Myrtle Beach weather in September 2025

Expect 84°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Myrtle Beach in September. Check more long-term weather averages for Myrtle Beach in September before you book your next holiday to South Carolina in 2025/2026.

  • 84°F maximum daytime temperature in September in Myrtle Beach84
    84°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Myrtle Beach9
    9 days with some rainfall
  • 64°F minimum night-time temperature in September in Myrtle Beach64
    64°F min night temperature
  • 12 hours of daylight per day in September in Myrtle Beach12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Myrtle BeachM
    Moderate heat & humidity
  • 5.5 inches monthly rainfall in September in Myrtle Beach5.5
    5.5 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Myrtle Beach8
    8 (Very High) UV index
  • 79°F sea temperature in September in Myrtle Beach79
    79°F sea temperature

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The September weather guide for South Carolina (Myrtle Beach) 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 Myrtle Beach in September?

Daytime temperatures usually reach 84°F in Myrtle Beach in September with moderate heat and humidity, falling to 64°F at night.

How sunny is it in Myrtle Beach in September?

There are normally 8 hours of bright sunshine each day in Myrtle Beach in September - that's 61% of daylight hours.

How warm is the sea around Myrtle Beach in September?

The average sea temperature around Myrtle Beach in September is 79°F.

Does it rain in Myrtle Beach in September?

There are usually 9 days with some rain in Myrtle Beach in September and the average monthly rainfall is 5.5 inches.

What is the chance of a hurricane in Myrtle Beach in September?

On average 1.3 days in September in Myrtle Beach are likely to be affected by the passage of one or more tropical storms.

Myrtle Beach September sunrise & sunset times

Browse the sunrise and sunset times for Myrtle Beach in September 2025. Select a month to view Myrtle Beach sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 18:41
Monday, 15th September 2025 05:59 18:21
Tuesday, 30th September 2025 06:09 18:01

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