For More Weather Information:

Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 85 °F
SE 13kt
1ft
Tonight
Low: 82 °F
SSE 13kt
2ft
Independence Day
High: 85 °F
SE 14kt
1ft
Saturday Night
Low: 82 °F
SSE 14kt
2ft
Sunday
High: 85 °F
SSE 14kt
1ft
Sunday Night
Low: 82 °F
SE 13kt
1-2ft
Monday
High: 85 °F
SE 13kt
1-2ft
Monday Night
Low: 82 °F
SSE 12kt
2ft
Tuesday
High: 86 °F
SE 13kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:18 pm CDT Jul 3, 2026
Forecast Valid: 5pm CDT Jul 3, 2026-6pm CDT Jul 10, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 13 kt. Mostly sunny. Seas around 1 ft.

Tonight

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

Independence Day

SE wind 10 to 14 kt. A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Seas around 1 ft.

Saturday Night

SSE wind 11 to 14 kt. A slight chance of showers and thunderstorms before 7pm. Seas around 2 ft.

Sunday

SSE wind 11 to 14 kt. Sunny. Seas around 1 ft.

Sunday Night

SE wind 11 to 13 kt. Partly cloudy. Seas 1 to 2 ft.

Monday

SE wind 10 to 13 kt. Mostly sunny. Seas 1 to 2 ft.

Monday Night

SSE wind 10 to 12 kt. Partly cloudy. Seas around 2 ft.

Tuesday

SE wind 10 to 13 kt. Mostly sunny. Seas 1 to 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.