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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 76 °F
E 12kt
< 1ft
Tonight
Low: 71 °F
E 11kt
< 1ft
Thursday
High: 77 °F
E 12kt
< 1ft
Thursday Night
Low: 71 °F
ESE 12kt
< 1ft
Friday
High: 76 °F
ESE 13kt
< 1ft
Friday Night
Low: 72 °F
ESE 12kt
< 1ft
Saturday
High: 78 °F
ESE 17kt
< 1ft
Saturday Night
Low: 73 °F
SE 16kt
< 1ft
Sunday
High: 80 °F
SSE 20kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:21 pm CDT Apr 8, 2026
Forecast Valid: 12pm CDT Apr 8, 2026-6pm CDT Apr 14, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

E wind 9 to 12 kt. A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Seas 1 ft or less.

Tonight

E wind 5 to 11 kt. Mostly cloudy. Seas 1 ft or less.

Thursday

E wind 5 to 12 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Seas 1 ft or less.

Thursday Night

ESE wind 6 to 12 kt. A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Friday

ESE wind 5 to 13 kt. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Seas 1 ft or less.

Friday Night

ESE wind 8 to 12 kt. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Seas 1 ft or less.

Saturday

ESE wind 8 to 17 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday Night

SE wind 14 to 16 kt. Partly cloudy. Seas 1 ft or less.

Sunday

SSE wind 13 to 20 kt. Partly sunny. Seas 1 ft or less.

Winds and waves 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.