North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

520
FXUS62 KCHS 280251
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
1051 PM EDT Sat Jun 27 2026

.WHAT HAS CHANGED...
Minor changes made for ongoing trends in Key Message 1 and the
Aviation Section.

&&

.KEY MESSAGES...
- 1) Hot and humid conditions will occur this weekend and into
  Monday, with Sunday temperatures near 100 degrees in some
  locations. Heat Advisories could be needed on Sunday.

- 2) Temperatures will decrease to near normal for the middle of
  next week, then the heat returns for the end of next week.
  Rainfall chances gradually decrease throughout next week.

&&

.DISCUSSION...
KEY MESSAGE 1: Hot and humid conditions will occur this weekend
and into Monday, with Sunday temperatures near 100 degrees in
some locations. Heat Advisories could be needed on Sunday.

Tonight: Overnight lows will challenge record high minimums at
some of the local climate sites, only dropping into the 70s. This
will provide little relief from the heat heading into Sunday,
which is forecast to be the warmer of the days this weekend.

Sunday: The only synoptic change is a slight shift in the
surface high pressure while ridging holds aloft, which will
yield a more westerly surface wind across the local area. This
will likely keep the sea breeze pinned along the coastline until
later in the afternoon allowing temperatures to warm into the
upper 90s and maybe even touch 100 in a few spots. A pinned sea
breeze will also lower the chances of afternoon convection,
with only isolated coverage anticipated. Given the humid airmass
in place along with the warm temperatures, heat index values
will likely reach to 100-105 west of I-95 and 105-110 along the
coastal corridor. At this juncture a Heat Advisory has not been
issued for the coastal counties as confidence is too low that
criteria (>108 heat index values) will be reached for 2 hours or
more. The need for a Heat Advisory will be reevaluated with
future forecast updates.

Monday: The ridging aloft will persist into Monday while at the
surface a weak front will stall off the southeast coastline. Another
hot day is forecast, with temperatures reaching into the mid 90s
once again. Combined with dewpoints in the 70s heat index values
will be in the 103-110 range. With the stalled front off the
southeast coast an increase in shower/thunderstorm coverage is
anticipated, with the forecast featuring scattered to widespread
PoPs in the afternoon. Given the higher coverage of convection a
Heat Advisory is unlikely, as the showers/thunderstorms will inhibit
temperatures from reaching their full potential. While widespread
severe weather is not anticipated, strong to marginally severe
storms are possible especially along boundary interactions.

KEY MESSAGE 2: Temperatures will decrease to near normal for the
middle of next week, then the heat returns for the end of next week.
Rainfall chances gradually decrease throughout next week.

Ridging aloft will remain the dominant synoptic feature next week.
Initially centered over the TN Valley early in the week and then
shifting eastward towards the East Coast by the end of the week.
Temperatures are forecast to moderate to near normal values in the
middle of the week before warming to above normal as the ridge
shifts eastward towards the end of the week. High temperatures could
again reach into the mid to upper 90s, which combined with dewpoint
values in the 70s will likely yield heat index values in the 100-110
range. Heat Advisories could be required for portions of the
forecast area at the end of the week and into the holiday
weekend.

&&

.AVIATION /02Z SUNDAY THROUGH THURSDAY/...
Expect VFR conditions to generally prevail at CHS/JZI/SAV
terminals through 00Z Monday. A few thunderstorms could approach
the CHS/JZI terminals from the northwest mid-late afternoon
into early evening Sunday, with confidence slightly higher in
impacting the CHS terminal. A PROB30 group for 5SM/-TSRA has
been introduced at CHS between 20-24Z Sunday as a result.

Extended Aviation Outlook: Showers and thunderstorms may lead to
flight restrictions, especially from Monday afternoon into
Monday night as a front moves toward the area. Some flight
restrictions are possible due to these storms. Brief restrictions
are also possible due to convection Tuesday afternoon.

&&

.MARINE...
Through Tonight: A typical summertime pattern will persist across
the marine waters. South/southwest winds will remain elevated
along the coastline overnight, with gusts generally in the 15-20
kt range, although gusts could be few kt higher into early evening.
Seas will range between 2-4 ft.

Sunday: Surface High pressure over the Atlantic will cause backing
of the winds during the afternoon. The highest winds will be along
the land/sea interface with the formation of the sea breeze. Gusts
to 20 or briefly 25 kt will be possible, especially as the sea
breeze crosses through the Charleston Harbor. At night, winds will
veer and gradually ease.

Monday through Wednesday: Expect weak winds on Monday as a
prefrontal trough moves into our area. Winds then shift to the NE by
early Tuesday, where they`ll prevail into Wednesday.

Rip Currents: Gusty winds with the afternoon sea breeze and a 2-3 ft
swell at 8-9 seconds will generate a Moderate Risk of rip currents
at all of our beaches this weekend.

&&

.CLIMATE...
Record High Temperatures:

June 28:
KCHS: 99/1998
KSAV: 100/1998

July 3:
KCHS: 98/2019

Record High Minimum Temperatures:

June 27:
KCHS: 77/2015

June 28:
KCHS: 78/2013
KCXM: 81/1998

June 29:
KCHS: 79/1977

July 1:
KCHS: 77/2024

July 3:
KCHS: 78/2016

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.

&&

$$