Edisto Beach, SC to Savannah, GA Marine Forecast
| Today...S Winds 10 Kt. Seas 3 Ft. Wave Detail: Se 3 Ft At 6 Seconds. A Chance Of Showers And Tstms Early This Morning, Then A Slight Chance Of Showers And Tstms Late This Morning. A Chance Of Showers And Tstms Early This Afternoon. |
| Tonight...S Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: Se 3 Ft At 6 Seconds. |
| Fri...Sw Winds 5 To 10 Kt, Becoming S 10 To 15 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 7 Seconds And Sw 1 Foot At 4 Seconds. A Slight Chance Of Showers And Tstms. |
| Fri Night...Sw Winds 10 Kt. Seas 3 Ft. Wave Detail: Se 3 Ft At 8 Seconds. |
| Sat...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 8 Seconds. |
| Sat Night...Sw Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: Se 3 Ft At 8 Seconds And S 2 Ft At 4 Seconds. |
| Sun...Sw Winds 10 Kt. Seas 2 To 3 Ft. A Slight Chance Of Showers And Tstms. |
| Sun Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. A Chance Of Showers And Tstms. |
| Mon...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft. A Chance Of Showers And Tstms. |
| Mon Night...Sw Winds 5 To 10 Kt. Seas 2 Ft. Showers Likely With A Chance Of Tstms. Winds And Seas Higher In And Near Tstms. |
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Area Forecast Discussion National Weather Service Charleston SC 712am EDT Thu July 17 2025 Synopsis Atlantic high pressure will prevail through the weekend. A cold front may sag into the area early next week. Near Term - Through Tonight Today: Aloft, the ridge centered across the western Atlantic will stretch further back to the west and extend inland across GA and the Carolinas, all the way to the Southern Plains. At the surface, a classic summertime setup with the subtropical high solidly in control driving generally southerly flow across the area. Model consensus is good, favoring very little diurnal convection across the area. Soundings feature very warm profiles, weak lapse rates, and MLCAPE values struggling to reach 1,000 J/kg. All this, with the influence of the ridge aloft should result is very little coverage this afternoon. There are some DCAPE values of 1,000 J/kg or higher, so if a storm can get going there could be a gusty wind threat. But overall, the expectation is for nothing more than isolated coverage likely not until the mid to late afternoon. Another consequence of the ridge aloft will be warming temperatures. Highs are expected to reach the low to mid 90s for the area away from the immediate coast. These temperatures combined with dewpoints in the low to mid 70s should yield heat index values mostly in the 100-105 degree range. Tonight: If there are any showers or storms lingering from the afternoon, they will dissipate quickly with the loss of diurnal heating. The rest of the overnight should be quiet with lows in the mid to upper 70s. Short Term - Friday Through Sunday A deep layered ridge will prevail through the weekend, maintaining fairly typical conditions for summer in the South. Temperatures will slowly climb through the period, with highs reaching the mid to upper 90s in most areas away from the coast on Sunday. Heat indices could top 108 degrees in parts of the area Saturday and Sunday, so we may end up needing Heat Advisories. Fairly strong mid-level subsidence will limit the convection potential so we are carrying 20-30% PoPs. Long Term - Sunday Night Through Wednesday A more active pattern is on tap for early to mid next week as the upper ridge axis shifts west and a series of shortwaves rotates into the area from the north. Additionally, a weak surface front is forecast to sag into the area Monday afternoon, then linger in the area. Marine Today And Tonight The subtropical high will be the primary feature through the period and will continue to drive elevated south to southwest flow. Wind speeds will top out in the 15-20 knot range at times, especially along the land/sea interface this afternoon and through the evening. Seas should average around 3 feet through the period. Isolated to scattered showers and thunderstorms could impact portions of the waters early this morning, but for the most part conditions should be quiet. Typical summertime weather pattern with moderate southerly flow will prevail Friday through Monday. Headlines not expected. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...None. SC...None. Marine None. |
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