South Santee River to Edisto Beach, SC Marine Forecast
| Tonight...E Winds 10 To 15 Kt With Gusts To 20 Kt, Becoming S Late This Evening, Then Becoming W 20 To 25 Kt After Midnight. Seas 4 To 6 Ft, Subsiding To 4 To 5 Ft After Midnight. Wave Detail: E 5 Ft At 11 Seconds, Becoming E 5 Ft At 11 Seconds And Sw 4 Ft At 4 Seconds. A Chance Of Showers After Midnight. A Chance Of Showers With A Slight Chance Of Tstms Late. |
| Thu...W Winds 15 To 20 Kt With Gusts To 25 Kt. Seas 4 To 6 Ft, Subsiding To 4 To 5 Ft In The Afternoon. Wave Detail: W 4 Ft At 5 Seconds And E 4 Ft At 10 Seconds, Becoming W 4 Ft At 6 Seconds And E 3 Ft At 9 Seconds. |
| Thu Night...W Winds 20 To 25 Kt, Diminishing To 15 To 20 Kt After Midnight. Seas 4 To 5 Ft, Building To 4 To 6 Ft After Midnight. Wave Detail: W 5 Ft At 5 Seconds And E 2 Ft At 10 Seconds, Becoming W 5 Ft At 6 Seconds And E 3 Ft At 13 Seconds. |
| Fri...Nw Winds 15 To 20 Kt, Becoming W 10 Kt In The Afternoon. Seas 4 To 6 Ft. Wave Detail: W 4 Ft At 6 Seconds And Se 4 Ft At 13 Seconds. |
| Fri Night...Nw Winds 10 To 15 Kt. Seas 4 To 5 Ft, Subsiding To 3 To 4 Ft After Midnight. Wave Detail: Se 4 Ft At 12 Seconds And W 2 Ft At 5 Seconds, Becoming Se 3 Ft At 11 Seconds And W 2 Ft At 4 Seconds. |
| Sat...N Winds 5 To 10 Kt. Seas 3 To 4 Ft, Subsiding To 2 To 3 Ft In The Afternoon. Wave Detail: Se 3 Ft At 10 Seconds And W 2 Ft At 4 Seconds, Becoming Se 3 Ft At 10 Seconds And Sw 1 Foot At 4 Seconds. |
| Sat Night...Ne Winds 5 To 10 Kt. Seas 2 To 3 Ft. |
| Sun...Ne Winds 10 To 15 Kt. Seas 2 To 3 Ft. |
| Sun Night...E Winds 10 To 15 Kt. Seas 3 To 4 Ft. A Slight Chance Of Showers. |
| Mon...E Winds 15 To 20 Kt. Seas 4 To 6 Ft. A Slight Chance Of Showers. |
| Mon Night...Ne Winds 15 To 20 Kt. Seas 5 To 7 Ft. A Slight Chance Of Showers And Tstms. Winds And Seas Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Charleston SC 835pm EDT Wednesday Oct 29 2025 Synopsis A cold front will move through the region tonight, followed by high pressure through the weekend. A low pressure system could impact the area early next week. Near Term - Until 6am Thursday Morning Tonight: The CAD will be slow to erode early, despite a weak warm front attempting to lift north across part of the area. A few sprinkles are possible ahead of a cold front approaching the region with radar returns occurring west of I-95, but rainfall accumulation is expected to remain light with perhaps little to no accumulation until the cold front shifts across the local area. Until then, cloudy conditions will reside over most locations, the exception being across Southeast Georgia (south of the warm front). The cold front, currently depicted across central Georgia, will race across the local area during the next few hours and should be accompanied with a swath/line of showers, but given the rapid movement and absence of deep moisture, rainfall accumulation is unlikely to be more than a few tenths of an inch for any given location. An abrupt wind shift is expected immediately following cold frontal passage with substantially drier air clearing out skies from west to east starting by around midnight. Low-level mixing is anticipated through the night with cold air advection post frontal passage. so a 10-15 mph wind from the west will be common into daybreak. Gusts to top out near 20 mph across Lake Moultrie and along the South Carolina/Georgia coast. Cold air advection in combination with clearing skies should support low temps in the low-mid 40s inland to upper 40s/around 50 near the coast. Short Term - 6am Thursday Morning Through Saturday Decreasing clouds on Thursday will give way to mostly clear skies Thursday night through Saturday as dry high pressure expands over the area. Strong radiational cooling will occur both Thursday night and Friday night. Friday morning lows will be in the low to mid 40s inland from the coast while Saturday morning could be a couple of degrees cooler. It still appears that we will stay out of Frost Advisory territory Saturday morning since temperatures typically need to be lower than 36 degrees for appreciable frost formation. Long Term - Saturday Night Through Wednesday A deepening closed upper low will drop into Louisiana late Sunday, then slowly shift off the Southeast coast by Tuesday or Wednesday. A surface low could move through the local area, bringing the next appreciable rain chances. Marine Tonight: East/southeast winds will prevail across local waters as a warm front attempts to lift north while high pressure remains inland. An uptick in wind speeds is anticipated approaching midnight, followed by an abrupt wind shift once a cold front shifts across local waters. West winds could gust up to 25-30 kt outside the Charleston Harbor as cold air advection leads to favorable mixing post frontal passage. Seas should also range between 3-5 ft across nearshore waters and 4-6 ft across outer Georgia waters early evening, then build up to 4-6 ft across nearshore waters and 6-8 ft across outer Georgia waters approaching daybreak post frontal passage. Small Craft Advisories will be in effect for local waters outside the Charleston Harbor through the night. 25-30 kt wind gusts will continue into Thursday night for most of the marine area due to cold advection behind the front. Elevated seas will persist into Friday afternoon for portions of the waters, after which all Small Craft Advisories will drop off. Rip Currents Modest swell energy will continue on Thursday, maintaining a Moderate Risk for rip currents along all local SC/GA beaches. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...None. SC...None. Marine Small Craft Advisory until 4pm EDT Friday for AMZ350-374. Small Craft Advisory until 11pm EDT Thursday for AMZ352-354. |
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