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Brownsville, TX Local Forecast Office

5NM NW Port Isabel TX

Marine Point Forecast

[NOTICE]

Overnight
Low: 81 °F
SE 8kt
< 1ft
Monday
High: 84 °F
E 12kt
< 1ft
Monday Night
Low: 81 °F
E 11kt
< 1ft
Tuesday
High: 84 °F
⇑E 12kt
< 1ft
Tuesday Night
Low: 80 °F
E 11kt⇓
< 1ft
Wednesday
High: 83 °F
⇑E 13kt
< 1ft
Wednesday Night
Low: 80 °F
ESE 13kt
< 1ft
Thursday
High: 84 °F
⇑E 14kt
< 1ft
Thursday Night
Low: 81 °F
E 12kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:30 am CDT Jun 1, 2026
Forecast Valid: 12am CDT Jun 1, 2026-6pm CDT Jun 7, 2026

View Nearby Observations

Detailed Forecast

Overnight

SE wind 6 to 8 kt. Partly cloudy. Seas 1 ft or less.

Monday

SSE wind 5 to 12 kt becoming E in the morning. Mostly sunny. Seas 1 ft or less.

Monday Night

E wind 5 to 11 kt becoming SSE after midnight. Partly cloudy. Seas 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming E 7 to 12 kt in the morning. A slight chance of showers and thunderstorms between noon and 2pm. Seas 1 ft or less.

Tuesday Night

E wind 6 to 11 kt becoming variable and less than 5 kt after midnight. A slight chance of showers and thunderstorms after 1am. Seas 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming E 8 to 13 kt in the morning. A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 4pm, then a slight chance of showers after 4pm. Seas 1 ft or less.

Wednesday Night

ESE wind 5 to 13 kt. Partly cloudy. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming E 9 to 14 kt in the morning. A slight chance of showers and thunderstorms after 1pm. Seas 1 ft or less.

Thursday Night

E wind 8 to 12 kt becoming SSE after midnight. A slight chance of showers after 1am. 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.