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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Overnight
Low: 80 °F
S 16kt
2-3ft
Tuesday
High: 83 °F
S 17kt
2ft
Tuesday Night
Low: 80 °F
SSW 14kt
2-3ft
Wednesday
High: 87 °F
S 14kt
2ft
Wednesday Night
Low: 85 °F
S 19kt
3-4ft
Thursday
High: 88 °F
SSE 20kt
3ft
Thursday Night
Low: 86 °F
SSE 22kt
4-5ft
Juneteenth
High: 87 °F
SE 18kt
2-3ft
Friday Night
Low: 84 °F
SE 16kt
2-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:21 am CDT Jun 16, 2026
Forecast Valid: 12am CDT Jun 16, 2026-6pm CDT Jun 22, 2026

View Nearby Observations

Detailed Forecast

Overnight

S wind 13 to 16 kt. Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Some of the storms could produce heavy rainfall. Seas 2 to 3 ft.

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 2 to 3 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 3 to 4 ft.

Thursday

SSE wind around 20 kt. Sunny. Seas around 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 14 to 16 kt. Mostly cloudy. Seas 2 to 4 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.