For More Weather Information:

Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]
    • Today

      Today:SE wind around 19 kt. A slight chance of showers before 10am.   Seas around 3 ft.

      High: 84 °F

      SE 19kt
      3ft

    • Tonight

      Tonight:SE wind 15 to 20 kt. A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 4am.   Seas 3 to 4 ft.

      Low: 81 °F

      SE 20kt
      3-4ft

    • Tuesday

      Tuesday:SE wind 14 to 16 kt. A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm.   Seas 2 to 3 ft.

      High: 83 °F

      SE 16kt
      2-3ft

    • Tuesday Night

      Tuesday Night:SE wind 13 to 17 kt. A slight chance of showers after 1am.   Seas 2 to 4 ft.

      Low: 81 °F

      SE 17kt
      2-4ft

    • Wednesday

      Wednesday:SE wind around 15 kt. Partly sunny. Seas around 2 ft.

      High: 83 °F

      SE 15kt
      2ft

    • Wednesday Night

      Wednesday Night:ESE wind around 12 kt. Mostly cloudy. Seas 2 to 3 ft.

      Low: 80 °F

      ESE 12kt
      2-3ft

    • Thursday

      Thursday:SE wind 11 to 16 kt. A slight chance of showers.   Seas around 2 ft.

      High: 82 °F

      SE 16kt
      2ft

    • Thursday Night

      Thursday Night:SE wind 10 to 15 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1am.   Seas 2 to 3 ft.

      Low: 80 °F

      SE 15kt
      2-3ft

    • Friday

      Friday:SSE wind 9 to 16 kt. A chance of showers and thunderstorms.   Seas around 2 ft.

      High: 82 °F

      SSE 16kt
      2ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 9:46 am CDT May 18, 2026
Forecast Valid: 9am CDT May 18, 2026-6pm CDT May 24, 2026

View Nearby Observations

Detailed Forecast


Today
SE wind around 19 kt. A slight chance of showers before 10am. Seas around 3 ft.
Tonight
SE wind 15 to 20 kt. A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 4am. Seas 3 to 4 ft.
Tuesday
SE wind 14 to 16 kt. A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm, then a slight chance of showers after 4pm. Seas 2 to 3 ft.
Tuesday Night
SE wind 13 to 17 kt. A slight chance of showers after 1am. Seas 2 to 4 ft.
Wednesday
SE wind around 15 kt. Partly sunny. Seas around 2 ft.
Wednesday Night
ESE wind around 12 kt. Mostly cloudy. Seas 2 to 3 ft.
Thursday
SE wind 11 to 16 kt. A slight chance of showers. Seas around 2 ft.
Thursday Night
SE wind 10 to 15 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1am. Seas 2 to 3 ft.
Friday
SSE wind 9 to 16 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Winds and seas 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.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

Point Forecast: 26.11°N 97.16°W
Last Update: 9:46 am CDT May 18, 2026
Forecast Valid: 9am CDT May 18, 2026-6pm CDT May 24, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data