Hilton Head Island, South Carolina Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Hilton Head Island weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Heavy Showers18%0.40″91°77°—
- MondayJul 6Overcast18%—93°78°+2°
- TuesdayJul 7Light Drizzle27%—97°74°+4°
- WednesdayJul 8Light Drizzle27%—96°75°-1°
- ThursdayJul 9Overcast16%—101°75°+5°
- FridayJul 10Overcast15%—98°77°-3°
- SaturdayJul 11Partly Cloudy27%—96°77°-2°
AQI 38 (Good), driven by PM2.5. AQI up 5 over the last 6 hours (gradual rise). PM2.5 at 9.3 µg/m³ (AQI 51) with a 0.90 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 0.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 35
- UV peak
- 0.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 9.3 µg/m³ (AQI 51) with a 0.90 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:35 PM
- Moonset
- 11:36 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Hilton Head Island at a glance
- Today vs. normal: 79°F — typical for the season
- Last frost: February 28 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 29926, 29928
15-Day Forecast — Hilton Head Island
- Sun91°77°18%
- Mon93°78°18%
- Tue97°74°27%
- Wed96°75°27%
- Thu101°75°16%
- Fri98°77°15%
- Sat96°77°27%
- Sun98°75°41%
- Mon89°73°36%
- Tue91°69°27%
- Wed93°71°23%
- Thu94°71°48%
- Fri88°71°46%
- Sat83°73°61%
- Sun90°71°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Hilton Head Island
SPC includes Hilton Head Island in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Hilton Head Island
- 29928
- 29926
- 29925
- 29938