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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:N wind around 21 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall.   Seas 1 ft or less.

      High: 64 °F

      N 21kt
      < 1ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:N wind 17 to 20 kt. Showers and possibly a thunderstorm before 4am, then showers likely.   Seas 1 ft or less.

      Low: 62 °F

      N 20kt
      < 1ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday

      Monday:N wind around 19 kt. Showers likely, mainly before 10am.   Seas 1 ft or less.

      High: 68 °F

      N 19kt
      < 1ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday Night

      Monday Night:N wind 5 to 14 kt. Mostly cloudy. Seas 1 ft or less.

      Low: 63 °F

      N 14kt
      < 1ft

    • Tuesday

      Tuesday:NNE wind 5 to 11 kt becoming ENE in the afternoon. A slight chance of showers after 1pm.   Seas 1 ft or less.

      High: 73 °F

      ENE 11kt
      < 1ft

    • Tuesday Night

      Tuesday Night:E wind 5 to 10 kt becoming SE after midnight. A slight chance of showers.   Seas 1 ft or less.

      Low: 67 °F

      E 10kt
      < 1ft

    • Wednesday

      Wednesday:E wind 5 to 11 kt. A slight chance of showers.   Seas 1 ft or less.

      High: 75 °F

      E 11kt
      < 1ft

    • Wednesday Night

      Wednesday Night:E wind 5 to 10 kt. A slight chance of showers.   Seas 1 ft or less.

      Low: 70 °F

      E 10kt
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming ESE 8 to 13 kt in the morning. A chance of showers and thunderstorms, mainly after 1pm.   Seas 1 ft or less.

      High: 77 °F

      ⇑ESE 13kt
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:45 pm CDT Apr 5, 2026
Forecast Valid: 5pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026

View Nearby Observations

Detailed Forecast


This Afternoon
N wind around 21 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Tonight
N wind 17 to 20 kt. Showers and possibly a thunderstorm before 4am, then showers likely. Seas 1 ft or less.
Monday
N wind around 19 kt. Showers likely, mainly before 10am. Seas 1 ft or less.
Monday Night
N wind 5 to 14 kt. Mostly cloudy. Seas 1 ft or less.
Tuesday
NNE wind 5 to 11 kt becoming ENE in the afternoon. A slight chance of showers after 1pm. Seas 1 ft or less.
Tuesday Night
E wind 5 to 10 kt becoming SE after midnight. A slight chance of showers. Seas 1 ft or less.
Wednesday
E wind 5 to 11 kt. A slight chance of showers. Seas 1 ft or less.
Wednesday Night
E wind 5 to 10 kt. A slight chance of showers. Seas 1 ft or less.
Thursday
Variable winds less than 5 kt becoming ESE 8 to 13 kt in the morning. A chance of showers and thunderstorms, mainly after 1pm. Seas 1 ft or less.

Winds and waves higher in and near thunderstorms.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 26.15°N 97.29°W
Last Update: 5:45 pm CDT Apr 5, 2026
Forecast Valid: 5pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
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