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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]
    • Today

      Today:Variable winds less than 5 kt becoming N 10 to 15 kt in the morning. Widespread haze before 10am, then Widespread haze between 2pm and 4pm. Patchy fog between 2pm and 4pm.  Seas around 2 ft.

      High: 74 °F

      ⇑N 15kt
      2ft

    • Tonight

      Tonight:N wind 16 to 21 kt increasing to 22 to 27 kt after midnight. Partly cloudy. Seas 2 ft building to 5 ft.

      Low: 60 °F

      ⇑N 27kt
      Waves Building5ft

    • Sunday

      Sunday:N wind 19 to 26 kt. Mostly sunny. Seas 4 to 5 ft.

      High: 64 °F

      N 26kt
      4-5ft

    • Sunday Night

      Sunday Night:NNE wind 12 to 18 kt. Mostly clear. Seas 3 to 5 ft.

      Low: 59 °F

      NNE 18kt
      3-5ft

    • Monday

      Monday:NE wind 12 to 14 kt. Mostly sunny. Seas 3 to 4 ft.

      High: 64 °F

      NE 14kt
      3-4ft

    • Monday Night

      Monday Night:ENE wind 9 to 11 kt becoming SE after midnight. Mostly clear. Seas 2 to 4 ft.

      Low: 60 °F

      ENE 11kt
      2-4ft

    • Tuesday

      Tuesday:SSE wind 9 to 17 kt. Mostly sunny. Seas 2 to 3 ft.

      High: 69 °F

      SSE 17kt
      2-3ft

    • Tuesday Night

      Tuesday Night:S wind 17 to 19 kt. Mostly clear. Seas 2 to 3 ft.

      Low: 66 °F

      S 19kt
      2-3ft

    • Wednesday

      Wednesday:S wind 19 to 23 kt. Sunny. Seas 2 to 3 ft.

      High: 73 °F

      S 23kt
      2-3ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:00 am CST Feb 21, 2026
Forecast Valid: 8am CST Feb 21, 2026-6pm CST Feb 27, 2026

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Detailed Forecast


Today
Variable winds less than 5 kt becoming N 10 to 15 kt in the morning. Widespread haze before 10am, then Widespread haze between 2pm and 4pm. Patchy fog between 2pm and 4pm. Seas around 2 ft.
Tonight
N wind 16 to 21 kt increasing to 22 to 27 kt after midnight. Partly cloudy. Seas 2 ft building to 5 ft.
Sunday
N wind 19 to 26 kt. Mostly sunny. Seas 4 to 5 ft.
Sunday Night
NNE wind 12 to 18 kt. Mostly clear. Seas 3 to 5 ft.
Monday
NE wind 12 to 14 kt. Mostly sunny. Seas 3 to 4 ft.
Monday Night
ENE wind 9 to 11 kt becoming SE after midnight. Mostly clear. Seas 2 to 4 ft.
Tuesday
SSE wind 9 to 17 kt. Mostly sunny. Seas 2 to 3 ft.
Tuesday Night
S wind 17 to 19 kt. Mostly clear. Seas 2 to 3 ft.
Wednesday
S wind 19 to 23 kt. Sunny. Seas 2 to 3 ft.

*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: 26.11°N 97.16°W
Last Update: 8:00 am CST Feb 21, 2026
Forecast Valid: 8am CST Feb 21, 2026-6pm CST Feb 27, 2026
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