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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 69 °F
NNE 16kt
< 1ft

Small Craft Advisory
Sunday
High: 72 °F
NE 20kt
< 1ft

Small Craft Advisory
Sunday Night
Low: 68 °F
NE 16kt
< 1ft

Small Craft Advisory
Monday
High: 74 °F
E 15kt
< 1ft
Monday Night
Low: 72 °F
E 14kt
< 1ft
Tuesday
High: 78 °F
SE 14kt
< 1ft
Tuesday Night
Low: 72 °F
SE 13kt
< 1ft
Wednesday
High: 80 °F
SE 14kt
< 1ft
Wednesday Night
Low: 73 °F
ESE 12kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:45 pm CDT Apr 18, 2026
Forecast Valid: 10pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 9 to 16 kt becoming NNE after midnight. A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Seas 1 ft or less.

Sunday

NE wind 18 to 20 kt. Showers and thunderstorms likely before noon, then a chance of showers between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. Seas 1 ft or less.

Sunday Night

NE wind 10 to 16 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Monday

E wind 9 to 15 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Monday Night

E wind 9 to 14 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday

SE wind 9 to 14 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Tuesday Night

SE wind 8 to 13 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

SE wind 7 to 14 kt. Mostly sunny. Seas 1 ft or less.

Wednesday Night

ESE wind 10 to 12 kt. Mostly clear. Seas 1 ft or less.

*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.