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Brownsville, TX Local Forecast Office

4NM ENE Port Isabel TX

Marine Point Forecast

[NOTICE]

Saturday
High: 79 °F
S 16kt
2ft
Saturday Night
Low: 72 °F
NNE 15kt
2-3ft
Sunday
High: 72 °F
NE 22kt
2-3ft
Sunday Night
Low: 71 °F
ENE 18kt
5ft
Monday
High: 75 °F
E 16kt
2ft
Monday Night
Low: 73 °F
E 15kt
2-4ft
Tuesday
High: 77 °F
SE 14kt
2ft
Tuesday Night
Low: 74 °F
SE 13kt
2-3ft
Wednesday
High: 78 °F
SSE 14kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:30 am CDT Apr 18, 2026
Forecast Valid: 3am CDT Apr 18, 2026-6pm CDT Apr 24, 2026

View Nearby Observations

Detailed Forecast

Saturday

S wind 13 to 16 kt becoming ESE in the afternoon. Mostly cloudy. Seas around 2 ft.

Saturday Night

E wind 9 to 15 kt becoming NNE after midnight. Showers likely and possibly a thunderstorm after 1am. Seas 2 to 3 ft.

Sunday

NE wind 20 to 22 kt. Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. Seas 2 to 3 ft.

Sunday Night

ENE wind 13 to 18 kt. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Seas 5 ft subsiding to 2 ft.

Monday

E wind 12 to 16 kt. Showers likely and possibly a thunderstorm. Seas around 2 ft.

Monday Night

E wind 12 to 15 kt. A chance of showers and thunderstorms, mainly before 1am. Seas 2 to 4 ft.

Tuesday

SE wind 10 to 14 kt. A chance of showers and thunderstorms. Seas around 2 ft.

Tuesday Night

SE wind 9 to 13 kt. Partly cloudy. Seas 2 to 3 ft.

Wednesday

SSE wind 9 to 14 kt. A slight chance of showers and thunderstorms after 1pm. Seas around 2 ft.

Winds and seas 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.