Marine Weather and Tide Forecast for Sullivan's Island, SC
 | Sunrise 6:44 AM Sunset 5:22 PM Moonrise 10:33 PM Moonset 12:16 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
AMZ330 Charleston Harbor- 439 Am Est Mon Nov 10 2025
.small craft advisory in effect from 3 pm est this afternoon through late tonight - .
Today - NW winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Tonight - NW winds 15 to 20 kt with gusts to 35 kt. Waves 1 to 2 ft.
Tue - W winds 10 to 15 kt.
Tue night - W winds 5 to 10 kt.
Wed - W winds 10 to 15 kt with gusts to 20 kt.
Wed night - W winds 10 to 15 kt.
Thu - W winds 5 to 10 kt.
Thu night - NE winds 5 kt.
Fri - NE winds 5 kt.
Fri night - S winds 5 kt.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 65 degrees.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 65 degrees.
AMZ300 439 Am Est Mon Nov 10 2025
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - A strong cold front will move through tonight, bringing much colder conditions to the area this week. High pressure will build into the region through the remainder of the week.
7 Day Forecast for Marine Location Near Sullivan's Island, SC
NEW! Add second zone forecast
| Charleston Click for Map Mon -- 05:16 AM EST 0.33 feet Low Tide Mon -- 06:45 AM EST Sunrise Mon -- 11:51 AM EST 6.30 feet High Tide Mon -- 12:15 PM EST Moonset Mon -- 05:21 PM EST Sunset Mon -- 06:10 PM EST 0.84 feet Low Tide Mon -- 10:33 PM EST Moonrise Tide / Current data from XTide NOT FOR NAVIGATION |
Charleston, South Carolina, Tide feet
| 12 am |
| 5 |
| 1 am |
| 4.3 |
| 2 am |
| 3.2 |
| 3 am |
| 2 |
| 4 am |
| 0.9 |
| 5 am |
| 0.4 |
| 6 am |
| 0.5 |
| 7 am |
| 1.5 |
| 8 am |
| 2.8 |
| 9 am |
| 4.2 |
| 10 am |
| 5.3 |
| 11 am |
| 6.1 |
| 12 pm |
| 6.3 |
| 1 pm |
| 5.9 |
| 2 pm |
| 4.9 |
| 3 pm |
| 3.6 |
| 4 pm |
| 2.3 |
| 5 pm |
| 1.3 |
| 6 pm |
| 0.9 |
| 7 pm |
| 1.1 |
| 8 pm |
| 1.8 |
| 9 pm |
| 2.8 |
| 10 pm |
| 3.7 |
| 11 pm |
| 4.5 |
| Charleston Harbor Entrance Click for Map Mon -- 02:49 AM EST -2.18 knots Max Ebb Mon -- 05:51 AM EST 0.00 knots Slack Mon -- 06:45 AM EST Sunrise Mon -- 08:26 AM EST 1.66 knots Max Flood Mon -- 12:15 PM EST Moonset Mon -- 12:22 PM EST -0.00 knots Slack Mon -- 03:32 PM EST -2.40 knots Max Ebb Mon -- 05:21 PM EST Sunset Mon -- 06:51 PM EST 0.00 knots Slack Mon -- 08:58 PM EST 1.17 knots Max Flood Mon -- 10:33 PM EST Moonrise Tide / Current data from XTide NOT FOR NAVIGATION |
Charleston Harbor Entrance, South Carolina Current, knots
| 12 am |
| -0.4 |
| 1 am |
| -1.3 |
| 2 am |
| -2 |
| 3 am |
| -2.2 |
| 4 am |
| -1.7 |
| 5 am |
| -0.8 |
| 6 am |
| 0.1 |
| 7 am |
| 1.1 |
| 8 am |
| 1.6 |
| 9 am |
| 1.6 |
| 10 am |
| 1.4 |
| 11 am |
| 1.1 |
| 12 pm |
| 0.4 |
| 1 pm |
| -0.7 |
| 2 pm |
| -1.6 |
| 3 pm |
| -2.3 |
| 4 pm |
| -2.3 |
| 5 pm |
| -1.7 |
| 6 pm |
| -0.8 |
| 7 pm |
| 0.1 |
| 8 pm |
| 0.9 |
| 9 pm |
| 1.2 |
| 10 pm |
| 1.1 |
| 11 pm |
| 0.9 |
FXUS62 KCHS 100607 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 107 AM EST Mon Nov 10 2025
SYNOPSIS
A strong cold front will move through tonight, bringing much colder conditions to the area this week. High pressure will build into the region through the remainder of the week.
NEAR TERM /UNTIL TUESDAY MORNING/
The cold front has pushed off into our near/offshore Atlantic waters, with cold-air advection (CAA) commencing on the backside as a surface high pressure builds down into the southeast. Expect breezy winds to develop throughout the rest of the overnight hours due to the CAA along with the increased surface pressure gradient.
This will result in northwest winds sustained 10 to 15 mph, with gusts into the mid 20s. While the cold temperatures will continue to pour into the region throughout the day, overnight lows this morning look to stay in the mid/upper 30s for inland areas and up into the lower/mid 40s along the coast. Ample sunshine this morning and afternoon will counteract the CAA, allowing for temperatures to rise into the lower to mid 50s across the area. However, winds will rise further becoming sustained 15 to 20 mph with gusts to near 30 mph by the late afternoon hours, resulting in a Lake Wind Advisory for Lake Moultrie from the afternoon hours into the early Tuesday morning.
Peak cold-air advection occurs during the evening hours, which will rapidly bring temperatures down into the lower to mid 30s prior to midnight, and further down into the mid 20s inland and lower 30s along the coast by daybreak. These low temperatures will challenge the record low temperatures at all three climate sites (see Climate section for more details,) with an area-wide Freeze Warning in affect. Winds will be strongest during the evening, weakening into the overnight period, but will still be breezy enough to result in minimum wind chills of 18 to 20 degrees F for inland southeast Georgia and portions of inland southeast South Carolina. Have thus issued a cold weather advisory given the criteria of 20 degrees F, so be sure to bundle up and wear appropriate clothing, a hat, and gloves when heading out Tuesday morning.
SHORT TERM /TUESDAY THROUGH THURSDAY/
Tuesday: Behind a departing cold front, strong CAA continues to dominate much of the forecast on Tuesday as temperatures struggle to reach into the low 50s. A Freeze Warning has been issued for the entire forecast area as confidence remains high in a widespread freeze occurring Monday night until Tuesday morning (~9AM).
Additionally, due to wind chill values in the upper teens to low 20s across counties west of I-95, a Cold Weather Advisory has been issued beginning at midnight on Tuesday until early Tuesday morning (~8AM). This will cause for temperatures to battle for record low maximum temperatures on Tuesday at all three climate sites - see Climate section for more details. Otherwise, breezy northwesterly winds will slowly diminish throughout the morning, and winds will range from 5 to 10 mph by the afternoon. Clear skies and relatively calm winds will allow for another chilly night with temperatures dropping into the upper 20s inland and upper 30s to low 40s along the coastline.
Wednesday and Thursday: A mid-level trough will push off the coastline on Wednesday and allow for zonal wind flow aloft to take over on Wednesday and Thursday. Heights should slowly rise as the center of a high pressure sits over the Southeast. In response, temperatures should warm back up into the mid to upper 60s on Wednesday and upper 60s to low 70s on Thursday. A rain-free forecast has been maintained as the atmosphere remains dry with PWATs near and below half an inch. Model guidance continues to indicate that a dry, cold front will push across the region on Thursday morning, but not much impact with this besides a subtle wind shift. Another chilly couple of nights look to be in-store for Wednesday and Thursday with clear skies overhead, however it looks like temperatures will remain above freezing.
LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/
As zonal flow dominates aloft and high pressure sits at the surface, expect a quiet and dry forecast through the period. Some deterministic models suggests another system will shift towards the region on Sunday with showers and iso. thunderstorms possible, however uncertainty remains high as the forecast will likely change in the next coming days. Temperatures will return to near normal on Thursday and are forecast to remain near normal into the weekend.
AVIATION /06Z MONDAY THROUGH FRIDAY/
10.06Z TAFS - VFR throughout the period. Northwest winds will be building in behind the cold front that pushed through the region earlier this evening, becoming sustained 10 to 15 mph, with gusts into the mid 20s during the overnight period and remaining fairly steady throughout the day. This afternoon, winds will rise further becoming sustained 15 to 20 mph with gusts to near 30 mph by the late afternoon hours, with weakening winds during the overnight period.
Extended Aviation Outlook: Prevailing VFR.
MARINE
Today and tonight: Breezy northwest winds will be developing overnight and continuing into the morning hours, gusting 25 to 30 knots, outside of the Charleston Harbor which will see gusts from the upper teens into the lower 20s. Will likely see a brief weakening of the winds during peak solar heating, but they will again strengthen as the sun lowers and additional cold-air advection pushes across the area. The previously issued Gale Watch has been upgraded to a Gale Warning for all near and offshore zones, as northwest winds will be sustained 25 to 35 knots with wind gusts of 35 to 40 knots expected. For the Charleston Harbor, a Small Craft Advisory remains in place starting this afternoon into the evening hours, for wind gusts 30 knots. Seas are forecast to build throughout the day, peaking tonight around 4 to 6 ft in the nearshore waters and 7 to 9 ft in the 20 to 60 nm offshore GA waters.
Tuesday through Friday: In the wake of a strong cold front, gusty northwesterly winds will continue across the marine zones as high pressure builds into the region. Expect wind speeds to diminish throughout the morning on Tuesday, and Gale Warnings to drop off for all marine zones by Tuesday afternoon. Afterwards, high pressure will dominate the local waters and allow for quite marine conditions into the weekend. Seas will taper back on Tuesday, and will range 1 to 3 ft through the majority of the week.
FIRE WEATHER
Some fire weather concerns exist for both today and Tuesday as RH values drop to around 30% today and 25% on Tuesday.
Additionally, NW wind gusts on Monday are forecast to be around 20 to 25 mph, with gusts to around 15 mph on Tuesday. The rainfall we saw earlier this evening will likely help alleviate additional concerns, with partners indicating fuels are not dry enough for an elevated fire danger at this time.
CLIMATE
Monday night's freeze will not be the earliest on record for all three climate sites. Below are the records for informational purposes.
KCHS: October 25, 1937 KCXM: November 3, 1954 KSAV: October 27, 1962
Upcoming Record Low Temperatures:
November 11 (Tuesday): KCHS: 29/1943 KCXM: 32/1913 KSAV: 31/1968
November 12 (Wednesday): KCHS: 27/1943 KCXM: 33/1894 KSAV: 30/2011
Upcoming Record Low Maximum Temperatures:
November 10 (Monday): KCHS: 46/1991 KCXM: 47/1991 KSAV: 49/1968
November 11 (Tuesday): KCHS: 54/1968 KCXM: 46/1913 KSAV: 49/1913
CHS WATCHES/WARNINGS/ADVISORIES
GA...Freeze Warning from 9 PM this evening to 9 AM EST Tuesday for GAZ087-088-099>101-114>119-137>141.
Cold Weather Advisory from midnight tonight to 8 AM EST Tuesday for GAZ087-088-099>101-114>116-137-138.
SC...Freeze Warning from 9 PM this evening to 9 AM EST Tuesday for SCZ040-042>045-047>052.
Cold Weather Advisory from midnight tonight to 8 AM EST Tuesday for SCZ040-042>044-047.
Lake Wind Advisory from 5 PM this afternoon to 4 AM EST Tuesday for SCZ045.
MARINE...Small Craft Advisory from 3 PM this afternoon to 4 AM EST Tuesday for AMZ330.
Small Craft Advisory until 5 PM EST this afternoon for AMZ350- 352-374.
Gale Warning from 5 PM this afternoon to 9 AM EST Tuesday for AMZ350.
Gale Warning from 5 PM this afternoon to 8 AM EST Tuesday for AMZ352.
Small Craft Advisory until 6 PM EST this evening for AMZ354.
Gale Warning from 6 PM this evening to 8 AM EST Tuesday for AMZ354.
Gale Warning from 5 PM this afternoon to noon EST Tuesday for AMZ374.
Area Forecast Discussion National Weather Service Charleston SC 107 AM EST Mon Nov 10 2025
SYNOPSIS
A strong cold front will move through tonight, bringing much colder conditions to the area this week. High pressure will build into the region through the remainder of the week.
NEAR TERM /UNTIL TUESDAY MORNING/
The cold front has pushed off into our near/offshore Atlantic waters, with cold-air advection (CAA) commencing on the backside as a surface high pressure builds down into the southeast. Expect breezy winds to develop throughout the rest of the overnight hours due to the CAA along with the increased surface pressure gradient.
This will result in northwest winds sustained 10 to 15 mph, with gusts into the mid 20s. While the cold temperatures will continue to pour into the region throughout the day, overnight lows this morning look to stay in the mid/upper 30s for inland areas and up into the lower/mid 40s along the coast. Ample sunshine this morning and afternoon will counteract the CAA, allowing for temperatures to rise into the lower to mid 50s across the area. However, winds will rise further becoming sustained 15 to 20 mph with gusts to near 30 mph by the late afternoon hours, resulting in a Lake Wind Advisory for Lake Moultrie from the afternoon hours into the early Tuesday morning.
Peak cold-air advection occurs during the evening hours, which will rapidly bring temperatures down into the lower to mid 30s prior to midnight, and further down into the mid 20s inland and lower 30s along the coast by daybreak. These low temperatures will challenge the record low temperatures at all three climate sites (see Climate section for more details,) with an area-wide Freeze Warning in affect. Winds will be strongest during the evening, weakening into the overnight period, but will still be breezy enough to result in minimum wind chills of 18 to 20 degrees F for inland southeast Georgia and portions of inland southeast South Carolina. Have thus issued a cold weather advisory given the criteria of 20 degrees F, so be sure to bundle up and wear appropriate clothing, a hat, and gloves when heading out Tuesday morning.
SHORT TERM /TUESDAY THROUGH THURSDAY/
Tuesday: Behind a departing cold front, strong CAA continues to dominate much of the forecast on Tuesday as temperatures struggle to reach into the low 50s. A Freeze Warning has been issued for the entire forecast area as confidence remains high in a widespread freeze occurring Monday night until Tuesday morning (~9AM).
Additionally, due to wind chill values in the upper teens to low 20s across counties west of I-95, a Cold Weather Advisory has been issued beginning at midnight on Tuesday until early Tuesday morning (~8AM). This will cause for temperatures to battle for record low maximum temperatures on Tuesday at all three climate sites - see Climate section for more details. Otherwise, breezy northwesterly winds will slowly diminish throughout the morning, and winds will range from 5 to 10 mph by the afternoon. Clear skies and relatively calm winds will allow for another chilly night with temperatures dropping into the upper 20s inland and upper 30s to low 40s along the coastline.
Wednesday and Thursday: A mid-level trough will push off the coastline on Wednesday and allow for zonal wind flow aloft to take over on Wednesday and Thursday. Heights should slowly rise as the center of a high pressure sits over the Southeast. In response, temperatures should warm back up into the mid to upper 60s on Wednesday and upper 60s to low 70s on Thursday. A rain-free forecast has been maintained as the atmosphere remains dry with PWATs near and below half an inch. Model guidance continues to indicate that a dry, cold front will push across the region on Thursday morning, but not much impact with this besides a subtle wind shift. Another chilly couple of nights look to be in-store for Wednesday and Thursday with clear skies overhead, however it looks like temperatures will remain above freezing.
LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/
As zonal flow dominates aloft and high pressure sits at the surface, expect a quiet and dry forecast through the period. Some deterministic models suggests another system will shift towards the region on Sunday with showers and iso. thunderstorms possible, however uncertainty remains high as the forecast will likely change in the next coming days. Temperatures will return to near normal on Thursday and are forecast to remain near normal into the weekend.
AVIATION /06Z MONDAY THROUGH FRIDAY/
10.06Z TAFS - VFR throughout the period. Northwest winds will be building in behind the cold front that pushed through the region earlier this evening, becoming sustained 10 to 15 mph, with gusts into the mid 20s during the overnight period and remaining fairly steady throughout the day. This afternoon, winds will rise further becoming sustained 15 to 20 mph with gusts to near 30 mph by the late afternoon hours, with weakening winds during the overnight period.
Extended Aviation Outlook: Prevailing VFR.
MARINE
Today and tonight: Breezy northwest winds will be developing overnight and continuing into the morning hours, gusting 25 to 30 knots, outside of the Charleston Harbor which will see gusts from the upper teens into the lower 20s. Will likely see a brief weakening of the winds during peak solar heating, but they will again strengthen as the sun lowers and additional cold-air advection pushes across the area. The previously issued Gale Watch has been upgraded to a Gale Warning for all near and offshore zones, as northwest winds will be sustained 25 to 35 knots with wind gusts of 35 to 40 knots expected. For the Charleston Harbor, a Small Craft Advisory remains in place starting this afternoon into the evening hours, for wind gusts 30 knots. Seas are forecast to build throughout the day, peaking tonight around 4 to 6 ft in the nearshore waters and 7 to 9 ft in the 20 to 60 nm offshore GA waters.
Tuesday through Friday: In the wake of a strong cold front, gusty northwesterly winds will continue across the marine zones as high pressure builds into the region. Expect wind speeds to diminish throughout the morning on Tuesday, and Gale Warnings to drop off for all marine zones by Tuesday afternoon. Afterwards, high pressure will dominate the local waters and allow for quite marine conditions into the weekend. Seas will taper back on Tuesday, and will range 1 to 3 ft through the majority of the week.
FIRE WEATHER
Some fire weather concerns exist for both today and Tuesday as RH values drop to around 30% today and 25% on Tuesday.
Additionally, NW wind gusts on Monday are forecast to be around 20 to 25 mph, with gusts to around 15 mph on Tuesday. The rainfall we saw earlier this evening will likely help alleviate additional concerns, with partners indicating fuels are not dry enough for an elevated fire danger at this time.
CLIMATE
Monday night's freeze will not be the earliest on record for all three climate sites. Below are the records for informational purposes.
KCHS: October 25, 1937 KCXM: November 3, 1954 KSAV: October 27, 1962
Upcoming Record Low Temperatures:
November 11 (Tuesday): KCHS: 29/1943 KCXM: 32/1913 KSAV: 31/1968
November 12 (Wednesday): KCHS: 27/1943 KCXM: 33/1894 KSAV: 30/2011
Upcoming Record Low Maximum Temperatures:
November 10 (Monday): KCHS: 46/1991 KCXM: 47/1991 KSAV: 49/1968
November 11 (Tuesday): KCHS: 54/1968 KCXM: 46/1913 KSAV: 49/1913
CHS WATCHES/WARNINGS/ADVISORIES
GA...Freeze Warning from 9 PM this evening to 9 AM EST Tuesday for GAZ087-088-099>101-114>119-137>141.
Cold Weather Advisory from midnight tonight to 8 AM EST Tuesday for GAZ087-088-099>101-114>116-137-138.
SC...Freeze Warning from 9 PM this evening to 9 AM EST Tuesday for SCZ040-042>045-047>052.
Cold Weather Advisory from midnight tonight to 8 AM EST Tuesday for SCZ040-042>044-047.
Lake Wind Advisory from 5 PM this afternoon to 4 AM EST Tuesday for SCZ045.
MARINE...Small Craft Advisory from 3 PM this afternoon to 4 AM EST Tuesday for AMZ330.
Small Craft Advisory until 5 PM EST this afternoon for AMZ350- 352-374.
Gale Warning from 5 PM this afternoon to 9 AM EST Tuesday for AMZ350.
Gale Warning from 5 PM this afternoon to 8 AM EST Tuesday for AMZ352.
Small Craft Advisory until 6 PM EST this evening for AMZ354.
Gale Warning from 6 PM this evening to 8 AM EST Tuesday for AMZ354.
Gale Warning from 5 PM this afternoon to noon EST Tuesday for AMZ374.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| CHTS1 | 1 mi | 46 min | NW 11G | 54°F | 65°F | 29.88 | ||
| 41029 - Capers Nearshore (CAP 2) | 15 mi | 56 min | WNW 12G | 59°F | 66°F | 29.85 | 46°F | |
| 41065 | 16 mi | 64 min | 66°F | 2 ft | ||||
| 41066 | 21 mi | 56 min | WNW 18G | 60°F | 68°F | 29.83 | 48°F | |
| 41076 | 21 mi | 84 min | 3 ft | |||||
| ACXS1 - ACE Basin Reserve, SC | 32 mi | 79 min | W 2.9 | 53°F | 29.89 | 41°F | ||
| 41033 | 43 mi | 56 min | WNW 14G | 56°F | 66°F | 29.89 | 46°F | |
| 41067 | 43 mi | 39 min | 65°F | 3 ft | ||||
| 41004 - EDISTO - 41 NM Southeast of Charleston, SC | 47 mi | 34 min | WNW 23G | 64°F | 75°F | 29.84 | 49°F |
Wind History for Charleston, SC
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KJZI
Terminal Aerodrome Forecast (TAF) for KJZI
Wind History Graph: JZI
(wind in knots)
GEOS Local Image of southeast
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Charleston, SC,
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