August Hilton Head Island Weather

Maintaining more or less the same average temperature of July with lows of 74 degrees and highs of 89 degrees, August also includes increased humidity and rainfall.

Although remaining rather warm, August is still as lovely  as ever. In fact, the temperature on the Island during this month drops ever so slightly by the day, easing towards the cooler fall season. The warm water temperatures make this the perfect time of year for sailing, watersports, and swimming off of South Carolina’s coast.

It’s a great month to take in some incredible views on a dolphin tour, and catch-up on some seasonal festivities before they end. These include Summer Jams at Shelter Cove Community Park, Gregg Russell family concerts in Sea Pines, and the weekly family-friendly event of the summer, Sunset Celebration. August is also your last opportunity to spy the nesting, endangered Loggerhead Sea Turtle. Plan a trip to the beach early morning for sunrise and a a chance to catch a glimpse of baby sea turtles making their first trek to the ocean.

August on Hilton Head Island is more damp than other months. With an average 12 days of showers and nearly 200 mm of rain, it’s best to plan your Island itinerary on a day to day basis. Not too worry though, it’ll be a warm rain. Afternoon storms can be a spectacular opportunity for an afternoon siesta.

Hazy days of summer indeed! Hilton Head receives almost 255 hours of sunlight during August. The sun’s rays are powerful this time of year. Be sure to slather on the sunscreen before hitting the trails or embarking on a sailing excursion.

August is the most humid time of the year on Hilton Head Island. Mornings bring up to 92 percent humidity that drops off to 61 percent by early afternoon. Dress in light layers and natural fabrics, or head straight to the beach or pool where swimwear and cover ups are the attire for the day.

High: 89℉Low: 74℉
Rainfall: 7.6 inches
Hilton Head Island
Hilton Head Island

4-Day Forecast

January 31


High: 70°F
Low: 57°F
POP: 25%
February 01


High: 70°F
Low: 55°F
POP: 80%
February 02


High: 66°F
Low: 51°F
POP: 84%
February 03


High: 55°F
Low: 38°F
POP: 94%