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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 83 °F
SE 13kt
5ft
Tonight
Low: 78 °F
ESE 10kt
4-5ft
Tuesday
High: 83 °F
ESE 12kt
4ft
Tuesday Night
Low: 78 °F
SE 10kt
4ft
Wednesday
High: 85 °F
SE 13kt
3ft
Wednesday Night
Low: 80 °F
SE 12kt
3ft
Thursday
High: 86 °F
SE 15kt
3ft
Thursday Night
Low: 80 °F
SSE 13kt
3ft
Independence Day
High: 86 °F
SSE 15kt
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 slight chance of showers and thunderstorms. Seas around 5 ft.

Tonight

ESE wind around 10 kt. A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 9pm. Seas 4 to 5 ft.

Tuesday

ESE wind 9 to 12 kt. A chance of showers and thunderstorms before 9am, then showers likely and possibly a thunderstorm between 9am and 3pm, then a chance of showers and thunderstorms after 3pm. Seas around 4 ft.

Tuesday Night

SE wind 8 to 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 around 4 ft.

Wednesday

SE wind 8 to 13 kt. A slight chance of showers and thunderstorms. Seas around 3 ft.

Wednesday Night

SE wind 9 to 12 kt. Mostly cloudy. Seas around 3 ft.

Thursday

SE wind 9 to 15 kt. Partly sunny. Seas around 3 ft.

Thursday Night

SSE wind 10 to 13 kt. Mostly cloudy. Seas around 3 ft.

Independence Day

SSE wind 9 to 15 kt. Mostly sunny. Seas around 3 ft.

Winds and waves 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.