Marine Weather and Tide Forecast for Port Mansfield, TX

DISCUSSION
Issued at 932 PM CST Mon Jan 19 2026

Two significant weather events will occur during the forecast period. The first will be in the Tuesday through Wednesday time frame, when a weak cold front, combined with a weak mid-level trough, will generate isolated to scattered showers and patches of rain, especially on Wednesday. The second event is anticipated for the weekend, when a robust cold front will sweep through Deep South Texas and the Rio Grande Valley. More significant chances of precipitation, the best in weeks, are forecast for Saturday and Sunday.

Temperature-wise, mild days and chilly nights will occur, with the first cold front not making much of an impact. However, this will abruptly end with the passage of the second cold front, with well below normal overnight lows and daytime highs forecast for the weekend. In fact, overnight lows for Saturday night and Sunday night may prompt the need for a Freeze Watch and subsequent Freeze Warning both nights. Additionally, if winds remain strong enough, wind chill may be a concern.

AVIATION
(06Z TAFS)
Issued at 1033 PM CST Mon Jan 19 2026

VFR will continue at the aerodromes through the next 24 hours, with generally light winds and partly to mostly cloudy skies.

MARINE
Issued at 932 PM CST Mon Jan 19 2026

Generally light to moderate winds and low to moderate seas will prevail along the Lower Texas Coast through much of the period with high pressure in control over the western Gulf of America.
Small Craft Advisory conditions are then anticipated for the weekend due to the Saturday passage of a robust cold front.
Improved marine conditions will occur at the start of the new work week.

PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 59 74 63 77 / 10 10 20 40 HARLINGEN 54 74 58 76 / 0 10 20 40 MCALLEN 58 74 61 77 / 0 10 30 30 RIO GRANDE CITY 55 72 59 77 / 0 10 40 30 SOUTH PADRE ISLAND 63 71 66 72 / 10 10 30 50 BAYVIEW/PORT ISABEL 58 73 61 75 / 0 10 20 50

BRO WATCHES/WARNINGS/ADVISORIES
None.