Savannah, GA to Altamaha Sound, GA including Grays Reef National Marine Sanctuary Marine Forecast
| Today...S Winds 10 To 15 Kt With Gusts To 20 Kt. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 9 Seconds And S 2 Ft At 4 Seconds. |
| Tonight...S Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: S 3 Ft At 4 Seconds And E 3 Ft At 9 Seconds. |
| Fri...Sw Winds 5 To 10 Kt, Becoming S In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 9 Seconds And S 2 Ft At 5 Seconds. |
| Fri Night...S Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: Se 3 Ft At 9 Seconds. |
| Sat...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 8 Seconds. |
| Sat Night...S Winds 10 To 15 Kt. Seas 3 Ft. Wave Detail: S 3 Ft At 4 Seconds And Se 3 Ft At 8 Seconds. |
| Sun...Sw Winds 10 To 15 Kt. Seas 2 To 3 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 5 To 7 Ft. |
| Mon Night...E Winds 15 To 20 Kt. Seas 4 To 5 Ft. |
| Area Forecast Discussion National Weather Service Charleston SC 653am EDT Monday May 25 2026 .WHAT HAS CHANGED... .KEY MESSAGES... - 1) Increased chances for showers and thunderstorms early this week. KEY MESSAGE 1: Increased chances for showers and thunderstorms early this week. Early this morning, satellite water vapor indicate a large plume of moisture across the Southeast U.S. The moisture plume was positioned between a deep H5 trough centered over the Southern Plains and a 590 DM ridge centered over the western Atlantic. Water vapor and RAP40 indicates several vort maxes within the moisture plumes, tracking SW to NE along the H5 heights. These disturbances will likely trigger rounds of showers and thunderstorms across the region this morning into the daylight hours. Using a blend of MOS, high temperatures are forecast to range in the mid to upper 80s by early this afternoon. The surface pattern will yield light SSE winds across SE GA/SC. A sea breeze should readily develop by late this morning, then push inland this afternoon. Given temperatures well into the 80s with dewpoints in the low to mid 70s, SBCAPE should build to 1500-2000 J/kg this afternoon. As the case the past few days, a broken band of showers and thunderstorms should develop along and west of the sea breeze this afternoon. Forecast soundings indicate storm motions less than 10 mph this afternoon and evening. Give PW values (Precipitable Water values) around 2 inches, these slow moving storms should yield very efficient rainfall rates along and inland of the sea breeze. The 0Z HREF indicates the greatest potential for heavy rainfall should once again occur over inland GA, with a 10-30% of 3"/3hr. WPC has highlighted our inland GA counties with a marginal risk for excessive rainfall. Tuesday: Conditions are not expected to change much from today, with comparable temperatures and moisture content. The sea breeze will again be the focus for the initial thunderstorm activity, then coverage should expand across inland areas. Locally heavy rainfall is possible generally west of I-95. The ridge of high pressure aloft to our east restrengthens a bit on Tuesday, which will continue our warm and moist conditions across the southeast United States into the end of the week. This will also continue our daily chances for showers and thunderstorms, which will be primarily forming along an early afternoon sea breeze and then expanding inland before dissipating into the overnight hours. With PWATs (Precipitable Waters) remaining near 2 inches, locally heavy rainfall will remain possible. Temperatures look to remain above average, with daily highs in the upper 80s to lower 90s and overnight lows in the mid 60s to mid 70s, possibly resulting in record high minimum (warm overnight low) temperatures. As a surface low pressure moves off the northeast coast late this week, a weak cold front is expected to push into the southeast region. Models continue to suggest this occurring Thursday into Friday, with the front lingering into the weekend before cooler air arrives as a surface high pressure slides down. The cooler temperatures look be rather refreshing, with high temperatures in the upper 70s to lower 80s. Marine Today And Tonight High pressure centered over the western Atlantic will remain remain over the marine zones. As a result, winds will generally remain from the SSE through the period, favoring speeds between 10 to 15 kts. Wave heigheights are expected to range between 3 to 5 ft. Tuesday through Friday: Conditions are forecast to remain below Small Craft Advisory criteria into the end of the week, with daily chances for showers and thunderstorms. High pressure to the east will drive onshore ESE flow on Tuesday, though the surface high pressure slides a little closer on Wednesday causing winds to shift to become out of the WSW, though still remaining well below small craft criteria. Thursday and Friday will see a stalled front near the area, keeping winds on the weaker side. Rip Currents A modest easterly swell around 3ft/8s and sea breeze influences each afternoon will keep the rip current risk in the moderate category at all area beaches through Tuesday. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...None. SC...None. Marine None. |
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