Marine Weather and Tide Forecast for Port Mansfield, TX

DISCUSSION
Issued at 1056 PM CST Fri Nov 6 2026

An upper level trough moving across the Southwest will increase forcing across South Texas over the weekend. Paired with southeasterly low-level flow advecting additional moisture into the region, this pattern will support increased rain chances into early next week. Rain chances are forecast to decrease by Monday night, with low rain chances lingering through much of the week.

Rain chances are forecast to increase from around 20-30% Saturday morning to 60-80% across the area Saturday night. Rainfall amounts are forecast to generally range from 1 to 2 inches, with isolated pockets of 2 to 3 inches possible Saturday. The Weather Prediction Center has all of Deep South Texas under a Marginal Risk of Excessive Rainfall Saturday.

The highest rainfall amounts are forecast to occur Sunday into Sunday night, with 24-hour totals of 1.5 to 3 inches forecast across most of Deep South Texas. Some isolated pockets of 4-5 inches may be possible. The Weather prediction Center has all of Deep South Texas under a Slight Risk of Excessive Rainfall Sunday.
Generally light to moderate rainfall rates are expected Sunday, though some isolated heavier rainfall is possible, which may result in isolated flash flooding.

Deep South Texas will once again find itself under a Marginal Risk of Excessive Rainfall Monday, with rain chances forecast to gradually decrease through the afternoon and evening, with rainfall amounts up to 1 inch forecast for Monday. Rain chances are forecast to gradually decrease through the day Monday, with daily low (20-30%) rain chances forecast to continue through Thursday.

AVIATION
(06Z TAFS)
Issued at 1056 PM CST Fri Nov 6 2026

Generally VFR conditions are forecast to continue overnight, though some brief periods of MVFR ceilings may be possible. Rain chances are forecast to increase around sunrise, which may result in MVFR to IFR conditions. Showers will remain possible through much of the day, with the highest probabilities occurring Saturday afternoon. Light and variable winds are forecast to become easterly at around 10 knots at BRO and HRL, while light northerly winds are forecast to continue at MFE.

MARINE
Issued at 1056 PM CST Fri Nov 6 2026

Generally favorable marine conditions are forecast to continue into the day Saturday, though showers and thunderstorms will be possible, with the highest rain chances over the Laguna Madre and along the coast. Winds and seas are forecast to increase Saturday night, likely resulting in adverse to hazardous conditions along the Lower Texas Coast. Small Craft Should Exercise Caution headline or Small Craft Advisories will likely be needed Saturday night through Sunday night.

Conditions are forecast to begin improving Monday, with generally favorable winds and seas forecast to continue through the remainder of the period.

PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 82 71 83 72 / 70 30 70 40 HARLINGEN 81 68 81 69 / 60 40 60 40 MCALLEN 83 70 83 71 / 50 30 60 60 RIO GRANDE CITY 81 66 79 66 / 60 20 50 70 SOUTH PADRE ISLAND 78 74 79 75 / 80 50 70 40 BAYVIEW/PORT ISABEL 80 70 81 71 / 70 40 60 40

BRO WATCHES/WARNINGS/ADVISORIES
TX...None.
GM...None.