Marine Weather and Tide Forecast for Kiawah Island, SC
![]() | Sunrise 6:10 AM Sunset 8:31 PM Moonrise 12:00 AM Moonset 11:11 AM |
AMZ330 Charleston Harbor- 241 Am Edt Tue Jun 17 2025
Today - SW winds 10 to 15 kt, becoming S with gusts to 20 kt late.
Tonight - SW winds 10 to 15 kt.
Wed - SW winds 10 to 15 kt.
Wed night - SW winds 10 to 15 kt.
Thu - SW winds 10 to 15 kt. A chance of showers and tstms in the afternoon.
Thu night - SW winds 10 to 15 kt. A chance of showers and tstms.
Fri - SW winds 5 to 10 kt. A chance of showers and tstms.
Fri night - SW winds 5 to 10 kt. A chance of showers and tstms.
Sat - SW winds 5 to 10 kt. A chance of showers and tstms.
Sat night - S winds 5 to 10 kt.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 81 degrees.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 81 degrees.
AMZ300 241 Am Edt Tue Jun 17 2025
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - Atlantic high pressure will continue to build across the southeast through the week. A cold front could approach the region late week, though most indications are for the front to stall to our northwest.
7 Day Forecast for Marine Location Near Kiawah Island, SC

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Kiawah River Bridge Click for Map Tue -- 12:38 AM EDT Moonrise Tue -- 12:53 AM EDT 5.86 feet High Tide Tue -- 06:12 AM EDT Sunrise Tue -- 07:14 AM EDT 0.24 feet Low Tide Tue -- 12:11 PM EDT Moonset Tue -- 01:25 PM EDT 5.30 feet High Tide Tue -- 07:25 PM EDT 0.61 feet Low Tide Tue -- 08:30 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |   |
Kiawah River Bridge, South Carolina, Tide feet
12 am |
5.7 |
1 am |
5.9 |
2 am |
5.5 |
3 am |
4.5 |
4 am |
3.2 |
5 am |
1.8 |
6 am |
0.8 |
7 am |
0.3 |
8 am |
0.4 |
9 am |
1.3 |
10 am |
2.6 |
11 am |
3.9 |
12 pm |
4.8 |
1 pm |
5.3 |
2 pm |
5.2 |
3 pm |
4.6 |
4 pm |
3.5 |
5 pm |
2.2 |
6 pm |
1.2 |
7 pm |
0.7 |
8 pm |
0.7 |
9 pm |
1.4 |
10 pm |
2.6 |
11 pm |
3.9 |
Charleston Harbor Entrance Click for Map Tue -- 12:37 AM EDT Moonrise Tue -- 01:15 AM EDT -0.00 knots Slack Tue -- 04:39 AM EDT -2.26 knots Max Ebb Tue -- 06:11 AM EDT Sunrise Tue -- 07:49 AM EDT 0.00 knots Slack Tue -- 10:19 AM EDT 1.49 knots Max Flood Tue -- 12:10 PM EDT Moonset Tue -- 01:40 PM EDT -0.00 knots Slack Tue -- 04:55 PM EDT -1.91 knots Max Ebb Tue -- 07:58 PM EDT 0.00 knots Slack Tue -- 08:29 PM EDT Sunset Tue -- 10:40 PM EDT 1.50 knots Max Flood Tide / Current data from XTide NOT FOR NAVIGATION |   |
Charleston Harbor Entrance, South Carolina Current, knots
12 am |
0.7 |
1 am |
0.2 |
2 am |
-0.7 |
3 am |
-1.6 |
4 am |
-2.1 |
5 am |
-2.2 |
6 am |
-1.7 |
7 am |
-0.8 |
8 am |
0.2 |
9 am |
1 |
10 am |
1.5 |
11 am |
1.4 |
12 pm |
0.9 |
1 pm |
0.4 |
2 pm |
-0.3 |
3 pm |
-1.1 |
4 pm |
-1.7 |
5 pm |
-1.9 |
6 pm |
-1.6 |
7 pm |
-0.8 |
8 pm |
0 |
9 pm |
0.8 |
10 pm |
1.4 |
11 pm |
1.5 |
Area Discussion for Charleston, SC
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FXUS62 KCHS 170526 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 126 AM EDT Tue Jun 17 2025
SYNOPSIS
Atlantic high pressure will continue to build across the Southeast through the week. A cold front could approach the region late week.
NEAR TERM /UNTIL 6 AM THIS MORNING/
Isolated showers have shifted over the GA Atlantic waters late tonight. The hourly PoPs and wx will be adjusted to keep any convection over the waters through the next several hours.
Otherwise, conditions across the forecast area will feature mostly clear sky and steady southwest winds/
In general, low temps will range in the low-mid 70s inland to upper 70s/around 80 along the beaches.
SHORT TERM /6 AM THIS MORNING THROUGH THURSDAY/
Mid level ridge will extend across the Southeast through much of the period, with a trough approaching late. At the surface, the forecast area will remain on the western periphery of high pressure. Large scale forcing for ascent is lacking so convection will largely be driven by daytime heating and mesoscale boundaries such as the sea breeze. Coverage will remain fairly limited with PoPs generally 20- 30% for Tuesday and Wednesday, and 30-40% for Thursday. High temperatures will peak in the low to mid 90s away from the coast, with humidity making it feel even hotter. Heat indices stay below Heat Advisory criteria.
LONG TERM /THURSDAY NIGHT THROUGH MONDAY/
Mid level ridge weakens Thursday night into Friday as a shortwave passes across the mid-Atlantic states. A weak front will approach the region, but it will likely stall in the vicinity and eventually wash out. Ridging is expected to build over the eastern US over the weekend and early next week. Isolated to scattered diurnally-driven showers and thunderstorms will be possible each day. High temperatures in the low to mid 90s away from the immediate coast will combine with elevated humidity to yield heat indices mainly in the 100-105 range most afternoons. As it stands now, conditions remain shy of Heat Advisory criteria, but it will be something to watch.
AVIATION /06Z TUESDAY THROUGH SATURDAY/
6Z TAFs: VFR conditions with southwest winds through the TAF period. Winds could become gusty during the afternoon hours, especially at KJZI. It is possible that isolated showers or thunderstorms may develop along the sea breeze near KSAV late this afternoon, coverage too limited to highlight in the TAF at this time.
Extended Aviation Forecast: Brief flight restrictions are possible in showers and thunderstorms each day, mainly in the afternoon.
MARINE
Tonight: Expect wind/sea conditions to remain below Small Craft Advisory levels through the night with the Atlantic ridge in place. South/southwest winds in the 10-15 kt range could occasionally gust up to 20 kt. Seas will range between 2-4 ft, slowly subsiding after midnight.
Tuesday through Saturday: Marine conditions are expected to stay below Small Craft Advisory criteria through the period. Southerly flow will persist with speeds generally 15 knots or less, except a bit higher along the land/sea interface and Charleston Harbor each afternoon with the sea breeze. Seas will average 2-3 feet, with some occasional 4 footers in the outer portions of the waters.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...None.
Area Forecast Discussion National Weather Service Charleston SC 126 AM EDT Tue Jun 17 2025
SYNOPSIS
Atlantic high pressure will continue to build across the Southeast through the week. A cold front could approach the region late week.
NEAR TERM /UNTIL 6 AM THIS MORNING/
Isolated showers have shifted over the GA Atlantic waters late tonight. The hourly PoPs and wx will be adjusted to keep any convection over the waters through the next several hours.
Otherwise, conditions across the forecast area will feature mostly clear sky and steady southwest winds/
In general, low temps will range in the low-mid 70s inland to upper 70s/around 80 along the beaches.
SHORT TERM /6 AM THIS MORNING THROUGH THURSDAY/
Mid level ridge will extend across the Southeast through much of the period, with a trough approaching late. At the surface, the forecast area will remain on the western periphery of high pressure. Large scale forcing for ascent is lacking so convection will largely be driven by daytime heating and mesoscale boundaries such as the sea breeze. Coverage will remain fairly limited with PoPs generally 20- 30% for Tuesday and Wednesday, and 30-40% for Thursday. High temperatures will peak in the low to mid 90s away from the coast, with humidity making it feel even hotter. Heat indices stay below Heat Advisory criteria.
LONG TERM /THURSDAY NIGHT THROUGH MONDAY/
Mid level ridge weakens Thursday night into Friday as a shortwave passes across the mid-Atlantic states. A weak front will approach the region, but it will likely stall in the vicinity and eventually wash out. Ridging is expected to build over the eastern US over the weekend and early next week. Isolated to scattered diurnally-driven showers and thunderstorms will be possible each day. High temperatures in the low to mid 90s away from the immediate coast will combine with elevated humidity to yield heat indices mainly in the 100-105 range most afternoons. As it stands now, conditions remain shy of Heat Advisory criteria, but it will be something to watch.
AVIATION /06Z TUESDAY THROUGH SATURDAY/
6Z TAFs: VFR conditions with southwest winds through the TAF period. Winds could become gusty during the afternoon hours, especially at KJZI. It is possible that isolated showers or thunderstorms may develop along the sea breeze near KSAV late this afternoon, coverage too limited to highlight in the TAF at this time.
Extended Aviation Forecast: Brief flight restrictions are possible in showers and thunderstorms each day, mainly in the afternoon.
MARINE
Tonight: Expect wind/sea conditions to remain below Small Craft Advisory levels through the night with the Atlantic ridge in place. South/southwest winds in the 10-15 kt range could occasionally gust up to 20 kt. Seas will range between 2-4 ft, slowly subsiding after midnight.
Tuesday through Saturday: Marine conditions are expected to stay below Small Craft Advisory criteria through the period. Southerly flow will persist with speeds generally 15 knots or less, except a bit higher along the land/sea interface and Charleston Harbor each afternoon with the sea breeze. Seas will average 2-3 feet, with some occasional 4 footers in the outer portions of the waters.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...None.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
CHTS1 | 16 mi | 51 min | SW 7G | 80°F | 80°F | 30.04 | ||
ACXS1 - ACE Basin Reserve, SC | 18 mi | 96 min | WSW 1 | 80°F | 30.04 | 77°F | ||
41066 | 24 mi | 73 min | SSW 19G | 81°F | 30.03 | 78°F | ||
41033 | 27 mi | 73 min | SW 14G | 83°F | 30.04 | |||
41067 | 27 mi | 51 min | 82°F | 3 ft | ||||
41029 - Capers Nearshore (CAP 2) | 30 mi | 73 min | SW 14G | 80°F | 78°F | 30.03 | 76°F | |
41065 | 30 mi | 74 min | 3 ft | |||||
41004 - EDISTO - 41 NM Southeast of Charleston, SC | 54 mi | 41 min | SSW 19G | 82°F | 83°F | 30.05 | 76°F |
Wind History for Charleston, SC
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Airport Reports
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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