Marine Weather and Tide Forecast for Isle of Palms, SC
 | Sunrise 7:22 AM Sunset 6:47 PM Moonrise 10:06 AM Moonset 8:04 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
ANZ835 Cape Fear To 31n To 1000 Fm- 1055 Am Edt Wed Oct 14 2026
.gale force winds possible Sat - .
Today - N to ne winds less than 5 kt, becoming variable. Seas 3 to 4 ft.
Tonight - Variable winds less than 10 kt, becoming S to sw. Seas 3 to 4 ft.
Thu - Variable winds less than 10 kt. Seas 3 to 4 ft.
Thu night - E to se winds less than 10 kt, becoming S to sw. Seas 3 to 4 ft.
Fri - S to sw winds 5 to 15 kt, becoming sw 10 to 20 kt. Seas 3 to 4 ft.
Fri night - SW winds 15 to 25 kt, becoming W to nw 20 to 30 kt. Seas 5 to 8 ft.
Sat - NW winds 20 to 30 kt, becoming N 25 to 35 kt. Seas 7 to 11 ft.
Sat night - N winds 25 to 35 kt, becoming ne. Seas 10 to 17 ft.
Sun - NE winds 25 to 35 kt. Seas 10 to 17 ft.
Sun night - NE winds 25 to 35 kt, becoming 25 to 30 kt. Seas 7 to 13 ft.
ANZ800 Gulf Of Maine To The Hague Line- 1051 Am Edt Wed Oct 14 2026
.gale force winds possible Sat - .
Today - W to sw winds 10 to 20 kt. Seas 4 to 8 ft. Slight chance of showers and tstms.
Tonight - NW winds 10 to 20 kt, increasing to 20 to 30 kt. Seas 4 to 7 ft.
Thu - N winds 20 to 30 kt. Seas 5 to 9 ft.
Thu night - N winds 5 to 15 kt, becoming variable 5 to 10 kt. Seas 3 to 6 ft.
Fri - S winds 15 to 25 kt. Seas 3 to 4 ft, building to 4 to 8 ft.
Fri night - SW winds 20 to 25 kt, becoming W to nw 20 to 30 kt. Seas 6 to 11 ft.
Sat - NW winds 30 to 35 kt. Seas 10 to 14 ft.
Sat night - NW winds 25 to 35 kt, diminishing to 20 to 25 kt. Seas 8 to 14 ft.
Sun - NW winds 15 to 25 kt. Seas 5 to 8 ft.
Sun night - NW winds 10 to 15 kt, becoming sw. Seas 3 to 5 ft.
7 Day Forecast for Marine Location Near Isle of Palms, SC
NEW! Add second zone forecast
FXUS62 KCHS 141824 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 224 PM EDT Wed Oct 14 2026
WHAT HAS CHANGED
All sections have been updated.
KEY MESSAGES
- 1) Above normal temperatures and dry conditions will prevail through Friday.
- 2) Expect gusty winds and temperatures well below normal this weekend behind a strong cold front.
DISCUSSION
KEY MESSAGE 1: Above normal temperatures and dry conditions will prevail through Friday.
Warm and dry conditions continue through Friday as a ridge of high pressure slides from west to east across the southeast Region. At the surface, dry high pressure will be weakening before moving into the nearshore Atlantic waters on Thursday into Friday. With h925 temperatures peaking in the 20-22 deg C range both today and Thursday, which is in the mid to upper 90th percentile for the dates, near-record to record high temperatures will be possible on both days. Areas away from the coast will peak in the mid to upper 80s, with lower to mid 80s along the coast, with the individual records at our climate sites in the climate section at the bottom.
Similar to what we saw earlier this morning, patchy shallow ground fog will be possible Thursday morning. Maximum dew points today should surge into the lower to upper 60s, and with overnight lows similarly in the lower to upper 60s, cross over temperatures are expected to be reached. However, with high condensation pressure deficits, the fog should be patchy and shallow. Areas in the vicinity of Darien, GA have the highest probabilities for visibilities below 1 mile near 25%.
KEY MESSAGE 2: Expect gusty winds and temperatures well below normal this weekend behind a strong cold front.
A strong cold front will sweep across southeast Georgia and the SC Lowcountry late Friday night into Saturday morning. NAM12 shows a frontal wave move north along the coast Saturday morning, resulting in a band of light of rainfall across the forecast area, GFS and ECMWF along with the AI variants generally agrees that it should be a dry cold front, only sprinkles across northern Dorchester and Berkeley Counties areas early Saturday morning. GFS H85 temperatures over Lake Moultrie cools by 10 degrees between 0Z Sat to 0Z Sun. As a result, temperature will fall well below normal on Sat, with highs ranging around 70 degrees. In addition, north-northeast winds across the region will be breezy, with gusts around 25 mph. In fact, north winds across Lake Moultrie may strengthen early Saturday, gusting around 25 kts. A Lake Wind Advisory may be needed beginning early Saturday morning.
Saturday night into Sunday, the center of a 1035 mb high will settle over VA by daybreak Sunday. The sfc high will ridge SW across the Carolinas and Georgia on Sunday. Northeast winds will continue through the period, generally between 10-15 mph with gusts between 20 to 25 mph. The northeast winds will maintain cool llvl thicknesses across the forecast area. Using a blend of guidance, low temperatures on Sunday are forecast to range from the upper 40s inland to the mid to upper 50s along the coast. High temperatures are forecast to range from the mid to upper 60s across SE GA and the SC Lowcountry.
The center of sfc high pressure should shift over off the New England coast on Monday, resulting in winds to weaken and shift from the east-northeast. Temperatures across the CWA should warm near seasonable normals, mid to upper 70s. Gradual warming expected through mid-week.
AVIATION /18Z WEDNESDAY THROUGH MONDAY/
Clear skies with light and variable winds will continue into the overnight period. Chances for patchy and shallow ground fog return late overnight, with areas in the vicinity of Darien, GA having a 25% chance for visibilities to get below 1 mile. Elsewhere, the fog is expected to be transient and thin. Any fog will dissipate shortly after sunrise, with no aviation concerns for the rest of the day.
Extended Aviation Outlook: VFR.
MARINE
Tonight through Thursday: High pressure will continue the benign marine conditions. Winds will become southerly this afternoon and southwesterly overnight, remaining below 10 knots or less.
Friday through Monday: A strong cold front will sweep across the region late Friday night into Saturday morning. After the front late Friday night, winds will veer from the north and strengthen to 25 to 30 kts across the Charleston Harbor with gale wind gusts across the nearshore and outer SC/GA waters. Gale Watches are likely for all marine zones outside the Charleston Harbor beginning Friday night. A Small Craft Advisory is likely for the Charleston Harbor, beginning late Friday night. Guidance has trended much stronger for marine wind gusts Sunday into Sunday evening, with the NBM indicating peak probabilities, 40 percent, of storm force (48 kts) wind gusts across the outer GA waters and portions of the outer SC waters. If guidance remains strong, it is possible that Storm Watches/Warnings could be required for portions of the outer GA/SC waters Saturday night into Sunday night. At this time, the coastal waters forecast will feature gusts around 45 kts across the outer GA waters Saturday evening and again Sunday evening. Surging gale wind gusts appears to linger through Monday night
With gale to potential storm-force wind gusts, wave heights are expected to build to 7 to 10 ft Saturday-Saturday night, gradually building to 10 to 16 ft by Sunday-Sunday night. The elevated seas may result in breakers in excess of 5 ft, with High Surf conditions this weekend, especially along the GA coast. Wave heights should gradually subside through early next week. However, six ft or greater seas may remain across the nearshore and outer waters through Tuesday.
CLIMATE
Record High Temperatures:
October 14: KCHS: 88/2024 KCXM: 86/2024 KSAV: 88/2024
October 15: KCHS: 87/2021 KCXM: 88/1925 KSAV: 90/1925
EQUIPMENT
The National Weather Service Charleston Doppler Radar (KCLX) is expected to be down for around two hours Thursday morning for maintenance.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...None.
Area Forecast Discussion National Weather Service Charleston SC 224 PM EDT Wed Oct 14 2026
WHAT HAS CHANGED
All sections have been updated.
KEY MESSAGES
- 1) Above normal temperatures and dry conditions will prevail through Friday.
- 2) Expect gusty winds and temperatures well below normal this weekend behind a strong cold front.
DISCUSSION
KEY MESSAGE 1: Above normal temperatures and dry conditions will prevail through Friday.
Warm and dry conditions continue through Friday as a ridge of high pressure slides from west to east across the southeast Region. At the surface, dry high pressure will be weakening before moving into the nearshore Atlantic waters on Thursday into Friday. With h925 temperatures peaking in the 20-22 deg C range both today and Thursday, which is in the mid to upper 90th percentile for the dates, near-record to record high temperatures will be possible on both days. Areas away from the coast will peak in the mid to upper 80s, with lower to mid 80s along the coast, with the individual records at our climate sites in the climate section at the bottom.
Similar to what we saw earlier this morning, patchy shallow ground fog will be possible Thursday morning. Maximum dew points today should surge into the lower to upper 60s, and with overnight lows similarly in the lower to upper 60s, cross over temperatures are expected to be reached. However, with high condensation pressure deficits, the fog should be patchy and shallow. Areas in the vicinity of Darien, GA have the highest probabilities for visibilities below 1 mile near 25%.
KEY MESSAGE 2: Expect gusty winds and temperatures well below normal this weekend behind a strong cold front.
A strong cold front will sweep across southeast Georgia and the SC Lowcountry late Friday night into Saturday morning. NAM12 shows a frontal wave move north along the coast Saturday morning, resulting in a band of light of rainfall across the forecast area, GFS and ECMWF along with the AI variants generally agrees that it should be a dry cold front, only sprinkles across northern Dorchester and Berkeley Counties areas early Saturday morning. GFS H85 temperatures over Lake Moultrie cools by 10 degrees between 0Z Sat to 0Z Sun. As a result, temperature will fall well below normal on Sat, with highs ranging around 70 degrees. In addition, north-northeast winds across the region will be breezy, with gusts around 25 mph. In fact, north winds across Lake Moultrie may strengthen early Saturday, gusting around 25 kts. A Lake Wind Advisory may be needed beginning early Saturday morning.
Saturday night into Sunday, the center of a 1035 mb high will settle over VA by daybreak Sunday. The sfc high will ridge SW across the Carolinas and Georgia on Sunday. Northeast winds will continue through the period, generally between 10-15 mph with gusts between 20 to 25 mph. The northeast winds will maintain cool llvl thicknesses across the forecast area. Using a blend of guidance, low temperatures on Sunday are forecast to range from the upper 40s inland to the mid to upper 50s along the coast. High temperatures are forecast to range from the mid to upper 60s across SE GA and the SC Lowcountry.
The center of sfc high pressure should shift over off the New England coast on Monday, resulting in winds to weaken and shift from the east-northeast. Temperatures across the CWA should warm near seasonable normals, mid to upper 70s. Gradual warming expected through mid-week.
AVIATION /18Z WEDNESDAY THROUGH MONDAY/
Clear skies with light and variable winds will continue into the overnight period. Chances for patchy and shallow ground fog return late overnight, with areas in the vicinity of Darien, GA having a 25% chance for visibilities to get below 1 mile. Elsewhere, the fog is expected to be transient and thin. Any fog will dissipate shortly after sunrise, with no aviation concerns for the rest of the day.
Extended Aviation Outlook: VFR.
MARINE
Tonight through Thursday: High pressure will continue the benign marine conditions. Winds will become southerly this afternoon and southwesterly overnight, remaining below 10 knots or less.
Friday through Monday: A strong cold front will sweep across the region late Friday night into Saturday morning. After the front late Friday night, winds will veer from the north and strengthen to 25 to 30 kts across the Charleston Harbor with gale wind gusts across the nearshore and outer SC/GA waters. Gale Watches are likely for all marine zones outside the Charleston Harbor beginning Friday night. A Small Craft Advisory is likely for the Charleston Harbor, beginning late Friday night. Guidance has trended much stronger for marine wind gusts Sunday into Sunday evening, with the NBM indicating peak probabilities, 40 percent, of storm force (48 kts) wind gusts across the outer GA waters and portions of the outer SC waters. If guidance remains strong, it is possible that Storm Watches/Warnings could be required for portions of the outer GA/SC waters Saturday night into Sunday night. At this time, the coastal waters forecast will feature gusts around 45 kts across the outer GA waters Saturday evening and again Sunday evening. Surging gale wind gusts appears to linger through Monday night
With gale to potential storm-force wind gusts, wave heights are expected to build to 7 to 10 ft Saturday-Saturday night, gradually building to 10 to 16 ft by Sunday-Sunday night. The elevated seas may result in breakers in excess of 5 ft, with High Surf conditions this weekend, especially along the GA coast. Wave heights should gradually subside through early next week. However, six ft or greater seas may remain across the nearshore and outer waters through Tuesday.
CLIMATE
Record High Temperatures:
October 14: KCHS: 88/2024 KCXM: 86/2024 KSAV: 88/2024
October 15: KCHS: 87/2021 KCXM: 88/1925 KSAV: 90/1925
EQUIPMENT
The National Weather Service Charleston Doppler Radar (KCLX) is expected to be down for around two hours Thursday morning for maintenance.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...None.
Link to 5 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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