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Marine Weather and Tide Forecast for Port Isabel, TX

June 14, 2025 3:45 PM CDT (20:45 UTC)
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Sunrise 6:36 AM   Sunset 8:24 PM
Moonrise 10:29 PM   Moonset 8:26 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
GMZ130 Laguna Madre From The Port Of Brownsville To The Arroyo Colorado- Laguna Madre From The Arroyo Colorado To 5 Nm North Of Port Mansfield Tx- Laguna Madre From 5 Nm North Of Port Mansfield To Baffin Bay Tx- 118 Pm Cdt Sat Jun 14 2025

Tonight - Southeast winds 10 to 15 knots, becoming around 10 knots early this morning. A moderate chop on the bay, diminishing to light chop early this morning. A slight chance of showers and Thunderstorms early this morning.

Sunday - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of Thunderstorms in the morning. A chance of showers. A chance of Thunderstorms in the afternoon.

Sunday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers and Thunderstorms early in the evening. A slight chance of showers after midnight. A slight chance of Thunderstorms early in the morning.

Monday - Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers. A slight chance of Thunderstorms early in the morning, then a chance of Thunderstorms in the afternoon.

Monday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of showers and Thunderstorms early in the evening. A slight chance of showers early in the morning.

Tuesday - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers early in the morning, then a slight chance of showers and Thunderstorms in the afternoon.

Tuesday night - Southeast winds 10 to 15 knots. A moderate chop on the bay.

Wednesday - Southeast winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Choppy on the bay. A slight chance of showers and Thunderstorms.

Wednesday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of Thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight.

Thursday - Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of Thunderstorms. Showers likely.

Thursday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. A chance of Thunderstorms in the evening. Showers likely. A slight chance of Thunderstorms after midnight.
winds and waves higher in and near Thunderstorms.
GMZ100 118 Pm Cdt Sat Jun 14 2025

Synopsis - Moderate winds and seas are expected through tonight, with improving conditions for Sunday into Monday night. Weather pattern becomes increasingly unsettled as we head into middle of next week, with more unsettled heading into middle of next week with 10-30 percent chance for showers and Thunderstorms Monday into Tuesday, increasing to 30-50 percent for Wednesday into Friday. As the surface pressure gradient tightens mid to late next week, small craft exercise caution and small craft advisory conditions could potentially be reached.

7 Day Forecast for Marine Location Near Port Isabel, TX
   
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Tide / Current for Port Isabel, Texas
  
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Port Isabel
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Sat -- 06:36 AM CDT     Sunrise
Sat -- 09:26 AM CDT     Moonset
Sat -- 10:26 AM CDT     1.49 feet High Tide
Sat -- 08:22 PM CDT     Sunset
Sat -- 11:29 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Port Isabel, Texas does not exist in database. Press Edit above and select a valid nearby location.

Port Isabel, Texas, Tide feet
12
am
-0.6
1
am
-0.5
2
am
-0.3
3
am
0
4
am
0.4
5
am
0.7
6
am
1
7
am
1.2
8
am
1.4
9
am
1.5
10
am
1.5
11
am
1.5
12
pm
1.5
1
pm
1.4
2
pm
1.3
3
pm
1.3
4
pm
1.1
5
pm
1
6
pm
0.8
7
pm
0.6
8
pm
0.3
9
pm
0
10
pm
-0.2
11
pm
-0.4

Tide / Current for Matamoros, Tamaulipas, Mexico
  
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Matamoros
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Sat -- 05:38 AM CST     Sunrise
Sat -- 08:28 AM CST     Moonset
Sat -- 08:38 AM CST     1.38 feet High Tide
Sat -- 07:22 PM CST     Sunset
Sat -- 10:30 PM CST     Moonrise
Sat -- 11:05 PM CST     -0.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Matamoros, Tamaulipas, Mexico does not exist in database. Press Edit above and select a valid nearby location.

Matamoros, Tamaulipas, Mexico, Tide feet
12
am
-0.4
1
am
-0.2
2
am
0.1
3
am
0.4
4
am
0.7
5
am
1
6
am
1.2
7
am
1.3
8
am
1.4
9
am
1.4
10
am
1.3
11
am
1.3
12
pm
1.3
1
pm
1.2
2
pm
1.1
3
pm
1.1
4
pm
0.9
5
pm
0.7
6
pm
0.5
7
pm
0.2
8
pm
-0
9
pm
-0.3
10
pm
-0.4
11
pm
-0.5

Area Discussion for Brownsville, TX
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NOTE: mouseover dotted underlined text for definition
FXUS64 KBRO 141820 AFDBRO

Area Forecast Discussion National Weather Service Brownsville TX 120 PM CDT Sat Jun 14 2025

New SHORT TERM, LONG TERM, AVIATION, MARINE


SHORT TERM
(Tonight through Sunday night)
Issued at 119 PM CDT Sat Jun 14 2025

Overall benign weather conditions are expected for the remainder of this weekend. Continued southeasterly flow, plentiful daytime heating, and weak surface convergence in the absence of deeper atmospheric forcing will lead to isolated showers this afternoon into overnight tonight. Aside from a slight uptick in streamer and garden variety showers across the coastal areas on Sunday, hi-res guidance suggests that most of Sunday should also stay dry with the best chances for more organized convection and thunderstorms to our north. That being said, cannot completely rule out a stray thunderstorm that develops over the inland area or an outflow driven convective activity, as we saw on Thursday evening. However, this remains an unlikely scenario (less than 20 percent chance) given that a 590+ Dm ridge begins to build in from the west.

Otherwise, hot and humid conditions continue with maximum heat index values of 103-109. Overnight low temperatures will only drop into the upper 70s and low 80s with dew points in the low to mid 70s.

LONG TERM
(Monday through next Saturday)
Issued at 119 PM CDT Sat Jun 14 2025

After a relatively benign start to the new work week, the weather pattern gets increasingly unsettled towards mid week as mid to long range guidance shows a plume of tropical moisture advecting northwards into the Gulf of America from the Carribean. As typical with longer range guidance, the average model error beyond three days or 72 hours is over 150 miles. NAEFS situational awareness ensemble guidance indicates that the PWATs and Integrated Water Vapor Transport (IVT) increase to 2-3 standard deviations above normal for the latter half of the week. Unsurprisingly, CPC 6-10 day precipitation outlook shows a 70-80 percent confidence in above normal precipitation. To be clear, the NHC is not expecting tropical cyclone activity anywhere in the Atlantic basin, including the Gulf of America, in the next 7 days. What this means is that Deep South Texas and the Rio Grande Valley (RGV) could see increasing chances (50 to 60 percent) of moderate to locally heavy rainfall by the latter half of next week. With increasing rain chances and cloud cover, heat risk concerns are also expected to decrease. In fact, the CPC 6-10 day temperature outlook is suggesting near to even slightly below normal temperatures (33-40 percent confidence) for our region. For reference, normal highs for mid June in Deep South Texas and the RGV are in the mid to upper 90s, except upper 80s to near 90 for SPI.

AVIATION
(18Z TAFS)
Issued at 119 PM CDT Sat Jun 14 2025

Generally favorable flying conditions with good visibilities are expected for the TAF period. Southeast to south-southeast winds with gusts over 20 kt at times during the late morning to early afternoon hours are expected, diminishing to below 10 kt during the overnight hours. Between 06-12z, there is highest confidence (60-70 percent)
of MVFR ceilings with a low chance of brief IFR ceilings (10-20 percent) for KMFE; medium confidence (40-50 percent) of MVFR ceilings at KBRO and low-medium confidence (20-30 percent) of MVFR ceilings at KHRL.

MARINE
Issued at 119 PM CDT Sat Jun 14 2025

Generally favorable marine conditions are expected this weekend through early next week with light to moderate southeasterly winds and low to moderate seas. Mainly dry and seasonably warm conditions are expected over the weekend except for isolated showers (less than 10 percent coverage) over the Gulf waters. Weather pattern becomes increasingly unsettled as we head into middle of next week, with 10- 30 percent chance for showers and thunderstorms Monday into Tuesday, increasing to 30-50 percent for Wednesday into Friday. As the surface pressure gradient tightens mid to late next week, Small Craft Exercise Caution and Small Craft Advisory conditions could potentially be reached.

PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 81 94 80 93 / 30 30 30 40 HARLINGEN 79 96 77 95 / 10 30 20 30 MCALLEN 81 100 80 99 / 10 20 10 30 RIO GRANDE CITY 79 98 78 97 / 10 10 10 10 SOUTH PADRE ISLAND 82 88 81 88 / 20 30 30 40 BAYVIEW/PORT ISABEL 80 93 79 92 / 20 30 30 40

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


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi51 minESE 13G18 87°F 85°F29.94
BZST2 3 mi51 minESE 9.9G11 83°F 79°F29.90
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi51 minESE 11G13 84°F 79°F29.92
RLIT2 14 mi51 minSE 16G19 87°F 91°F29.93
PMNT2 36 mi51 min 87°F 90°F29.93


Wind History for Port Isabel, TX
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KPIL PORT ISABELCAMERON COUNTY,TX 10 sm52 minESE 1710 smClear88°F79°F75%29.95
KBRO BROWNSVILLE/SOUTH PADRE ISLAND INTL,TX 15 sm52 minSSE 1510 smA Few Clouds93°F73°F53%29.93

Weather Map
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GEOS Local Image of gulf of mexico  
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Brownsville, TX,





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