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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Tuesday
High: 83 °F
S 17kt
2ft
Tuesday Night
Low: 80 °F
SSW 14kt
2ft
Wednesday
High: 87 °F
S 14kt
2ft
Wednesday Night
Low: 85 °F
S 19kt
3ft
Thursday
High: 88 °F
SSE 20kt
2-3ft
Thursday Night
Low: 86 °F
SSE 22kt
4-5ft
Juneteenth
High: 87 °F
SE 18kt
2-3ft
Friday Night
Low: 84 °F
SE 15kt
2-4ft
Saturday
High: 86 °F
SE 14kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:18 am CDT Jun 16, 2026
Forecast Valid: 4am CDT Jun 16, 2026-6pm CDT Jun 22, 2026

View Nearby Observations

Detailed Forecast

Tuesday

S wind 10 to 17 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas around 2 ft.

Tuesday Night

SSW wind 9 to 14 kt. Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Seas around 2 ft.

Wednesday

SW wind 11 to 14 kt becoming S in the afternoon. A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 3pm. Seas around 2 ft.

Wednesday Night

S wind 15 to 19 kt. Mostly clear. Seas around 3 ft.

Thursday

SSE wind around 20 kt. Sunny. Seas 2 to 3 ft.

Thursday Night

SSE wind 19 to 22 kt. Mostly clear. Seas 4 to 5 ft.

Juneteenth

SE wind 16 to 18 kt. Sunny. Seas 2 to 3 ft.

Friday Night

SE wind around 15 kt. A slight chance of showers and thunderstorms after 1am. Seas 2 to 4 ft.

Saturday

SE wind around 14 kt. Partly sunny. Seas 2 to 3 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.