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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 83 °F
SE 13kt
5ft
Tonight
Low: 79 °F
SE 12kt
4ft
Tuesday
High: 83 °F
SE 13kt
4ft
Tuesday Night
Low: 80 °F
SE 10kt
3-4ft
Wednesday
High: 85 °F
SE 12kt
3ft
Wednesday Night
Low: 81 °F
SE 12kt
3ft
Thursday
High: 84 °F
SE 15kt
2-3ft
Thursday Night
Low: 81 °F
SE 13kt
3ft
Independence Day
High: 85 °F
SSE 14kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:00 pm CDT Jun 30, 2025
Forecast Valid: 3pm CDT Jun 30, 2025-6pm CDT Jul 6, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 13 kt. A chance of showers and thunderstorms, mainly before 4pm. Seas around 5 ft.

Tonight

SE wind around 12 kt. A chance of showers and thunderstorms, mainly after 9pm. Seas around 4 ft.

Tuesday

SE wind 11 to 13 kt. A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 3pm, then a chance of showers and thunderstorms after 3pm. Seas around 4 ft.

Tuesday Night

SE wind around 10 kt. A slight chance of showers and thunderstorms before 7pm, then a chance of showers between 7pm and 4am, then a chance of showers and thunderstorms after 4am. Seas 3 to 4 ft.

Wednesday

SE wind 10 to 12 kt. A slight chance of showers and thunderstorms. Seas around 3 ft.

Wednesday Night

SE wind around 12 kt. Mostly cloudy. Seas around 3 ft.

Thursday

SE wind 10 to 15 kt. Partly sunny. Seas 2 to 3 ft.

Thursday Night

SE wind around 13 kt. Mostly cloudy. Seas around 3 ft.

Independence Day

SSE wind 12 to 14 kt. Mostly sunny. Seas around 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.