Use caution
Winds or seas hazardous to small boats are forecast or occurring. Thresholds vary by marine area.
What to do
Collected NWS data
Flagler Beach to Volusia-Brevard County Line 20-60 nm, Sebastian Inlet to Jupiter Inlet 0-20 nm, Sebastian Inlet to Jupiter Inlet 20-60 nm and 2 more
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM, Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM, Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM
Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM, Coastal waters from St. Augustine to Flagler Beach FL out 20 NM
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM, Coastal waters from South Santee River to Edisto Beach SC out 20 NM, Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM
Cape Decision to Cape Edgecumbe from 15 to 80 NM, Cape Decision to Cape Edgecumbe out to 15 NM
Dixon Entrance to Cape Decision from 15 to 90 NM, Dixon Entrance to Cape Decision out to 15 NM
Cape Edgecumbe to Cape Spencer from 15 to 80 NM, Cape Edgecumbe to Cape Spencer out to 15 NM, Cape Fairweather to Icy Cape from 15 to 80 NM and 11 more
Cape Decision to Cape Edgecumbe out to 15 NM, Dixon Entrance to Cape Decision out to 15 NM
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA including Santa Cruz Island, Inner waters from Point Mugu to San Mateo Pt. CA including Santa Catalina and Anacapa Islands, Outer waters from Santa Cruz Island to San Clemente Island to 60 NM offshore including San Nicolas and Santa Barbara Islands and 2 more
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm, Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm, Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm and 1 more
Waters from Pigeon Point to Point Pinos 10-60 NM, Waters from Point Arena to Point Reyes 10-60 NM, Waters from Point Reyes to Pigeon Point 10-60 NM
Burns Harbor to Michigan City IN, Calumet Harbor IL to Gary IN, Gary to Burns Harbor IN and 3 more
Grand Marais to Taconite Harbor MN, Grand Portage to Grand Marais MN, Oak Point to Saxon Harbor WI and 1 more
5NM East of a line from Fairport MI to Rock Island Passage, Black River To Ontonagon MI, Eagle River to Manitou Island MI and 9 more
Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI, Manistee to Point Betsie MI, Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay and 4 more
North Point Light to Wind Point WI, Port Washington to North Point Light WI, Sheboygan to Port Washington WI and 1 more
Michigan City IN to New Buffalo MI, New Buffalo MI to St Joseph MI
Coastal Waters From Cape Flattery To James Island 10 To 60 Nm, Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm, Waters From James Island To Point Grenville 10 To 60 Nm
Grand Haven to Whitehall MI, Holland to Grand Haven MI, Pentwater to Manistee MI and 3 more
Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters and 11 more
Reviewed 2026-07-21. This guide is maintained by Weather Alert Watch from official sources.
Corrections and review policy