Galveston Bay Marine Forecast
| This Afternoon...Southeast Winds 5 To 10 Knots. Bay Waters Smooth. A Slight Chance Of Showers And Thunderstorms Late. |
| Tonight...South Winds 5 To 10 Knots, Becoming West After Midnight. Bay Waters Smooth. A Chance Of Showers With A Slight Chance Of Thunderstorms In The Evening. |
| Saturday...North Winds Around 5 Knots, Becoming Southeast In The Afternoon. Bay Waters Smooth. |
| Saturday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Sunday...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Sunday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Monday...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Monday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. |
| Tuesday...South Winds 5 To 10 Knots. Bay Waters Smooth. A Chance Of Showers And Thunderstorms. |
| Tuesday Night...South Winds 5 To 10 Knots. Bay Waters Smooth. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Houston/Galveston TX 1249pm CDT Fri August 28 2026 .SHORT TERM... (This afternoon through Saturday Night) Issued at 1248pm CDT Fri August 28 2026 Water vapor imagery and GOES derived PW imagery indicate the presence of drier mid level air spreading in from the north in the wake of a weak disturbance moving into Louisiana. This should continue into the afternoon, however an axis of higher theta-e air resides along and south of I-10 currently and this is expected to remain in place into the evening hours. While weak forcing for ascent associated with the disturbance will likely be present into the afternoon, additional convection will largely be driven by low level moisture convergence during peak afternoon heating. Forecast soundings are similar to yesterday with weak deep layer wind fields and steep low level lapse rates. This will support an isolated strong wind threat with any storms this afternoon and evening. Locally heavy rainfall will also be a threat although storm motions should be sufficiently fast to inhibit a more substantial threat for flooding. Coverage of showers and storms will diminish after dark with continued northerly flow aloft shunting better moisture farther south, although some offshore convection may continue through the overnight hours. A notable drop in deep layer moisture content is forecast for Saturday, particularly north of I-10 and additional convective chances will be tied to the sea breeze where Probability of Precipitation will generally be 20% or less. High temperatures will typically run in the mid/upper 90s inland with lower 90s along the coast both this afternoon and again Saturday. Slightly drier air north of I-10 will keep heat indices around 105 both days. Dunn Long Term (Sunday through next Thursday) Issued at 1248pm CDT Fri August 28 2026 The latter half of the weekend will continue to feature relatively warm and humid conditions as mid level ridging over West Texas expands eastward. Afternoon convective chances will be largely tied to the sea breeze with Probability of Precipitation 10-20% on Sunday and Monday. An upper level disturbance will undercut the southern periphery of the expanding ridge early next week as deep layer moisture increases again. This should result in an uptick in coverage of afternoon showers/storms, particularly on Tuesday and Wednesday. No significant deviations in afternoon highs/heat indices are expected through the middle of next week with readings in the mid/upper 90s and heat index values around 105 degrees. Dunn Marine Issued at 1248pm CDT Fri August 28 2026 Sporadic afternoon convection is expected across the offshore waters today and again on Saturday with southerly winds generally 10 kt or less outside of convective areas. Onshore flow 5-10 kt is expected to continue through the weekend and into next week with low chances for showers and thunderstorms. Seas will generally run 1 to 3 feet through the period although strengthing winds and locally higher seas are expected toward the middle part of next week. Dunn NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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