August weather forecast
Port Isabel, TX

August, the last month of the summer in Port Isabel, is another hot month, with an average temperature fluctuating between 82°F (27.8°C) and 88°F (31.1°C).

Temperature

Port Isabel, Texas, experiences its highest average temperatures in August, reaching a peak of 88°F (31.1°C) and a minimum of 82°F (27.8°C).

Heat index

In August, the heat index is evaluated at a sweltering 102.2°F (39°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in August is 75%.

Rainfall

In Port Isabel, in August, during 12.2 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 143.2 rainfall days, and 21.38" (543mm) of precipitation is accumulated.

Ocean temperature

With an average ocean temperature of 85.1°F (29.5°C), August is the month with the warmest seawater in Port Isabel, Texas.
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

In August, the average length of the day is 13h and 2min.
On the first day of August in Port Isabel, sunrise is at 6:55 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 7:49 pm CDT.

Sunshine

In August, the average sunshine in Port Isabel is 10.3h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index in Port Isabel. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in August interprets into the following advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take caution! The UV rays from the Sun gain strength from sand and water reflections.