Galveston Bay Marine Forecast
| This Afternoon...South Winds Around 15 Knots, Increasing To 15 To 20 Knots Late. Bay Waters Slightly Choppy, Increasing To Choppy Late. A Chance Of Showers And Thunderstorms Early, Then A Slight Chance Of Showers And Thunderstorms Late. |
| Tonight...South Winds 15 To 20 Knots With Gusts Up To 25 Knots. Bay Waters Choppy. |
| Monday...South Winds 15 To 20 Knots. Bay Waters Choppy. |
| Monday Night...South Winds 10 To 15 Knots With Gusts Up To 20 Knots. Bay Waters Slightly Choppy. |
| Tuesday...South Winds 10 To 15 Knots. Bay Waters Slightly Choppy. |
| Tuesday Night...South Winds 10 To 15 Knots. Bay Waters Slightly Choppy. |
| Wednesday...Southwest Winds Around 10 Knots, Becoming South 10 To 15 Knots In The Afternoon. Bay Waters Smooth, Increasing To Slightly Choppy In The Afternoon. |
| Wednesday Night...South Winds 10 To 15 Knots. Bay Waters Slightly Choppy. |
| Thursday...South Winds Around 10 Knots, Increasing To 10 To 15 Knots In The Afternoon. Bay Waters Smooth, Increasing To Slightly Choppy In The Afternoon. |
| Thursday Night...South Winds 10 To 15 Knots. Bay Waters Slightly Choppy. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Houston/Galveston TX 644pm CDT Sunday Jun 21 2026 Issued at 120pm CDT Sunday Jun 21 2026 After days of active weather, we're finally beginning to see the end of precipitation for a few days. Earlier showers and thunderstorms have all but dissipated, with a few lingering showers moving eastward and out of our area. The weak boundary and surface low that generated the convection seem to have weakened and drifted south as ridging builds in from the west. Clouds will linger for a few more hours, keeping temps from warming too much, the exception being our far northwest areas. Being the longest day of the year, though, we'll have enough time for highs to warm into the mid 80s. Upper ridging will dominate the weather pattern through much of the work work, with mid and upper level flow becoming more zonal. This will cut us off from the deep layer moisture that's been in place, with drier air working it's way in. We'll go from nearing the climatological max for PWs last week to nearing the 25th percentile next week. Given the lower moisture and subsidence, have kept very low Probability of Precipitation in the forecast. Unfortunately, hot conditions will also persist under the ridge, with highs climbing into the mid 90s next week. Dewpoints will lessen and overnight lows will fall into the mid 70s, so a slight reprieve from the more oppressive heat. That said, heat indices will climb into the triple digits, but should stay below heat advisory criteria, except for maybe a few isolated spots. Marine Issued at 120pm CDT Sunday Jun 21 2026 Moderate onshore flow will persist through Monday morning, followed by light to moderate onshore flow from midweek onward. Seas of 3 to 6 feet are expected through Monday. NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories TX...High Rip Current Risk through Monday evening for TXZ436>439. GM...Small Craft Should Exercise Caution through Monday afternoon for GMZ330-335-350-355-370-375. |
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