Charleston, SC Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Charleston, SC

June 18, 2024 9:20 AM EDT (13:20 UTC) Change Location
Sunrise 6:10 AM   Sunset 8:31 PM
Moonrise 4:32 PM   Moonset 2:20 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
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AMZ330 Charleston Harbor- 648 Am Edt Tue Jun 18 2024

Today - E winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Waves 1 to 2 ft this afternoon.

Tonight - E winds 15 kt.

Wed - E winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon.

Wed night - E winds 10 to 15 kt. A slight chance of showers and tstms.

Thu - E winds 10 to 15 kt with gusts to 20 kt. A slight chance of showers and tstms in the afternoon.

Thu night - E winds 15 kt with gusts to 20 kt, becoming ne after midnight. A slight chance of showers and tstms.

Fri - NE winds 10 to 15 kt. A chance of showers and tstms.

Fri night - E winds 5 to 10 kt. A slight chance of showers and tstms.

Sat - E winds 5 to 10 kt. A chance of showers and tstms.

Sat night - S winds 5 to 10 kt. A slight chance of showers and tstms.
winds and waves higher in and near tstms.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 83 degrees.

AMZ300 648 Am Edt Tue Jun 18 2024

Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - High pressure will extend across the region early this week. A trough of low pressure could approach the southeast u.s coast by late week.


7 Day Forecast for Marine Location Near Charleston, SC
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Area Discussion for - Charleston, SC
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FXUS62 KCHS 181110 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 710 AM EDT Tue Jun 18 2024

SYNOPSIS
High pressure will extend across the region early this week. A trough of low pressure could approach the Southeast U.S coast by late week.

NEAR TERM /THROUGH TONIGHT/
The lowest temperatures this morning were as follows: Walterboro (KRBW)...63F Ravenel.............63F Near Huger..........63F

For today: A high amplitude mid and upper ridge will cover much of the eastern states into the northeast Gulf of Mexico, with the center near the Mason-Dixon Line with 500 mb heights that are near 5950-5960 meters. This occurs in tandem with a strong and humongous sized surface ridge that covers the western Atlantic and eastern third of the country. there are also hints that a very subtle inverted trough could form offshore.

The large scale subsidence associated with the ridge aloft, a pronounced cap around 850 mb, and poor thermodynamics suggest that convection will be hard to come by. However, a deep easterly flow, convergence from the sea breeze, some low level Theta-E ridging, and maybe very weak isentropic ascent will produce isolated to scattered showers. The best chances will be over the Georgia coastal counties where the low level convergence is the best, and PWat is higher than further north.
We did maintain a mention of slight chance thunder since it is mid June, and the NBM does show isolated coverage this afternoon.
But given weak buoyancy and the HRRR indicative of less than 10% chance of t-storms, we would not be surprised if none actually occur.

There exists a tight gradient around the surf ace high through the day, and given deep mixing and a boost from the sea breeze, easterly winds will reach 10-20 mph, and even a little higher along and near the coast. Gusts will reach as much as 25 or maybe 30 mph, especially over the coastal counties.

Temperatures will be close to climo, but dew points will be mainly in the 60s, which equates to afternoon RH's mainly below 50%. Certainly these are not summerlike values.

Tonight: Little to no change in the pattern both at the surface and aloft, with even some increase in the strength of both ridges. A continued deep easterly flow and sufficient moisture will result in at least isolated showers coming in off the ocean, especially impacting coastal Georgia. Although winds diminish inland, they do continue rather gusty near and at the coast. This will result in a fairly large range of temperatures; lows 64-68F degrees well inland (where the lowest dew points are found, and middle 70s on the barrier islands, and over the Charleston and Savannah metro regions.

SHORT TERM /WEDNESDAY THROUGH FRIDAY/
he local forecast area will remain within the southern periphery of upper level high pressure centered over New England on Wednesday.
A similar pattern will be present at the surface. The high pressure at the surface will shift further eastward towards Bermuda on Thursday and Friday. The high pressure aloft is forecast to remain over the East Coast through the period. Unseasonably quiet weather is forecast Wednesday and Thursday as subsidence persists aloft, with only slight chance to chance PoPs featured in the forecast.
Additionally, thunder chances are rather low as instability is negligible across the forecast area. Thunder chances have been capped at slight chance for Wednesday and Thursday.

Friday the pattern turns more active as the subsidence begins to break down as well as an influx of moisture arrives, originating from a low pressure disturbance off the east coast of Florida. The development of the low pressure into anything other than a broad area of low pressure/open trough is still very low confidence. Most ensemble guidance continues to suggest little formation. Showers and thunderstorms are forecast to come ashore Friday afternoon, increasing in coverage in the afternoon hours. The greatest chances remain across southeast GA where the greatest moisture profile is.

Temperatures through the period are forecast to be right around normal, with highs in the upper 80s to around 90 and overnight lows in the upper 60s to low 70s.

LONG TERM /FRIDAY NIGHT THROUGH MONDAY/
A broad upper level trough will begin to trek across the southeast U.S. on Sunday as high pressure aloft shifts further south. At the surface a cold front will approach the region late this weekend.
Between forcing from the approaching cold front and the local afternoon sea breeze, precipitation chances are forecast to increase through the weekend heading into next week. Temperatures will warm through the period, with low to mid 90s on Saturday warming to upper 90s on Monday.

AVIATION /11Z TUESDAY THROUGH SATURDAY/
Prevailing VFR conditions are expected at CHS/JZI/SAV terminals through 12Z Wednesday. However, brief MVFR ceilings are possible this morning with onshore flow off the Atlantic, particularly at the SAV terminal.

There is enough risk of showers at KSAV this afternoon that we included VCSH after 16Z.

Otherwise, gusty easterly winds will peak at least near 20 or 25 kt at the terminals from about 16Z through sunset.

Extended Aviation Outlook: Prevailing VFR. Brief flight restrictions are possible in afternoon showers/thunderstorms Wednesday, especially at KSAV. Chances of flight restrictions increase at CHS/JZI/SAV terminals later in the week with showers and thunderstorms moving onshore.

MARINE
Today and tonight: A large and strong ridge of high pressure will encompass the coastal waters, with maybe a subtle inverted trough to form nearby. There will be as much as a 2-3 millibar pressure gradient in place locally, resulting in rather elevated easterly winds of at least 15 or 20 kt and gusty. The favorable long duration onshore fetch will allow for seas to reach 4-5 feet within 20 nm today, and 5-6 feet on the outer Georgia waters. It is there where we have a Small Craft Advisory beginning early this evening. Seas will build another foot or so tonight all waters, and we might need to expand the coverage of the Small Craft Advisories.

Wednesday through Saturday: Generally, high pressure will prevail across the local marine waters. Northeasterly winds 15 to 20 knots will persist across the local waters Wednesday into Friday morning.
Gusts may approach 25 knots at times. Winds Friday will remain out of the NE, however easing slightly to 10 to 15 knots. Conditions will continue to improve into Saturday, with winds shifting to the SE around 10 knots by Saturday night. Seas are forecast to build across the local marine zones, peaking Thursday with 5 to 6 ft across the nearshore waters and 7 to 8 ft across the 20-60 nm offshore GA waters. Small Craft Advisories will be needed for all waters outside the Charleston Harbor through Thursday night. Seas will decrease Friday, with 3 to 4 ft forecast Saturday morning.

Rip Currents: Although there still isn't much swell that will impact the beaches today, given the modest onshore winds and numerous rip currents at Tybee yesterday, and enhanced risk of rip currents will occur. In combination with the Rip Current MOS and a locally developed Rip Current Calculator, we are showing a Moderate Risk of Rip Currents for the South Carolina beaches, and High Risk for the Georgia beaches today.

A High Risk for rip currents has been hoisted for Wednesday across all area beaches. An enhanced risk of rip currents will likely persist through the end of the week as long period swell impacts the region.

High Surf: Breaking wave heights could reach 5 ft or greater Wednesday night into Thursday, especially along the Charleston County coast. A High Surf Advisory may be required.

TIDES/COASTAL FLOODING
With the approaching full moon (6/22) tides in the Charleston Harbor could reach minor flood stage with the evening high tides both Wednesday and Thursday. Coastal Flood Advisories could be required for Charleston and Coastal Colleton Counties.

Tides at Fort Pulaski are forecast to remain below minor flood stage.

CHS WATCHES/WARNINGS/ADVISORIES
GA...High Risk for Rip Currents through this evening for GAZ117-119-139- 141.
SC...None.
MARINE...Small Craft Advisory from 6 PM this evening to 6 AM EDT Saturday for AMZ374.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
CHTS1 0 mi50 minE 13G16 79°F 83°F30.18
41029 - Capers Nearshore (CAP 2) 16 mi72 minESE 14G19 79°F 82°F30.1567°F
41065 17 mi58 min 3 ft
41066 22 mi72 minESE 12G18 79°F 80°F30.1568°F
41076 22 mi72 min 4 ft
ACXS1 - ACE Basin Reserve, SC 32 mi95 minN 1 74°F 30.1269°F
41033 43 mi72 minE 16G19 80°F 82°F30.1170°F
41067 43 mi65 min 82°F4 ft
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi40 minE 14G18 79°F 81°F30.1672°F


Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KJZI CHARLESTON EXECUTIVE,SC 7 sm25 minE 1110 smClear81°F64°F58%30.18
KCHS CHARLESTON AFB/INTL,SC 10 sm24 minNE 0710 smPartly Cloudy81°F66°F62%30.18
KLRO MT PLEASANT RGNLFAISON FIELD,SC 11 sm25 minvar 067 smA Few Clouds79°F70°F74%30.18
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Wind History graph: JZI
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Tide / Current for Charleston, South Carolina
   
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Charleston
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Tue -- 03:20 AM EDT     Moonset
Tue -- 05:39 AM EDT     4.37 feet High Tide
Tue -- 06:11 AM EDT     Sunrise
Tue -- 11:54 AM EDT     0.45 feet Low Tide
Tue -- 05:32 PM EDT     Moonrise
Tue -- 06:25 PM EDT     5.54 feet High Tide
Tue -- 08:30 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston, South Carolina, Tide feet
12
am
0.9
1
am
1.2
2
am
2.1
3
am
3
4
am
3.8
5
am
4.3
6
am
4.3
7
am
4
8
am
3.2
9
am
2.3
10
am
1.4
11
am
0.7
12
pm
0.5
1
pm
0.8
2
pm
1.8
3
pm
3
4
pm
4.2
5
pm
5
6
pm
5.5
7
pm
5.4
8
pm
4.9
9
pm
3.9
10
pm
2.8
11
pm
1.7


Tide / Current for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
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Tue -- 12:36 AM EDT     0.00 knots Slack
Tue -- 02:35 AM EDT     1.18 knots Max Flood
Tue -- 03:19 AM EDT     Moonset
Tue -- 05:47 AM EDT     -0.00 knots Slack
Tue -- 06:11 AM EDT     Sunrise
Tue -- 09:22 AM EDT     -1.66 knots Max Ebb
Tue -- 12:29 PM EDT     0.00 knots Slack
Tue -- 03:04 PM EDT     1.49 knots Max Flood
Tue -- 05:32 PM EDT     Moonrise
Tue -- 06:55 PM EDT     -0.00 knots Slack
Tue -- 08:30 PM EDT     Sunset
Tue -- 10:14 PM EDT     -2.21 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston Harbor Entrance, South Carolina Current, knots
12
am
-0.6
1
am
0.4
2
am
1.1
3
am
1.1
4
am
0.8
5
am
0.4
6
am
-0.1
7
am
-0.8
8
am
-1.3
9
am
-1.6
10
am
-1.6
11
am
-1.1
12
pm
-0.4
1
pm
0.4
2
pm
1.2
3
pm
1.5
4
pm
1.4
5
pm
1.1
6
pm
0.7
7
pm
-0.1
8
pm
-1
9
pm
-1.8
10
pm
-2.2
11
pm
-2


Weather Map
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GEOS Local Image of southeast   
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Charleston, SC,




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