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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Tonight
Low: 77 °F
SE 9kt
< 1ft
Saturday
High: 82 °F
⇑E 10kt
< 1ft
Saturday Night
Low: 77 °F
E 8kt⇓
< 1ft
Sunday
High: 83 °F
⇑ESE 11kt
< 1ft
Sunday Night
Low: 78 °F
ESE 9kt
< 1ft
Monday
High: 81 °F
⇑NNE 16kt
< 1ft
Monday Night
Low: 76 °F
NE 13kt
< 1ft
Tuesday
High: 81 °F
ENE 11kt
< 1ft
Tuesday Night
Low: 74 °F
ENE 10kt⇓
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:18 pm CDT May 8, 2026
Forecast Valid: 10pm CDT May 8, 2026-6pm CDT May 15, 2026

View Nearby Observations

Detailed Forecast

Tonight

SE wind 5 to 9 kt. Mostly cloudy. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming E 5 to 10 kt in the morning. A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Saturday Night

E wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas 1 ft or less.

Sunday

Variable winds less than 5 kt becoming ESE 6 to 11 kt in the morning. Partly sunny. Seas 1 ft or less.

Sunday Night

ESE wind 5 to 9 kt becoming ENE after midnight. Mostly cloudy. Seas 1 ft or less.

Monday

NNE wind 5 to 10 kt increasing to 11 to 16 kt in the afternoon. Mostly cloudy. Seas 1 ft or less.

Monday Night

NE wind 6 to 13 kt. Mostly cloudy. Seas 1 ft or less.

Tuesday

ENE wind 6 to 11 kt. Partly sunny. Seas 1 ft or less.

Tuesday Night

ENE wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. 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.