Marine Forecast AMZ330

Expires:202604162315;;989635
FZUS52 KCHS 160903
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
503 AM EDT Thu Apr 16 2026

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


AMZ330-162315
Charleston Harbor
503 AM EDT Thu Apr 16 2026

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.

Coastal South Eastern United States

NC, SC, GA, East Coast FL, PR & USVI

• Synopsis for eastern North Carolina coastal waters
• Albemarle Sound
• Alligator River
• Pamlico Sound
• Pamlico and Pungo Rivers
• Neuse and Bay Rivers
• S of Currituck Beach Light to Oregon Inlet NC out 20 NM
• S of Oregon Inlet to Cape Hatteras NC out 20 NM
• S of Cape Hatteras to Ocracoke Inlet NC out 20 NM
• S of Ocracoke Inlet to Cape Lookout NC out 20 NM
• S of Cape Lookout to N of Surf City NC out 20 NM


• Synopsis for Surf City, NC to Santee River, SC out 20 NM
• Coastal waters from Surf City to Cape Fear, NC out 20 NM
• Coastal waters from Cape Fear to Little River Inlet, SC out 20 NM
• Coastal waters from Little River Inlet, SC to Murrells Inlet, SC out 20 NM
• Coastal waters from Murrells Inlet to South Santee River, SC out 20 NM


• Synopsis for South Santee River SC to Savannah GA out 20 NM and Savannah GA to Altamaha Sounds GA out 60 NM...Including Charleston Harbor and Grays Reef National Marine Sanctuary"
• Coastal waters from South Santee River, GA to Edisto Beach, SC out 20 NM
• Coastal waters from Edisto Beach, SC to Savannah, GA out 20 NM
• Charleston Harbor
• Coastal Waters from Savannah, GA to Altamaha Sound, GA out 20 NM, including Grays Reef National Marine Sanctuary
• Waters from Savannah, GA to Altamaha Sound, GA extending 20 to 60 NM


• Synopsis for Altamaha Sound, GA to Flagler Beach, FL out 60 NM
• Coastal waters from Altamaha Sound, GA to Flagler Beach, FL out to 20 NM
• Waters from Atlamaha Sound, GA to Fernandina Beach, FL extending 20 NM to 60 NM
• Coastal waters from Fernandina Beach to St. Augustine, FL out 20 NM
• Waters from Fernandina Beach to St. Augustine, FL extending 20 NM to 60 NM
• Coastal waters from St. Augustine to Flager Beach, FL out 20 NM
• Waters from St. Augustine to Flager Beach, FL extending 20 NM to 60 NM


• Synopsis for Flagler Beach to Jupiter Inlet, FL 60 NM
• Flagler Beach to Volusia-Brevard County Line 0-20NM
• Volusia-Brevard County Line to Sebastian Inlet 0-20NM
• Sebastian Inlet to Jupiter Inlet 0-20NM
• Flagler Beach to Volusia-Brevard County Line 20-60NM
• Volusia-Brevard County Line to Sebastian Inlet 20-60NM
• Sebastian Inlet to Jupiter Inlet 20-60NM


• Synopsis for Jupiter Inlet to Ocean Reef Out 60 NM
• Lake Okeechobee, FL
• Coastal waters from Jupiter Inlet to Deerfield Beach, FL out 20 NM
• Waters from Jupiter Inlet to Deerfield Beach, FL extending 20 NM to 60 NM
• Biscayne Bay, FL
• Coastal waters from Deerfield Beach to Ocean Reef, FL out 20 NM
• Waters from Deerfield Beach to Ocean Reef, FL extending 20 NM to 60 NM


• Synopsis for Florida Bay and the Keys
• Florida Bay including Blackwater and Buttonwood Sounds
• Bayside and Gulfside from Craig Key to Halfmoon Shoal out to 5 fathoms
• Gulf waters from East Cape Sable to Chokoloskee 20 to 60 nm out and beyond 5 fathoms
• Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel
• Hawk Channel from Ocean Reef to Craig Key out to the reef
• Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef
• Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef
• Straits of Florida from Ocean Reef to Craig Key out 20 nm
• Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 nm
• Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 nm
• Straits of Florida from Halfmoon Shoal to GMZ055 20 nm west of Dry Tortugas out 20 nm
• Straits of Florida from Ocean Reef to Craig Key 20 to 60 nm out
• Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 nm out
• Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 nm out
• Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas 20 to 60 nm out


• Synopsis for Puerto Rico and the U.S. Virgin Islands coastal waters
• Atlantic Waters of Puerto Rico and U.S. VI from 10 NM to 19.5 N
• Coastal Waters of Northern Puerto Rico out 10 NM
• Coastal Waters of Northern U.S. VI and Culebra out 10 NM
• Anegada Passage Southward to 17 N
• Coastal Waters of Southern U.S. VI, Vieques, and Eastern Puerto Rico out 10 NM
• Caribbean Waters of Puerto Rico and U.S. VI from 10 NM to 17 N
• Coastal Waters of Southern Puerto Rico out 10 NM
• Mona Passage Southward to 17 N
• Coastal Waters of Northwestern Puerto Rico out 10 NM
• Coastal Waters of Southwestern Puerto Rico out 10 NM