Weather forecast for 10 daysPort Isabel, TX

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 72°F
  • 63°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 27mphN 349°
  • Humidity: 59%
  • UV index: 7
  • Sunrise: 7:28 am CDT
  • Sunset: 6:59 pm CDT
  • ▼
On Saturday, October 17, occasional gusty winds will sweep through a partly cloudy sky.
Day and night temperatures will subtly differ, ranging from a peak of a delightful 71.6°F to a low of a comfortable 62.6°F.
The predicted temperature of 71.6°F resembles November's typical high of 74.7°F more than October's.
Sunrise was at 7:28 am and sunset will be at 6:59 pm; the daylight will last for 11h and 31min.

Sunday Oct 18, 2026

  • 77°F
  • 72°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 16mphNNW 346°
  • Humidity: 64%
  • UV index: 5
  • Sunrise: 7:29 am CDT
  • Sunset: 6:58 pm CDT
  • ▼
Tomorrow, on Sunday, October 18, clouds will blanket the sky, reducing sunshine.
Minor variations in temperature are expected, peaking at a moderately hot 77°F and slightly dropping to a low of a pleasant 71.6°F.
Tomorrow, the expected high will be a couple of degrees lower than the average October maximum of 81.9°F.
Sunrise will be at 7:29 am and sunset at 6:58 pm; tomorrow's daylight will last for 11h and 29min.

10-day overview

Daily temperatures

Warmest period: Saturday - Monday 86°C.
Coldest day: today 72°C.

Chance of precipitation

Highest chance: Monday 53%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 72°F
  • 63°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 27mphN 349°
  • Humidity: 59%
  • UV index: 7
  • Sunrise: 7:28 am CDT
  • Sunset: 6:59 pm CDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 77°F
  • 72°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 16mphNNW 346°
  • Humidity: 64%
  • UV index: 5
  • Sunrise: 7:29 am CDT
  • Sunset: 6:58 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 81°F
  • 73°F
AM Showers
AM Showers
  • Precip. probability: 53%
  • Precipitation: 0.12"
  • Wind: 14mphNE 38°
  • Humidity: 71%
  • UV index: 5
  • Sunrise: 7:30 am CDT
  • Sunset: 6:57 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 82°F
  • 73°F
PM Showers
PM Showers
  • Precip. probability: 35%
  • Precipitation: 0.16"
  • Wind: 15mphNE 39°
  • Humidity: 72%
  • UV index: 8
  • Sunrise: 7:30 am CDT
  • Sunset: 6:56 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 84°F
  • 72°F
AM Showers
AM Showers
  • Precip. probability: 39%
  • Precipitation: 0.08"
  • Wind: 15mphENE 59°
  • Humidity: 70%
  • UV index: 8
  • Sunrise: 7:31 am CDT
  • Sunset: 6:55 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 84°F
  • 72°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphENE 57°
  • Humidity: 63%
  • UV index: 8
  • Sunrise: 7:31 am CDT
  • Sunset: 6:54 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 84°F
  • 73°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphESE 102°
  • Humidity: 61%
  • UV index: 8
  • Sunrise: 7:32 am CDT
  • Sunset: 6:53 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 86°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 15mphSE 127°
  • Humidity: 61%
  • UV index: 8
  • Sunrise: 7:32 am CDT
  • Sunset: 6:53 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 86°F
  • 75°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 16mphESE 116°
  • Humidity: 62%
  • UV index: 6
  • Sunrise: 7:33 am CDT
  • Sunset: 6:52 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 86°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 15mphESE 118°
  • Humidity: 65%
  • UV index: 7
  • Sunrise: 7:34 am CDT
  • Sunset: 6:51 pm CDT
  • ▼
Models point to a combination of gloomy, rain-soaked and mostly clear weather is predicted.
Rainfall is anticipated on Monday through Wednesday.
The temperature will vary considerably over the next several days. The maximum temperature will vary between 71.6°F and 86°F, while the lowest night temperatures will vary also significantly, as the overnight lows will vary from 62.6°F to 77°F.
Next Saturday through next Monday, with the highest temperature of 86°F, will be the hottest days; today is the coldest day, with a maximum temperature of 71.6°F.
Taking the humidity into consideration, the maximum feel-like temperature may increase and vary between 71.6°F and a tropical 93.2°F.
Updated: Oct 17, 2026 @ 14:22:05 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in Port Isabel, wind-swept clouds will drift across the sky, making for a partly cloudy and breezy day.

Today, the highest temperature will be 71.6°F, while the lowest temperature will be 62.6°F.
The maximum temperature today will be noticeably lower than the average highest temperature of 81.9°F in October. The lowest temperature today will be also noticeably lower than the average low of 76.1°F.

On Saturday, in Port Isabel, sunrise was at 7:28 am and sunset will be at 6:59 pm (CDT).

In Port Isabel, today, there will be 11h and 31min of daylight.

Tomorrow, in Port Isabel, limited brightness is expected due to persistent clouds.

Tomorrow, the maximum temperature will be 77°F, while the minimum temperature will be 71.6°F.
The maximum temperature will be moderately lower than the average highest temperature of 81.9°F in October. The lowest temperature will be also a couple of degrees lower than the average low of 76.1°F.

On Sunday, in Port Isabel, sunrise will be at 7:29 am and sunset at 6:58 pm (CDT).

In Port Isabel, the length of the day tomorrow will be 11h and 29min.