Marine Weather and Tide Forecast for North Charleston, SC
 | Sunrise 7:25 AM Sunset 7:30 PM Moonrise 6:07 AM Moonset 6:22 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
AMZ330 Charleston Harbor- 234 Am Edt Wed Mar 18 2026
Rest of tonight - N winds 5 to 10 kt.
Wed - NE winds 5 to 10 kt.
Wed night - NE winds 5 kt.
Thu - NE winds 5 to 10 kt.
Thu night - E winds 5 kt in the evening, becoming light and variable.
Fri - Variable winds 5 kt.
Fri night - S winds 5 kt.
Sat - SW winds 5 to 10 kt.
Sat night - SW winds 5 to 10 kt.
Sun - SW winds 5 to 10 kt.
Sun night - SW winds 10 kt.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 60 degrees.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 60 degrees.
AMZ300 234 Am Edt Wed Mar 18 2026
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - High pressure will prevail through the weekend. A cold front may drop through the area early next week.
7 Day Forecast for Marine Location Near North Charleston, SC
NEW! Add second zone forecast
| Drayton Click for Map Wed -- 02:39 AM EDT -0.32 feet Low Tide Wed -- 07:06 AM EDT Moonrise Wed -- 07:26 AM EDT Sunrise Wed -- 08:54 AM EDT 5.99 feet High Tide Wed -- 03:01 PM EDT -0.40 feet Low Tide Wed -- 07:21 PM EDT Moonset Wed -- 07:30 PM EDT Sunset Wed -- 09:06 PM EDT 6.22 feet High Tide Wed -- 09:26 PM EDT New Moon Tide / Current data from XTide NOT FOR NAVIGATION |
Drayton, Bee's Ferry, Ashley River, South Carolina, Tide feet
| 12 am |
| 2.2 |
| 1 am |
| 0.8 |
| 2 am |
| -0.1 |
| 3 am |
| -0.3 |
| 4 am |
| 0.5 |
| 5 am |
| 1.9 |
| 6 am |
| 3.6 |
| 7 am |
| 4.9 |
| 8 am |
| 5.7 |
| 9 am |
| 6 |
| 10 am |
| 5.6 |
| 11 am |
| 4.5 |
| 12 pm |
| 3 |
| 1 pm |
| 1.3 |
| 2 pm |
| 0.1 |
| 3 pm |
| -0.4 |
| 4 pm |
| 0.1 |
| 5 pm |
| 1.4 |
| 6 pm |
| 3.2 |
| 7 pm |
| 4.8 |
| 8 pm |
| 5.8 |
| 9 pm |
| 6.2 |
| 10 pm |
| 6 |
| 11 pm |
| 5 |
Tide / Current for Drayton, Railroad Bridge, Ashley River, Charleston Harbor, South Carolina Current
| Drayton Click for Map Flood direction 310 true Ebb direction 130 true Wed -- 03:04 AM EDT 0.00 knots Slack Wed -- 05:44 AM EDT 2.00 knots Max Flood Wed -- 07:06 AM EDT Moonrise Wed -- 07:26 AM EDT Sunrise Wed -- 09:37 AM EDT -0.00 knots Slack Wed -- 11:41 AM EDT -3.21 knots Max Ebb Wed -- 03:24 PM EDT 0.00 knots Slack Wed -- 06:02 PM EDT 2.15 knots Max Flood Wed -- 07:21 PM EDT Moonset Wed -- 07:30 PM EDT Sunset Wed -- 09:26 PM EDT New Moon Wed -- 09:53 PM EDT -0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Drayton, Railroad Bridge, Ashley River, Charleston Harbor, South Carolina Current, knots
| 12 am |
| -2.8 |
| 1 am |
| -2.2 |
| 2 am |
| -1.2 |
| 3 am |
| -0.1 |
| 4 am |
| 1 |
| 5 am |
| 1.8 |
| 6 am |
| 2 |
| 7 am |
| 1.7 |
| 8 am |
| 1.4 |
| 9 am |
| 0.7 |
| 10 am |
| -0.8 |
| 11 am |
| -2.7 |
| 12 pm |
| -3.2 |
| 1 pm |
| -2.7 |
| 2 pm |
| -1.7 |
| 3 pm |
| -0.5 |
| 4 pm |
| 0.7 |
| 5 pm |
| 1.8 |
| 6 pm |
| 2.1 |
| 7 pm |
| 1.9 |
| 8 pm |
| 1.5 |
| 9 pm |
| 0.9 |
| 10 pm |
| -0.2 |
| 11 pm |
| -2.3 |
FXUS62 KCHS 180633 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 233 AM EDT Wed Mar 18 2026
WHAT HAS CHANGED
Key Message 1, the Aviation section, and the Marine section have all been updated.
KEY MESSAGES
- 1) Freezing temperatures will occur over much of the area this morning and frost is possible tonight.
DISCUSSION
KEY MESSAGE 1: Freezing temperatures will occur over much of the area this morning and frost is possible tonight.
Many of our observation sites across the inland two thirds of the area have already dipped to 30-32 degrees as of 2am. The ongoing Freeze Warning looks on track, with a light freeze occurring over most of southern SC and southeast GA away from the coast.
Decent radiational cooling is expected again tonight. Current low temp forecast shows mid-30s over far inland areas. There is a chance that some mid-level clouds will disrupt the cooling. If not, we could see patchy to scattered frost in some areas. A Frost Advisory may eventually be needed.
AVIATION /06Z WEDNESDAY THROUGH SUNDAY/
VFR conditions will prevail at KCHS, KJZI, and KSAV through 06z Thursday.
Extended Aviation Outlook: VFR conditions are expected to prevail.
MARINE
Today through Sunday: Overall, wind and sea conditions are expected to remain below Small Craft Advisory thresholds through the weekend. There will likely be a few periods where winds increase into the 15-20 knot range for portions of the waters including today, Thursday, and then again Saturday into Sunday.
Model guidance suggests that seas could get to near 6 feet in the outer portion of the outer GA waters beginning Thursday morning and it's possible we could need a marginal Small Craft Advisory then.
EQUIPMENT
Radome panel replacement maintenance has started at the KCLX radar and is scheduled to continue through Friday March 20th.
The radar will be down during this time. Users are encouraged to use data from the following nearby radar sites during the maintenance outage:
KCAE - Columbia, SC KLTX - Wilmington, NC KJAX - Jacksonville, FL KVAX - Moody AFB, GA KJGX - Robbins AFB, GA
CHS WATCHES/WARNINGS/ADVISORIES
GA...Freeze Warning until 10 AM EDT this morning for GAZ087-088- 099>101-114>116-118-137-138-140.
SC...Freeze Warning until 10 AM EDT this morning for SCZ040-042>045- 047-049-050-052.
MARINE...None.
Area Forecast Discussion National Weather Service Charleston SC 233 AM EDT Wed Mar 18 2026
WHAT HAS CHANGED
Key Message 1, the Aviation section, and the Marine section have all been updated.
KEY MESSAGES
- 1) Freezing temperatures will occur over much of the area this morning and frost is possible tonight.
DISCUSSION
KEY MESSAGE 1: Freezing temperatures will occur over much of the area this morning and frost is possible tonight.
Many of our observation sites across the inland two thirds of the area have already dipped to 30-32 degrees as of 2am. The ongoing Freeze Warning looks on track, with a light freeze occurring over most of southern SC and southeast GA away from the coast.
Decent radiational cooling is expected again tonight. Current low temp forecast shows mid-30s over far inland areas. There is a chance that some mid-level clouds will disrupt the cooling. If not, we could see patchy to scattered frost in some areas. A Frost Advisory may eventually be needed.
AVIATION /06Z WEDNESDAY THROUGH SUNDAY/
VFR conditions will prevail at KCHS, KJZI, and KSAV through 06z Thursday.
Extended Aviation Outlook: VFR conditions are expected to prevail.
MARINE
Today through Sunday: Overall, wind and sea conditions are expected to remain below Small Craft Advisory thresholds through the weekend. There will likely be a few periods where winds increase into the 15-20 knot range for portions of the waters including today, Thursday, and then again Saturday into Sunday.
Model guidance suggests that seas could get to near 6 feet in the outer portion of the outer GA waters beginning Thursday morning and it's possible we could need a marginal Small Craft Advisory then.
EQUIPMENT
Radome panel replacement maintenance has started at the KCLX radar and is scheduled to continue through Friday March 20th.
The radar will be down during this time. Users are encouraged to use data from the following nearby radar sites during the maintenance outage:
KCAE - Columbia, SC KLTX - Wilmington, NC KJAX - Jacksonville, FL KVAX - Moody AFB, GA KJGX - Robbins AFB, GA
CHS WATCHES/WARNINGS/ADVISORIES
GA...Freeze Warning until 10 AM EDT this morning for GAZ087-088- 099>101-114>116-118-137-138-140.
SC...Freeze Warning until 10 AM EDT this morning for SCZ040-042>045- 047-049-050-052.
MARINE...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| CHTS1 | 8 mi | 58 min | NNW 5.1G | 43°F | 60°F | 30.23 | ||
| 41029 - Capers Nearshore (CAP 2) | 23 mi | 170 min | N 9.7G | 48°F | 58°F | 30.24 | 29°F | |
| 41065 | 23 mi | 88 min | 57°F | 1 ft | ||||
| ACXS1 - ACE Basin Reserve, SC | 29 mi | 73 min | 0 | 34°F | 30.21 | 32°F | ||
| 41066 | 30 mi | 50 min | NNE 9.7G | 49°F | 30.20 | 28°F | ||
| 41076 | 30 mi | 78 min | 60°F | 2 ft | ||||
| 41033 | 44 mi | 50 min | N 9.7G | 50°F | 60°F | 30.21 | 28°F | |
| 41067 | 44 mi | 68 min | 59°F | 1 ft |
Wind History for Charleston, SC
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KCHS CHARLESTON AFB/INTL,SC | 3 sm | 62 min | NNW 09 | 10 sm | A Few Clouds | 32°F | 28°F | 86% | 30.24 | |
| KJZI CHARLESTON EXECUTIVE,SC | 11 sm | 43 min | calm | 10 sm | Clear | 32°F | 30°F | 93% | 30.23 | |
| KLRO MT PLEASANT RGNLFAISON FIELD,SC | 15 sm | 43 min | N 03 | 5 sm | Clear | Haze | 36°F | 32°F | 87% | 30.23 |
| KDYB SUMMERVILLE,SC | 19 sm | 43 min | calm | 10 sm | A Few Clouds | 34°F | 32°F | 93% | 30.24 | |
| KMKS BERKELEY COUNTY,SC | 23 sm | 43 min | NNE 06 | 10 sm | Clear | 36°F | 23°F | 60% | 30.24 |
Link to 1 hour of 5 minute data for KCHS
Terminal Aerodrome Forecast (TAF) for KCHS
Wind History Graph: CHS
(wind in knots)
GEOS Local Image of southeast
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Charleston, SC,
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