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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 80 °F
SSE 16kt
3ft
Tonight
Low: 77 °F
SE 12kt
2-3ft
Thursday
High: 80 °F
SE 15kt
2ft
Thursday Night
Low: 77 °F
ESE 13kt
2-3ft
Friday
High: 82 °F
SSE 16kt
2ft
Friday Night
Low: 66 °F
⇑N 23kt
2-3ft
Saturday
High: 71 °F
N 26kt
3-4ft
Saturday Night
Low: 68 °F
NNE 22kt⇓
6ft
Sunday
High: 74 °F
NNE 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:30 pm CDT Apr 29, 2026
Forecast Valid: 5pm CDT Apr 29, 2026-6pm CDT May 6, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SSE wind around 16 kt. Mostly sunny. Seas around 3 ft.

Tonight

SE wind around 12 kt. Mostly cloudy. Seas 2 to 3 ft.

Thursday

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

Thursday Night

ESE wind around 13 kt. Mostly cloudy. Seas 2 to 3 ft.

Friday

SSE wind 10 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 23 to 26 kt. A chance of showers and thunderstorms. Seas 3 to 4 ft.

Saturday Night

NNE wind 17 to 22 kt decreasing to 10 to 15 kt after midnight. Mostly cloudy. Seas 6 ft subsiding to 2 ft.

Sunday

NNE wind around 10 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.