Marine Weather and Tide Forecast for Austin, TX

SHORT TERM
(Tonight through Wednesday night)
Issued at 1231 PM CDT Tue Aug 4 2026

Latest satellite pictures as of 12:30 PM CDT, are showing cumulus clouds across most of the Coastal Plains and parts of the Rio Grande Plains. As the day progresses, some of these clouds are forecast to dissipate to give way to mostly sunny/sunny skies across South Central Texas. By late afternoon, clouds are forecast to develop along the sea breeze as it moves to the northwest.
Hires models are suggesting a few showers and even a storm or two developing over parts of the I-35 corridor and parts of the Rio Grande Plains late afternoon through early evening (where a stronger low level jet over this area may help this activity). So, I went ahead and added low PoPs to cover that probability. When looking at the model forecast soundings, they show an inverted V-shaped suggesting mid level dry air down to the surface with DCAPE values over 1000 J/kg. If a storm manages to develop under this environment, strong wind gusts of 40 mph or so could occur along with a heavy downpour. Then later tonight into Wednesday morning, clouds develop through the period with light southeast to south winds. Overnight lows are forecast to range from the low to upper 70s. With dewpoints in the mid 70s along and east of the I-35 corridor by daybreak and some models showing patchy fog for few hours, I went with it.

Clouds dissipate late morning into early afternoon on Wednesday with highs projected to reach the low to upper 90s across most areas in South Central Texas and up to 103 over the southern portion of the Rio Grande Plains. Wednesday's upper level setup looks favorable for a rain-free day, however, a few seabreeze showers along the middle Texas coast is a good bet.

LONG TERM
(Thursday through next Tuesday)
Issued at 1231 PM CDT Tue Aug 4 2026

Continued dry and hot for the extended forecast period including the upcoming weekend. The subtropical ridge keeps the control of the local weather for the long term time frame. However, there is a low chance of showers and even a storm or two across portions of the Coastal Plains including areas along and east of Highway 77 each afternoon from Thursday into the weekend as a stronger seabreeze forms and develops convection along it.

AVIATION
(18Z TAFS)
Issued at 1231 PM CDT Tue Aug 4 2026

MVFR cigs across the region have been slow to erode this morning, but are finally scattering out at this hour. MVFR cigs will likely hold on at DRT for another 30-60 minutes before fully scattering out. Expect scattered VFR cigs through the afternoon, with likely SKC tonight , but pockets of MVFR stratus will likely return early Wednesday morning. Stratus coverage looks to be lower than this morning and have addressed the stratus potential with a mention of a SCT-MVFR category starting around 10Z. Any MVFR cigs will be slower to reach DRT later in the morning.

Hi-resolution short term models are picking up on the potential for isolated thunderstorms along the I-35 corridor this afternoon.
Although confidence is low, felt the convective potential was enough to include a PROB30 at the Austin and San Antonio airports from 22- 01Z. It's possible that limited instability may result in more shower activity but considering the hot environment, felt -TSRA is warranted at this time.

PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 77 98 76 97 / 20 0 0 0 Austin Bergstrom Intl Airport 77 98 76 98 / 20 0 0 0 New Braunfels Muni Airport 76 98 75 98 / 0 0 0 0 Burnet Muni Airport 74 96 73 96 / 0 0 0 0 Del Rio Intl Airport 78 99 78 100 / 0 0 10 0 Georgetown Muni Airport 76 97 75 97 / 0 0 0 0 Hondo Muni Airport 75 97 75 97 / 0 0 0 0 San Marcos Muni Airport 76 99 76 99 / 0 0 0 0 La Grange - Fayette Regional 76 99 76 98 / 0 0 0 10 San Antonio Intl Airport 77 98 77 98 / 0 0 0 0 Stinson Muni Airport 77 99 77 99 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES
None.