Choppy, Diminishing To Smooth In The Afternoon. A Chance Of Thunderstorms. A Chance Of Showers In The Morning, Then Showers In The Afternoon. |
| Tuesday Night...Southwest Winds Around 10 Knots, Becoming Northwest 10 To 15 Knots After Midnight. Bay Waters Smooth, Increasing To Slightly Choppy After Midnight. A Chance Of Showers In The Evening. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Houston/Galveston TX 552am CDT Fri Oct 30 2026 Issued at 1145pm CDT Thu Oct 29 2026 A parade of mid-level shortwave/vort maxima embedded in the southwesterly flow aloft will continue to move north-northeast across central TX tonight. While some drier air persists at the 700:850 hPa layer, a few light/spotty showers will be possible over the Brazos Valley and southwestern counties. PW values (Precipitable Water values) will be on the increase from southwest to northeast today and Saturday, with values peaking in the 1.6 to 2.0 inch range. Increasing moisture, combined with passing mid-level shortwaves will keep rain chances in the forecast. The best chances remain for areas west of I-45 and south of I-10, mainly in the afternoon due to the combination of peak daytime heating. Showers and a few thunderstorms will increase in coverage late tonight into Saturday as the enhanced area of increased moisture and vort maxes move overhead and to our northeast. This scattered to widespread activity should gradually diminish by early evening, so the evening trick-or-treating forecast looks rain-free for most areas. A weak mid to upper level ridge builds Sunday into Monday, resulting in only slight rain chances and warmer conditions with highs in the mid to upper 80s. A deepening upper trough will move over the western CONUS over the weekend, moving eastward across the Plains on Monday. While the evolution of this system still differs run to run, guidance shows better agreement on the timing of the associated surface cold front. As of the latest analysis, the FROPA is forecast to move through on Tuesday, reaching the coastal waters Tuesday night into Wednesday. Given the high uncertainty in the evolution and phasing of this trough, confidence in specific details regarding any thunderstorm/severe weather potential remains low. Will continue to monitor over the weekend as more hi-res guidance arrives and clearer details emerge with the forecast. Behind the FROPA, drier and slightly cooler conditions will filter in with near-normal temperatures for this time of year. JM Marine Issued at 1145pm CDT Thu Oct 29 2026 Light to occasionally moderate easterly to southeasterly flow and seas in the 2 to 4 ft range will continue across the Upper TX coast today and Saturday. A few passing disturbances will result in isolated to scattered showers and thunderstorms through the weekend, with the best chances late tonight into Saturday. Winds will become more southeasterly early next week, before the arrival of the next cold front sometime in the Tuesday to Wednesday time frame. Will continue to monitor conditions next week as elevated winds and building seas will be possible ahead of and along the FROPA. Caution flags or Small Craft Advisories may be needed. JM NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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