Coastal Waters Forecast
Issued by NWS Charleston, SC
Issued by NWS Charleston, SC
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428 FZUS52 KCHS 181921 CWFCHS Coastal Waters Forecast National Weather Service Charleston SC 321 PM EDT Tue Jun 18 2024 South Santee River SC to Savannah GA out 20 NM and Savannah GA to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary AMZ300-190830- 321 PM EDT Tue Jun 18 2024 .Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... High pressure will extend across the region this week. A trough of low pressure will impact the Southeast U.S coast Thursday into Friday. $$ AMZ330-190830- Charleston Harbor- 321 PM EDT Tue Jun 18 2024 .TONIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt with gusts to 20 kt. .WED...E winds 10 to 15 kt, increasing to 20 kt in the afternoon. Waves 1 to 2 ft. A slight chance of showers and tstms. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves 1 to 2 ft. A slight chance of showers and tstms. .THU...E winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A slight chance of showers and tstms. .THU NIGHT...E winds 15 to 20 kt with gusts to 25 kt, becoming NE 10 kt after midnight. Waves 1 to 2 ft. A slight chance of tstms. A slight chance of showers in the evening, then a chance of showers after midnight. .FRI...E winds 10 kt. A chance of showers and tstms. .FRI NIGHT...E winds 5 to 10 kt, becoming SE after midnight. A chance of showers and tstms, mainly in the evening. .SAT...SE winds 5 to 10 kt. A chance of showers and tstms. .SAT NIGHT...S winds 5 to 10 kt. A slight chance of showers and tstms. .SUN...S winds 5 to 10 kt. A chance of showers and tstms. .SUN NIGHT...S winds 10 kt. A slight chance of showers and tstms. Winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston Harbor water temperature 83 degrees. $$ AMZ350-190830- Waters from South Santee River to Edisto Beach SC out 20 NM- 321 PM EDT Tue Jun 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT... .TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 4 to 6 ft after midnight. Wave Detail: E 5 ft at 7 seconds and SE 1 foot at 12 seconds, becoming E 5 ft at 7 seconds. A slight chance of showers early this evening. .WED...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, building to 5 to 6 ft in the afternoon. Wave Detail: E 5 ft at 8 seconds, becoming E 5 ft at 7 seconds. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds. A slight chance of showers and tstms. .THU...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A slight chance of showers and tstms. .THU NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A chance of showers with a slight chance of tstms. .FRI...E winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds. Showers likely with a chance of tstms. .FRI NIGHT...E winds 10 kt, becoming SE after midnight. Seas 4 to 5 ft. A chance of showers and tstms. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ352-190830- Waters from Edisto Beach SC to Savannah GA out 20 NM- 321 PM EDT Tue Jun 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT... .TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 4 to 6 ft after midnight. Wave Detail: E 5 ft at 6 seconds and SE 1 foot at 12 seconds, becoming E 5 ft at 7 seconds. A slight chance of tstms early this evening. A slight chance of showers this evening. A slight chance of showers late. .WED...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, building to 5 to 6 ft in the afternoon. Wave Detail: E 5 ft at 8 seconds, becoming E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .WED NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 5 ft at 7 seconds. A chance of showers with a slight chance of tstms. .THU...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon. .THU NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A chance of showers with a slight chance of tstms. .FRI...E winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds. Showers likely with a chance of tstms. .FRI NIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. A chance of tstms. Showers likely, mainly in the evening. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SAT NIGHT...S winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms. .SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ354-190830- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- 321 PM EDT Tue Jun 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT... .TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 5 ft, building to 4 to 6 ft. Wave Detail: E 5 ft at 6 seconds and E 1 foot at 12 seconds. A chance of showers with a slight chance of tstms early this evening, then a slight chance of showers late this evening. .WED...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 5 to 6 ft in the afternoon. Wave Detail: E 5 ft at 8 seconds, becoming E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .WED NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .THU...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .THU NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A chance of showers with a slight chance of tstms. .FRI...E winds 10 to 15 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds. Showers likely with a chance of tstms. .FRI NIGHT...E winds 10 to 15 kt with gusts to 20 kt, becoming SE 5 to 10 kt after midnight. Seas 3 to 4 ft. A chance of tstms. Showers likely, mainly in the evening. .SAT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SAT NIGHT...S winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms. .SUN...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$ AMZ374-190830- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 321 PM EDT Tue Jun 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft, building to 6 to 7 ft after midnight. Wave Detail: E 6 ft at 7 seconds and E 1 foot at 12 seconds. A chance of showers with a slight chance of tstms early this evening, then a slight chance of showers late this evening. .WED...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .WED NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to 7 ft, building to 6 to 8 ft after midnight. Wave Detail: E 6 ft at 8 seconds. A chance of showers with a slight chance of tstms. .THU...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 8 seconds. A chance of showers with a slight chance of tstms. .THU NIGHT...NE winds 15 kt with gusts to 25 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 9 seconds. Showers likely with a chance of tstms. .FRI...E winds 10 to 15 kt with gusts to 25 kt. Seas 5 to 7 ft, subsiding to 5 to 6 ft in the afternoon. Wave Detail: E 7 ft at 9 seconds, becoming E 6 ft at 9 seconds. Showers likely with a chance of tstms. .FRI NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Showers likely with a chance of tstms. .SAT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Showers likely with a chance of tstms. .SAT NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers and tstms. .SUN...S winds 5 to 10 kt. Seas 3 ft. A chance of showers and tstms. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. $$