When to go · Sullivan's Island
Sullivan's Island in September
Great month. Inside Sullivan's Island's best window: Mar–May, Sep–Nov.
Key facts
- Verdict
- Great
- Temperature
- 28°C (82°F)82°F (28°C) / 20°C (68°F)68°F (20°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Sullivan's Island's best window: Mar–May, Sep–Nov.
Is another month better than September?
No other month rates higher than September for Sullivan's Island in this guide.
Weather in September
- Sullivan's IslandHighs around 28 °C (82 °F), lows around 20 °C (68 °F), rain on about 9 daysHighs around 82 °F (28 °C), lows around 68 °F (20 °C), rain on about 9 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
Compare two months
Weather, crowds and prices for any two months in Sullivan's Island, side by side.
Verdict
Sep: Great
Mar: Great
Daytime high
Sep: 28 °C (82 °F)82 °F (28 °C)
Mar: 19 °C (66 °F)66 °F (19 °C)
Night low
Sep: 20 °C (68 °F)68 °F (20 °C)
Mar: 8 °C (46 °F)46 °F (8 °C)
Rain days
Sep: 9
Mar: 9
Crowds
Sep: Medium
Mar: Medium
Prices
Sep: Medium
Mar: Medium
Festivals listed
Sep: 1
Mar: 2
September: Inside Sullivan's Island's best window: Mar–May, Sep–Nov.
March: Inside Sullivan's Island's best window: Mar–May, Sep–Nov.
Sullivan's Island: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.