Hilton Head Island, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

650
FXUS62 KCHS 251108
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
708 AM EDT Wed Mar 25 2026

.WHAT HAS CHANGED...
All sections have been updated.

&&

.KEY MESSAGES...
- 1) Temperatures warm to near-record values on Friday.

- 2) A dry cold front will move through Friday night, bringing a
  pattern change for this weekend.

&&

.DISCUSSION...
KEY MESSAGE 1: Temperatures warm to near-record values on
Friday.

As a broad ridge axis builds/expands across Texas, the region
falls under the eastern periphery of the upper level feature
with geopotential heights remaining fairly steady. At the
surface, a high pressure will be in the western Atlantic, with
temperatures expected to rise each day as warm 850mb
temperatures overspread the region. Afternoon highs around 70
are expected for today, upper 70s to mid 80s on Thursday, and
near-record upper 80s to around 90 on Friday, 5-10 degrees
cooler along the coast. Precipitation chances look to remain
low given the synoptic scale descent aloft.

KEY MESSAGE 2: A dry cold front will move through Friday night,
bringing a pattern change for this weekend.

A dry cold front will move through our region Friday night, quickly
shifting offshore into Saturday. High pressure will then pass to our
north late Saturday, then shift off the Mid-Atlantic Coast into
Sunday. Cooler temperatures will be ushered into our area behind the
front, with highs a few degrees below normal. They`ll range from the
mid to upper 60s across most of our counties, to the lower to middle
70s south of I-16 Saturday and Sunday. It`ll also be breezy Friday
night into Saturday. We may need a Lake Wind Advisory for Moultrie
during this time period. Additionally, afternoon RH values could
drop into the teens and 20s inland on Saturday, so we could have
fire weather concerns. Afternoon RH values could be even lower on
Sunday, though winds shouldn`t be as gusty.

&&

.AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
Prior to the 12Z TAFs, satellite and observations indicated
MVFR ceilings across KCHS, KJZI, and KSAV. The restrictive
ceilings over KCHS and KJZI are forecast to end by mid-day.
MVFR ceilings over KSAV may linger 20Z, however, ceilings may
begin to fracture between 16-20Z highlighted with a TEMPO. A
weak sea breeze may push across the terminals this afternoon,
resulting winds shifting from the east. Winds should become
light and variable after sunset. Thinning cloud cover and light
winds may support the formation of patchy fog late tonight. At
this time, the KCHS and KSAV TAFs will indicate ground fog
reducing visibility to 6SM by 10Z.

Extended Aviation Outlook: VFR. Expect gusty winds behind a
dry cold front on Saturday.

&&

.MARINE...
Northeast winds should continue to produce gusts to around 25 kts
early this morning. Winds will decrease through the day as high
pressure builds across the marine zones. However, wave heights may
remain six ft or greater this morning, then should subside from
north to south across the waters. Small Craft Advisories will
highlight the wind and wave height conditions through much of the
day, outside the Charleston Harbor. Six foot seas are forecast to
diminish across the outer GA waters this evening, with the last
Small Craft Advisory for the outer GA waters ending at midnight.
High pressure will likely linger across the marine zones through
the rest of the work week.

Extended Marine: A dry cold front will move through our region
Friday night, quickly shifting offshore into Saturday. High pressure
will then pass to our north late Saturday, then shift off the Mid-
Atlantic Coast into Sunday. Expect gale conditions across all of our
waters early Saturday, followed by near gale conditions later
Saturday into Sunday. Conditions will gradually improve on Monday.
Though, seas could stay elevated across the GA waters beyond 20 nm
into Tuesday.

&&

.CLIMATE...
Record High Temperatures:

March 27:
KCHS: 87/2021
KCXM: 81/2021
KSAV: 89/2021

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory until 2 PM EDT this afternoon for AMZ350.
     Small Craft Advisory until 5 PM EDT this afternoon for AMZ352.
     Small Craft Advisory until 8 PM EDT this evening for AMZ354.
     Small Craft Advisory until midnight EDT tonight for AMZ374.

&&

$$

MS/NED