Hilton Head Weather in August
Still peak. Hottest water of the year, soggy afternoons, and the front edge of hurricane season.
August is July with more rain. Water stays at 84°F (still peak), afternoons stay above 88°F, but rainfall jumps and the first hurricane outlooks start to matter late month. The last two weeks see real rate softening as families return to school.
The data, at a glance.
- Avg high
- 89°F
- Avg low
- 73°F
- Ocean temp
- 84°F
- Rainy days
- 13
- Rainfall
- 6.6”
- Humidity
- 75-90%
- Sunset
- 8:00 p.m.
- Daylight
- 13 hours 30 min
- Crowd level
- Peak through mid-August, dropping late month
- Rate vs July
- 95%
What August feels like on Hilton Head
Heaviest of the year for humidity. Pop-up storms run throughout the day, not just at 3-5 p.m. The Atlantic remains bath-warm. By mid-August, the late-summer melancholy creeps in — cicadas, longer evening shadows, and the first signs that the island is getting ready to exhale into September.
Yes if you are tied to the school calendar. Late August (Aug 17-31) softens noticeably as families head home; you can sometimes find resort discounts in the last week. Hurricane risk is still low this early but trip insurance is worth considering for stays after Aug 20.
Best for
- Late-summer family trips
- Last-week-before-school escapes
- Peak ocean conditions (84°F water)
- Wedding-week multi-generational rentals
Watch out for
- Wettest month of the year (6.6 inches)
- Hurricane risk begins to climb late month
- Heat index regularly above 100°F
What’s open in August
Everything still at peak. Full staffing through Labor Day weekend (Sept 5-7, 2026). After Labor Day, the seasonal scale-back begins.
What to pack for Hilton Head in August
Same as July. Multiple swimsuits, sun shirts, sunscreen, water shoes, light rain shell. The shell is more useful than in July because rain is more frequent. Pack DEET; mosquitoes are at their worst.
Best things to do on Hilton Head in August
- Peak ocean conditions for swimming and boogie boarding
- Sunset sails (sunset slightly earlier, 8 p.m.)
- Indoor museum or rainy-afternoon Coastal Discovery Museum visit
- Offshore fishing charters (good late-summer bite)
- Late-month deal hunting on resort rooms
- Wedding weekend logistics (peak wedding month)
When to book for August
First two weeks book like July (5-6 months out). Late August (after Aug 17) opens up significantly; deals appear inside 4-6 weeks. Trip insurance for late-August bookings is recommended (5-7% of trip total).
Hilton Head August questions we hear most.
- Is August a good time to visit Hilton Head?
- Yes for families locked into the school calendar. Ocean is at peak temperature (84°F), but rainfall is the highest of the year (6.6 inches across 13 days). The last two weeks of August soften noticeably and offer the first late-summer deals.
- Is August hurricane season on Hilton Head?
- Atlantic hurricane season runs June 1-November 30, but actual risk to Hilton Head is concentrated late August through mid-October. August carries low-but-rising risk; the historical peak is around September 10. Trip insurance for late-August stays is worth considering.
- Is the ocean warm in August?
- Yes — 84°F, the warmest of the year along with July. Bath-warm and inviting. Best month for long ocean swims, boogie boarding, and water-based activities for kids who like extended swim sessions.
- Are restaurants busy in late August?
- Less so than mid-August. The week after Labor Day brings real relief. Through the first half of the month, S-tier restaurants still need 2-3 weeks lead time. The last week of August often has Friday/Saturday slots open inside 1-2 weeks.
For the full year-round picture, see the Hilton Head weather guide and best time to visit.
