Marine Weather Net

Charleston Harbor Marine Forecast


5 - 10


5 - 10


5 - 10



The Marine Weather Forecast In Detail:
AMZ330 Forecast Issued: 1007 PM EDT Wed Aug 04 2021

Rest Of Tonight...N Winds 5 To 10 Kt.
Thu...Ne Winds 5 To 10 Kt, Becoming E In The Afternoon. A Chance Of Showers With A Slight Chance Of Tstms In The Afternoon.
Thu Night...E Winds 5 To 10 Kt. A Chance Of Showers With A Slight Chance Of Tstms.
Fri...Ne Winds 5 Kt, Becoming S In The Afternoon. Showers Likely. A Slight Chance Of Tstms In The Morning, Then A Chance Of Tstms In The Afternoon.
Fri Night...S Winds 10 Kt. Showers Likely With A Chance Of Tstms.
Sat...Sw Winds 10 Kt. Showers Likely With A Chance Of Tstms.
Sat Night...Sw Winds 5 To 10 Kt. A Chance Of Tstms. Showers Likely, Mainly In The Evening.
Sun...Sw Winds 5 To 10 Kt. A Chance Of Showers And Tstms.
Sun Night...Sw Winds 5 Kt. A Slight Chance Of Showers And Tstms.
Mon...Sw Winds 5 Kt. A Chance Of Showers And Tstms.
Mon Night...S Winds 5 Kt. A Slight Chance Of Showers And Tstms. Mariners Are Reminded That Winds And Waves Higher In And Near Tstms. Unless Otherwise Noted, Waves 1 Foot Or Less. Charleston Harbor Water Temperature 84 Degrees.
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Area Forecast Discussion
National Weather Service Charleston SC
1015pm EDT Wednesday August 4 2021

A stalled front will linger over or near the area through the week. More typical summertime weather should then return early next week.

Near Term - Until 6am Thursday Morning
Late this evening: The light showers from earlier in the evening have since dissipated completely and we are now precipitation- free. There is some dissipating convection south of the Altamaha, and that could bring an increasing chance of showers along the Georgia coast beginning in the early morning hours. Overall, no changes to the forecast through sunrise.

Short Term - 6am Thursday Morning Through Saturday
Forecast confidence: Moderate.

Thursday: Surface high pressure wedging into the area from the north to start the day will weaken and allow the low pressure near the FL panhandle along the stalled front and some deeper moisture to shift a bit northward into GA. More of an onshore flow/weak sea breeze along with deeper moisture should allow for some showers/isolated storms, mainly later in the day near the GA coast, then shifting more north into SC Thursday night. Locally heavy rainfall/flooding will be possible.

Friday: Strengthening low-level flow should allow for the surface front to shift inland and with deeper moisture in place we should see higher rain chances/amounts, especially inland. Some more showers/storms are possible Friday night as the upper trough shifts closer and deep moisture remains in place. Localized heavy rain/flooding will be possible through the period.

Saturday: The upper trough should linger over the Deep South with continued favorable conditions for showers and storms. Some of the rain could be heavy so localized flooding will still be possible. Temperatures should be a bit warmer than previous days but still likely below normal.

Long Term - Saturday Night Through Wednesday
Forecast confidence: Moderate.

Upper troughing to start the period will give way to more ridging with a return to more typical summertime conditions expected. Highs generally in the lower to mid 90s away from the coast with lows in the lower to mid 70s inland.

Through Tonight: A stationary front will remain positioned offshore with winds northerly to northeasterly generally 10 to 15 knots. Seas will average 2 to 4 feet.

Thursday through Monday: Moderate confidence this period. Atlantic high pressure along with an inland stalled front/trough will prevail through the period. Mainly south to southwest winds could briefly get near Small Craft Advisory levels at times across a portion of the southern SC/northern GA coastal waters but confidence is low in the need/timing for any headlines at this time.

NOAA Charleston SC Office: Watches - Warnings - Advisories
GA...None. SC...None. MARINE...None.