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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 85 °F
SSE 15kt
2ft
Tonight
Low: 80 °F
SE 19kt
2-3ft
Tuesday
High: 84 °F
S 21kt
2ft
Tuesday Night
Low: 80 °F
S 16kt
2-3ft
Wednesday
High: 87 °F
SSW 17kt
2ft
Wednesday Night
Low: 84 °F
S 19kt
3-4ft
Thursday
High: 88 °F
S 22kt
3ft
Thursday Night
Low: 85 °F
SSE 22kt
4-5ft
Juneteenth
High: 87 °F
SE 17kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:18 pm CDT Jun 15, 2026
Forecast Valid: 3pm CDT Jun 15, 2026-6pm CDT Jun 21, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SSE wind around 15 kt. Partly sunny. Seas around 2 ft.

Tonight

SE wind 13 to 19 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Seas 2 to 3 ft.

Tuesday

S wind 14 to 21 kt. Showers and thunderstorms before noon, then showers and possibly a thunderstorm, mainly after noon. Seas around 2 ft.

Tuesday Night

S wind 11 to 16 kt. Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 10pm, then showers likely and possibly a thunderstorm after 10pm. Some of the storms could produce heavy rainfall. Seas 2 to 3 ft.

Wednesday

SSW wind 13 to 17 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Wednesday Night

S wind 16 to 19 kt. A slight chance of showers and thunderstorms. Seas 3 to 4 ft.

Thursday

S wind 20 to 22 kt. Sunny. Seas around 3 ft.

Thursday Night

SSE wind 19 to 22 kt. Mostly clear. Seas 4 to 5 ft.

Juneteenth

SE wind 15 to 17 kt. Sunny. Seas 2 to 3 ft.

Winds and seas higher in and near thunderstorms.

*Notices:

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.
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.