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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 86 °F
SE 13kt
2ft
Tonight
Low: 80 °F
S 13kt
1-2ft
Thursday
High: 85 °F
SE 13kt
1-2ft
Thursday Night
Low: 81 °F
SSE 14kt
2ft
Friday
High: 85 °F
SE 14kt
2ft
Friday Night
Low: 82 °F
SE 13kt
2ft
Saturday
High: 86 °F
SE 15kt
2-3ft
Saturday Night
Low: 82 °F
SSE 13kt
2-3ft
Sunday
High: 86 °F
SE 13kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:45 pm CDT Jul 8, 2026
Forecast Valid: 5pm CDT Jul 8, 2026-6pm CDT Jul 15, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 13 kt. Mostly sunny. Seas around 2 ft.

Tonight

S wind 9 to 13 kt. Partly cloudy. Seas 1 to 2 ft.

Thursday

SE wind 8 to 13 kt. A 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 1 to 2 ft.

Thursday Night

SSE wind 12 to 14 kt. A chance of showers and thunderstorms, mainly after 2am. Seas around 2 ft.

Friday

SE wind 12 to 14 kt. A chance of showers and thunderstorms before 1pm. Seas around 2 ft.

Friday Night

SE wind around 13 kt. A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Seas around 2 ft.

Saturday

SE wind 13 to 15 kt. A chance of showers and thunderstorms, mainly before 1pm. Seas 2 to 3 ft.

Saturday Night

SSE wind 11 to 13 kt. Mostly clear. Seas 2 to 3 ft.

Sunday

SE wind 11 to 13 kt. Mostly sunny. Seas around 2 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.