Port Mansfield, TX to the Rio Grande River 20 - 60 NM Marine Forecast
| Today...Northeast Winds 15 To 20 Knots, Increasing To 20 To 25 Knots With Gusts Up To 30 Knots This Afternoon. Seas 4 To 6 Feet, Occasionally To 8 Feet, Building To 6 To 9 Feet, Occasionally To 11 Feet This Afternoon. Wave Detail: Northeast 6 Feet At 6 Seconds, Becoming Northeast 9 Feet At 8 Seconds And Southwest 3 Feet At 6 Seconds. A Slight Chance Of Showers Until Late Afternoon, Then A Chance Of Showers Late This Afternoon. |
| Tonight...North Winds 20 To 25 Knots With Gusts Up To 35 Knots. Seas 8 To 10 Feet, Occasionally To 13 Feet. Wave Detail: Northeast 10 Feet At 8 Seconds. A Chance Of Showers Early In The Evening, Then A Slight Chance Of Showers Late In The Evening. |
| Sunday...North Winds 20 To 25 Knots With Gusts Up To 30 Knots, Diminishing To 10 To 15 Knots. Seas 6 To 9 Feet, Occasionally To 11 Feet, Subsiding To 4 To 6 Feet, Occasionally To 8 Feet In The Afternoon. Wave Detail: Northeast 8 Feet At 7 Seconds, Becoming Northeast 6 Feet At 7 Seconds. |
| Sunday Night...Northeast Winds 5 To 10 Knots, Becoming Southeast In The Late Evening And Overnight. Seas 3 To 4 Feet. Wave Detail: Northeast 4 Feet At 7 Seconds. |
| Monday...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. Wave Detail: East 3 Feet At 7 Seconds. |
| Monday Night...East Winds 10 To 15 Knots. Seas 3 To 4 Feet. Wave Detail: East 3 Feet At 5 Seconds. |
| Tuesday...East Winds Around 15 Knots. Seas 3 To 5 Feet. A Slight Chance Of Showers In The Morning, Then A Chance Of Showers In The Afternoon. |
| Tuesday Night...Southeast Winds Around 15 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. A Chance Of Showers. |
| Wednesday...South Winds 10 To 15 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Showers Likely. A Slight Chance Of Thunderstorms In The Afternoon. |
| Wednesday Night...South Winds 10 To 15 Knots, Becoming Southwest Early In The Morning. Seas 5 To 7 Feet, Occasionally To 9 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Brownsville TX 1116pm CST Fri Jan 16 2026 Issued at 1110pm CST Fri Jan 16 2026 A deep upper level trough over the eastern US will support a cold front moving south through Deep South Texas tonight. This front will bring cooler temperatures to the area this weekend, as well as low to moderate rain chances Saturday. Agreement between models has increased over the past several runs, increasing confidence in the temperature forecast this weekend. High temperatures Saturday and Sunday will likely remain in the 60s across the area. Low temperatures Saturday night / Sunday morning will likely range from the low 30s in the northwestern portions of the CWA (County Warning Area) to the low 40s in the Lower Rio Grande Valley. Temperatures may briefly drop below freezing Sunday morning across portions of Zapata, Brooks, and Jim Hogg counties. Gusty northeasterly winds over the Gulf waters this weekend will likely lead to hazardous beach conditions this weekend. Increased rip current strength and activity, as well as increased surf height will likely warrant a High Surf Advisory and High Risk of Rip Currents statement this weekend. Gusty northeasterly winds and dry air in the wake of the front will present an elevated risk for erratic wildfire behavior Saturday afternoon. Southeasterly winds look to return to the area Sunday evening, allowing for gradually warmer temperatures next week. High temperatures will likely return to the 70s Monday and may reach into the low 80s by the later half of the week. A shortwave trough moving across the southern US and Northern Mexico midweek will likely bring another chance of rain to the area Tuesday and Wednesday, with rain chances increasing to around 30-40%. Another cold front may approach the area near the end of the forecast, though confidence in the timing and southern extent of this front remains low. Marine Issued at 1110pm CST Fri Jan 16 2026 A Small Craft Advisory is in effect from 5am Saturday until 9 AM Sunday for the Gulf waters and the Laguna Madre. Strong northeasterly winds in the wake of the cold front Saturday morning will likely build seas to 7-10 feet Saturday. Winds and seas will begin to subside Sunday, though a Small Craft Should Exercise Caution headline will likely be needed after the Small Craft Advisory expires. Generally favorable conditions are forecast to return by Monday. Another round of adverse marine conditions may be possible midweek. Fire Weather Issued at 1110pm CST Fri Jan 16 2026 The combination of dry air and gusty northeasterly winds in the wake of the cold front Saturday will pose an elevated risk for fire weather across northern portions of the CWA. Confidence is high for afternoon relative humidity values ranging from 15-25 % for portions of Zapata, Jim Hogg, Brooks and Inland Kenedy counties. 20 foot wind speeds will likely be borderline Fire Danger Statement criteria across much of this area, though gusts above criteria will be likely through the afternoon. Additionally, dry fuels in the area will further support the potential for elevated fire weather Saturday. Given these factors, a Fire Danger Statement is in effect from noon until 6pm Saturday. While relative humidity values look to be lower Sunday, confidence is higher in wind speeds remaining below criteria, so a Fire Danger Statement likely won’t be needed. NOAA Brownsville TX Office: Watches - Warnings - Advisories TX...None. GM...Small Craft Advisory from 5am Saturday to 9am CST Sunday for GMZ130-132-135-150-155-170-175. |
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