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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

This Afternoon
High: 82 °F
SE 10kt
< 1ft
Tonight
Low: 78 °F
SSE 10kt
< 1ft
Friday
High: 84 °F
SE 14kt
< 1ft
Friday Night
Low: 80 °F
SE 12kt
< 1ft
Saturday
High: 84 °F
SE 13kt
< 1ft
Saturday Night
Low: 78 °F
E 11kt
< 1ft
Sunday
High: 83 °F
SE 10kt
< 1ft
Sunday Night
Low: 77 °F
E 8kt⇓
< 1ft
Memorial Day
High: 84 °F
⇑E 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:18 pm CDT May 21, 2026
Forecast Valid: 3pm CDT May 21, 2026-6pm CDT May 27, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 10 kt. A chance of showers and thunderstorms, mainly after 4pm. Seas 1 ft or less.

Tonight

SSE wind 6 to 10 kt. A chance of showers and thunderstorms, mainly before 1am. Seas 1 ft or less.

Friday

SE wind 7 to 14 kt. A slight chance of showers and thunderstorms between 3pm and 4pm. Seas 1 ft or less.

Friday Night

SE wind 9 to 12 kt. A slight chance of showers and thunderstorms between 11pm and 1am, then a slight chance of showers after 1am. Seas 1 ft or less.

Saturday

SE wind 8 to 13 kt. A slight chance of showers, then a chance of showers and thunderstorms after 10am. Seas 1 ft or less.

Saturday Night

E wind 8 to 11 kt becoming S after midnight. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Sunday

SE wind 5 to 10 kt. Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Seas 1 ft or less.

Sunday Night

E wind 5 to 8 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms, mainly after 1am. Seas 1 ft or less.

Memorial Day

Variable winds less than 5 kt becoming E 5 to 10 kt in the morning. A slight chance of showers and thunderstorms. 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.