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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]
    • Today

      Today:SE wind 16 to 20 kt. Mostly sunny. Seas 1 ft or less.

      High: 81 °F

      SE 20kt
      < 1ft

    • Tonight

      Tonight:SSE wind 15 to 17 kt. Mostly cloudy. Seas 1 ft or less.

      Low: 74 °F

      SSE 17kt
      < 1ft

    • Saturday

      Saturday:SSE wind 14 to 17 kt. Mostly cloudy. Seas 1 ft or less.

      High: 81 °F

      SSE 17kt
      < 1ft

    • Saturday Night

      Saturday Night:E wind 8 to 12 kt becoming NNE after midnight. A slight chance of showers, then showers likely and possibly a thunderstorm after 1am.   Seas 1 ft or less.

      Low: 69 °F

      NNE 12kt
      < 1ft

    • Sunday

      Sunday:NE wind around 19 kt. Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm.   Seas 1 ft or less.

      High: 73 °F

      NE 19kt
      < 1ft

    • Sunday Night

      Sunday Night:ENE wind 11 to 16 kt. Showers likely and possibly a thunderstorm.   Seas 1 ft or less.

      Low: 70 °F

      ENE 16kt
      < 1ft

    • Monday

      Monday:E wind 11 to 15 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall.   Seas 1 ft or less.

      High: 76 °F

      E 15kt
      < 1ft

    • Monday Night

      Monday Night:E wind 9 to 14 kt. A chance of showers and thunderstorms, mainly before 1am.   Seas 1 ft or less.

      Low: 71 °F

      E 14kt
      < 1ft

    • Tuesday

      Tuesday:SE wind 8 to 15 kt. A slight chance of showers and thunderstorms.   Seas 1 ft or less.

      High: 78 °F

      SE 15kt
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:00 am CDT Apr 17, 2026
Forecast Valid: 10am CDT Apr 17, 2026-6pm CDT Apr 23, 2026

View Nearby Observations

Detailed Forecast


Today
SE wind 16 to 20 kt. Mostly sunny. Seas 1 ft or less.
Tonight
SSE wind 15 to 17 kt. Mostly cloudy. Seas 1 ft or less.
Saturday
SSE wind 14 to 17 kt. Mostly cloudy. Seas 1 ft or less.
Saturday Night
E wind 8 to 12 kt becoming NNE after midnight. A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Seas 1 ft or less.
Sunday
NE wind around 19 kt. Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. Seas 1 ft or less.
Sunday Night
ENE wind 11 to 16 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.
Monday
E wind 11 to 15 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Monday Night
E wind 9 to 14 kt. A chance of showers and thunderstorms, mainly before 1am. Seas 1 ft or less.
Tuesday
SE wind 8 to 15 kt. A slight chance of showers and thunderstorms. 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: 10:00 am CDT Apr 17, 2026
Forecast Valid: 10am CDT Apr 17, 2026-6pm CDT Apr 23, 2026
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