South Santee River to Edisto Beach, SC Marine Forecast
| Today...Sw Winds 10 To 15 Kt With Gusts To 20 Kt. Seas 3 Ft. Wave Detail: S 3 Ft At 4 Seconds And Se 3 Ft At 9 Seconds. |
| Tonight...Sw Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: S 3 Ft At 4 Seconds And E 2 Ft At 9 Seconds. |
| Fri...Sw Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: S 3 Ft At 5 Seconds And E 2 Ft At 9 Seconds. |
| Fri Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: S 2 Ft At 5 Seconds And Se 2 Ft At 9 Seconds. |
| Sat...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: S 2 Ft At 5 Seconds And Se 2 Ft At 8 Seconds. |
| Sat Night...S Winds 10 To 15 Kt. Seas 3 To 4 Ft. Wave Detail: S 3 Ft At 5 Seconds And Se 2 Ft At 8 Seconds. |
| Sun...Sw Winds 15 To 20 Kt. Seas 3 To 4 Ft. |
| Sun Night...N Winds 20 To 25 Kt With Gusts To 30 Kt. Seas 4 To 5 Ft. |
| Mon...Ne Winds 20 To 25 Kt With Gusts To 30 Kt. Seas 4 To 6 Ft. |
| Mon Night...Ne Winds 15 To 20 Kt. Seas 3 To 4 Ft. |
| Area Forecast Discussion National Weather Service Charleston SC 235pm EDT Sat May 16 2026 .WHAT HAS CHANGED... All sections have been updated. .KEY MESSAGES... - 1) Minor coastal flooding expected along portions of the southeast South Carolina coast with the evening high tide cycles into early next week. - 2) Mostly dry conditions expected into early next week with above normal temperatures. Increasing rain chances to occur late next week. KEY MESSAGE 1: Minor coastal flooding expected along portions of the southeast South Carolina coast with the evening high tide cycles into early next week. Astronomical influences associated with the new moon (5/16) and lunar perigee (5/17) along with a modest southeasterly onshore flow will help drive elevated tide levels through the weekend, leading to minor coastal flooding along the southeast South Carolina and southeast Georgia coast. The highest chance for minor coastal flooding will be at the Charleston Harbor tide gage, while a much lower potential exists at Fort Pulaski. The latest forecast advertises peak evening high tides around 7.2-7.3 ft MLLW for this evening and Sunday evening high tide cycles for the Charleston Harbor. A Coastal Flood Advisory has therefore been issued for Coastal Colleton and Charleston Counties between 7pm to 11pm this evening. Additional Coastal Flood Advisories will likely be needed through the weekend, and possibly into Monday. Astronomical tide levels will then begin to fall early next week and the potential for minor coastal flooding will diminish. KEY MESSAGE 2: Mostly dry conditions expected into early next week with above normal temperatures. Increasing rain chances to occur late next week. Surface high pressure will extend across the Southeast through the middle of next week, with ridging building aloft. There could be isolated diurnal convection Sunday, but most locations will likely stay dry due to limited coverage. Temperatures will be warmer than normal. Highs will average in the 85-90F range away from the immediate coast, with mild overnight lows. There will be better chances for showers and thunderstorms during the latter half of next week. While there is still spread between models, consensus indicates shortwave energy crossing the region with a surface cold front approaching and possibly stalling nearby. Marine Today And Tonight A weak/subtle coastal trough along the western periphery of high pressure centered across the Atlantic will result in a southerly wind regime across local waters for the remainder of the day and through the night, with with speeds generally less than 10-15 kt (except in the Charleston Harbor this afternoon). Seas will range between 1-3 ft. Sunday through Thursday: No marine concerns are expected. High pressure to the east will drive onshore southeasterly flow each day, with wind speeds mostly topping out in the 10-15 knot range. Each afternoon and evening there could be some local enhancement along the land/sea interface with the diurnal sea breeze. Seas should average 2-3 feet through the period. Rip Currents The combination of influences from the upcoming new moon cycle and persistent onshore flow will produce an elevated risk of rip currents into early next week. A Moderate Risk of rip currents is in effect at all southeast South Carolina and southeast Georgia beaches Sunday and Monday. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...None. SC...Coastal Flood Advisory from 7pm to 11pm EDT this evening for SCZ149-150. Marine None. |
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