Port Isabel Weather Forecast 15 Days, Weather in Port Isabel Today
Current weather conditions and 15 day weather forecast for Port Isabel, Texas, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Port Isabel
| 15 December 2025 Monday 16.1 ° C / 61°F  Light rain |
Feels Like : 16.1 ° C / 61°F Humidity : % 90 Pressure : 1029 mb Wind Speed : 39.6 kmph / 24.6 miles from NNE  Visibility : 6.4 km Precipitation (rainfall) : 0.03 mm Cloud (%) : 100 |
15 day weather forecast for Port Isabel, TX, USA
Weather Forecast for next 15 Days for Port Isabel including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Port Isabel, Texas state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 December 2025 Sunday |  Patchy rain nearby |
17.3 ° C (63.1°F) |
21.5 ° C (70.7°F) |
20.4 ° C (68.7°F) |
% 92 | 88% | 0.7 | Sunrise:07:08 AM Sunset: 05:39 PM |
Moonrise:02:28 AM Moonset: 01:58 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday | Patchy rain nearby |
13.7 ° C (56.7°F) |
16.2 ° C (61.2°F) |
15.5 ° C (60°F) |
% 86 | 88% | 0.5 | Sunrise:07:09 AM Sunset: 05:40 PM |
Moonrise:03:21 AM Moonset: 02:30 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Overcast |
16.9 ° C (62.3°F) |
21.6 ° C (70.8°F) |
19.8 ° C (67.7°F) |
% 85 | 0% | 0.5 | Sunrise:07:09 AM Sunset: 05:40 PM |
Moonrise:04:15 AM Moonset: 03:05 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Patchy rain nearby |
18 ° C (64.4°F) |
19.3 ° C (66.8°F) |
20.1 ° C (68.1°F) |
% 91 | 82% | 0.7 | Sunrise:07:10 AM Sunset: 05:41 PM |
Moonrise:05:10 AM Moonset: 03:45 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Patchy rain nearby |
22.4 ° C (72.4°F) |
25.2 ° C (77.4°F) |
23.6 ° C (74.4°F) |
% 83 | 73% | 0.9 | Sunrise:07:10 AM Sunset: 05:41 PM |
Moonrise:06:06 AM Moonset: 04:29 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Patchy rain nearby |
22.2 ° C (72°F) |
24.4 ° C (76°F) |
23.1 ° C (73.5°F) |
% 88 | 88% | 0 | Sunrise:07:11 AM Sunset: 05:41 PM |
Moonrise:07:01 AM Moonset: 05:19 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Partly Cloudy |
22.8 ° C (73°F) |
24.9 ° C (76.7°F) |
23.7 ° C (74.6°F) |
% 87 | 0% | 6 | Sunrise:07:11 AM Sunset: 05:42 PM |
Moonrise:07:53 AM Moonset: 06:13 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Patchy rain nearby |
20.5 ° C (69°F) |
26.1 ° C (79°F) |
23.9 ° C (75.1°F) |
% 84 | 74% | 5 | Sunrise:07:12 AM Sunset: 05:42 PM |
Moonrise:08:40 AM Moonset: 07:11 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Patchy rain nearby |
18.3 ° C (64.9°F) |
19 ° C (66.2°F) |
19 ° C (66.2°F) |
% 80 | 89% | 4 | Sunrise:07:12 AM Sunset: 05:43 PM |
Moonrise:09:24 AM Moonset: 08:09 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Patchy rain nearby |
20.1 ° C (68.2°F) |
22.6 ° C (72.7°F) |
21.5 ° C (70.7°F) |
% 83 | 79% | 5 | Sunrise:07:13 AM Sunset: 05:43 PM |
Moonrise:10:02 AM Moonset: 09:07 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Patchy rain nearby |
21.7 ° C (71°F) |
23.3 ° C (73.9°F) |
22.5 ° C (72.4°F) |
% 89 | 80% | 5 | Sunrise:07:13 AM Sunset: 05:44 PM |
Moonrise:10:37 AM Moonset: 10:04 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Patchy rain nearby |
21.8 ° C (71.2°F) |
23.1 ° C (73.5°F) |
22.4 ° C (72.3°F) |
% 85 | 88% | 5 | Sunrise:07:14 AM Sunset: 05:45 PM |
Moonrise:11:10 AM Moonset: 11:02 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Sunny |
21 ° C (69.8°F) |
23.3 ° C (74°F) |
22 ° C (71.6°F) |
% 77 | 0% | 6 | Sunrise:07:14 AM Sunset: 05:45 PM |
Moonrise:11:41 AM Moonset: 11:59 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Partly Cloudy |
21.8 ° C (71.2°F) |
24.4 ° C (75.8°F) |
22.8 ° C (73.1°F) |
% 83 | 0% | 6 | Sunrise:07:15 AM Sunset: 05:46 PM |
Moonrise:12:13 PM Moonset: No moonset Moon Phase ( First Quarter ) |
|
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