Charleston Harbor Marine Forecast
| Today...Sw Winds 5 To 10 Kt, Becoming S 10 To 15 Kt With Gusts To 20 Kt This Afternoon. |
| Tonight...Sw Winds 10 To 15 Kt. |
| Fri...Sw Winds 5 To 10 Kt. |
| Fri Night...Sw Winds 5 To 10 Kt. |
| Sat...Sw Winds 5 To 10 Kt. |
| Sat Night...S Winds 10 Kt. |
| Sun...W Winds 10 To 15 Kt. |
| Sun Night...N Winds 10 To 15 Kt, Increasing To 15 To 20 Kt. Waves Building 1 To 2 Ft. |
| Mon...Ne Winds 10 To 15 Kt. |
| Mon Night...Ne Winds 5 To 10 Kt. Unless Otherwise Noted, Waves 1 Foot Or Less. Charleston Harbor Water Temperature 69 Degrees. |
| Area Forecast Discussion National Weather Service Charleston SC 210pm EDT Sunday September 27 2026 .WHAT HAS CHANGED... All sections have been updated. .KEY MESSAGES... - 1) The coastal flood risk will linger into early next week. - 2) Rising temperatures through Tuesday, remaining above normal next week. KEY MESSAGE 1: The coastal flood risk will linger into early next week. As a nor'easter churns offshore of the Eastern Seaboard, steady west- northwesterly flow will continue across the Lowcountry and southeast Georgia. Even though this will create a less favorable environment for coastal flooding, the astro tide will still be elevated given the recent full moon. Thus, still expect to see minor coastal flooding with each high tide cycle through early next week (esp. for the Charleston Harbor). Charleston Harbor: With the ongoing environmental conditions, tidal levels could reach 7.1 ft MLLW in the Charleston Harbor during the next two high tides at roughly 9 pm this evening and 9 am Monday morning. A new coastal flood advisory has been issued for the upcoming high tide. Thereafter, it's likely to see minor coastal flooding continue through early next week for the Charleston Harbor. Fort Pulaski: While tides will remain elevated at Ft Pulaski, they should remain below minor flooding ranging around 9 to 9.1 FT MLLW through the early part of this week. KEY MESSAGE 2: Rising temperatures through Tuesday, remaining above normal next week. As a nor'easter continues to impact the northeast coast, pleasantly warm conditions are occurring across the southeast region as a weak coastal trough sets up. Highs this afternoon are expected to peak in the lower to upper 80s, warmest south of the I-16 corridor, with mostly clear skies. Did have to lower dew points a smidge this afternoon through Monday, and lowered overnight temperatures given a similar radiational cooling setup, with lower to upper 50s expected inland and lower/mid 60s along the coast. Temperatures will continue to rise to start off the week as upper level ridging strengthens, with the coastal trough pushing further inland and up the coast each day as a surface high pressure moves into the Ohio River Valley. As a result, Monday will be a touch warmer as the mid-80s build northwards and upper 80s become likely south of the I-16 corridor, with widespread mid 80s to lower 90s on Tuesday. Higher PWATs (Precipitable Waters) build into the region Thursday into Friday as a subtropical high pressure develops off to our north, though precipitation chances remain low due to the ridge axis sliding overhead during that period. Better chances for rain come as the ridge axis slides eastwards later this week into the weekend. Marine Through Thursday: No marine concerns expected as surface high pressure becomes the dominant feature across the local waters. As a high pressure shifts northeastwards of the area on Tuesday, a weak coastal sea breeze will develop in the afternoon hours, leading to marginally breezy conditions along the coast. Rip Currents A lingering 10-12s backswell directed towards the Georgia and Florida coasts will support a moderate rip current risk from Tybee Island south to Sapelo Island today. Otherwise, a low risk is anticipated for the lower South Carolina beaches today, with a low rip current risk at all area beaches on Monday. NOAA Charleston SC Office: Watches - Warnings - Advisories GA...None. SC...Coastal Flood Advisory from 8pm to 11pm EDT this evening for SCZ150. Marine None. |
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