Baffin Bay to Port Mansfield, TX Marine Forecast
| Today...Southeast Winds 5 To 10 Knots, Becoming East This Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Tonight...Southeast Winds 5 To 10 Knots, Becoming South Early In The Morning. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Saturday...Southeast Winds Around 5 Knots, Becoming Northeast In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. |
| Saturday Night...East Winds Around 10 Knots, Becoming Southeast After Midnight. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 5 Seconds. A Slight Chance Of Showers Early In The Morning. |
| Sunday...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 5 Seconds. A Slight Chance Of Showers And Thunderstorms Until Late Afternoon. |
| Sunday Night...Southeast Winds Around 10 Knots, Becoming South Early In The Morning. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. |
| Monday...Southeast Winds 5 To 10 Knots, Increasing To 10 To 15 Knots Late In The Afternoon. Seas 2 To 3 Feet. |
| Monday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. |
| Tuesday...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. |
| Tuesday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion ...UPDATED National Weather Service Brownsville TX 1230am CDT Fri August 7 2026 Issued at 1035pm CDT Thu August 6 2026 Mid/upper level shortwaves riding along the ridge of a high pressure aloft, centered over the 4 Corners region, help to increase cloud cover and chances of afternoon and early evening seabreeze boundary showers and thunderstorms over the weekend. Although pulses of Gulf moisture associated with, and behind, the seabreeze could push PWAT (Precipitable Water) values to 2.0+ in. at times, mid-levels may struggle a bit more to moisten, due to influence of nearby high pressures; convection may remain fairly isolated, scattered at best, and brief in nature. Nonetheless, chances of rain increase, generally along and east of US-281, from a low (15-20%) chance on Friday and a low (10-15%) chance on Saturday to a low to medium (20-40%) chance on Sunday. The highest chances are anticipated to be across the Lower RGV, where the influence of troughing aloft and higher moisture content remain the most supportive. Brief periods of isolated heavy rain, frequent lightning and some higher gusts are still possible. Additionally, increasing cloud cover is expected to cool temperatures by a few degrees throughout the weekend, resulting in inland high temperatures mostly in the mid/upper 90s while lower 100s become limited to the Rio Grande Plains and the Upper RGV. Yet, relatively sunnier skies and humid conditions on Friday may result in a SPS being issued later tonight or Friday morning for inland portions of Kenedy and Willacy counties, where Friday afternoon and early evening heat indices could reach 108-111 F. Otherwise, mostly moderate heat risks on Friday slightly improve to a minor to moderate risk across the Northern Ranchlands on Saturday and Sunday while the Rio Grande Valley and Rio Grande Plains maintain a moderate heat risk. By Sunday night, another expanding and building area of high pressure aloft over the northeastern Gulf is forecast to suppress cloud and convection development, thus leading to drier conditions, with widespread lower/mid 100s and moderate heat risks returning to most inland areas by Monday afternoon, when SPS become likely again for heat indices of 108-111+ F. Heat advisories are possible as well, particularly by the middle to later parts of next week, as a tightening pressure gradient enhances moisture content via stronger southeasterly winds, possibly gusting to 25-35+ mph, causing heat indices to warm further, and heat risks to deteriorate to major, with pockets of extreme heat risks. A medium risk of life-threatening rip currents continues through tonight, becoming a low risk Friday morning through Friday afternoon. Marine Issued at 1035pm CDT Thu August 6 2026 Gentle to moderate easterly to southeasterly winds and slight to moderate (1-3 ft) seas become moderate to fresh southeasterly winds, with moderate (3-5 ft) seas and periods of Small Craft Exercise Caution conditions by next Monday as a pressure gradient tightens across the Lower Texas coastal waters. Chances of rain with embedded thunderstorms increase from as much as a low (20%) chance on Friday afternoon to as much as a medium (60%) chance on Saturday and Sunday before diminishing to less than a 10% chance by next Monday. NOAA Brownsville TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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