Galveston weather in August 2025

Expect daytime maximum temperatures of 88°F in Galveston, Texas in August and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 4.3 inches of rainfall in the month.

  • 88°F maximum daytime temperature in August in Galveston88
    88°F max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in August in Galveston9
    9 days with some rainfall
  • 79°F minimum night-time temperature in August in Galveston79
    79°F min night temperature
  • 13 hours of daylight per day in August in Galveston13
    13 hours of daylight per day
  • Very high heat & humidity in August in GalvestonVH
    Very High heat & humidity
  • 4.3 inches monthly rainfall in August in Galveston4.3
    4.3 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Galveston10
    10 (Very High) UV index
  • 86°F sea temperature in August in Galveston86
    86°F sea temperature

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The August weather guide for Texas (Galveston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Galveston in August?

Daytime temperatures usually reach 88°F in Galveston in August with very high heat and humidity, falling to 79°F at night.

How sunny is it in Galveston in August?

There are normally 9 hours of bright sunshine each day in Galveston in August - that's 68% of daylight hours.

How warm is the sea around Galveston in August?

The average sea temperature around Galveston in August is 86°F.

Does it rain in Galveston in August?

There are usually 9 days with some rain in Galveston in August and the average monthly rainfall is 4.3 inches.

What is the chance of a hurricane in Galveston in August?

On average less than 1 day in August in Galveston is likely to be affected by the passage of one or more tropical storms.

Galveston August sunrise & sunset times

Browse the sunrise and sunset times for Galveston in August 2025. Select a month to view Galveston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:40 19:11
Saturday, 16th August 2025 05:48 18:58
Sunday, 31st August 2025 05:56 18:42

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