For More Weather Information:

Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 81 °F
SE 15kt
2ft
Tonight
Low: 77 °F
ESE 12kt
2ft
Friday
High: 81 °F
SE 16kt
2ft
Friday Night
Low: 67 °F
⇑N 23kt
2-3ft
Saturday
High: 72 °F
N 26kt
4-5ft
Saturday Night
Low: 70 °F
NNE 19kt
5ft
Sunday
High: 75 °F
ENE 11kt
2ft
Sunday Night
Low: 72 °F
E 11kt
2-3ft
Monday
High: 77 °F
SE 13kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:30 pm CDT Apr 30, 2026
Forecast Valid: 12pm CDT Apr 30, 2026-6pm CDT May 6, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

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

Tonight

ESE wind around 12 kt. Mostly cloudy. Seas around 2 ft.

Friday

SE wind 12 to 16 kt. Mostly sunny. Seas around 2 ft.

Friday Night

SE wind 11 to 16 kt becoming N 18 to 23 kt after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Saturday

N wind 22 to 26 kt. A chance of showers and thunderstorms. Seas 4 to 5 ft.

Saturday Night

NNE wind 10 to 19 kt. Mostly cloudy. Seas 5 ft subsiding to 2 ft.

Sunday

ENE wind around 11 kt. Partly sunny. Seas around 2 ft.

Sunday Night

E wind 9 to 11 kt becoming SE after midnight. Partly cloudy. Seas 2 to 3 ft.

Monday

SE wind 8 to 13 kt. Partly 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.