Volusia-Brevard County Line to Sebastian Inlet out 20 NM Marine Forecast
| Rest Of Tonight...South Winds 5 To 10 Knots, Becoming Southwest Early This Morning. Seas 2 Feet. Wave Detail: Southeast 2 Feet At 4 Seconds And East 2 Feet At 9 Seconds. Mostly Smooth On The Intracoastal Waters. |
| Sunday...West Winds Around 5 Knots, Becoming East In The Afternoon. Seas 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And Southeast 1 Foot At 3 Seconds. Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Afternoon. |
| Sunday Night...South Winds Around 5 Knots, Becoming West After Midnight. Seas 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And Southeast 1 Foot At 3 Seconds. Mostly Smooth On The Intracoastal Waters. |
| Monday...Northwest Winds Around 5 Knots, Becoming Northeast In The Afternoon. Seas 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And Southeast 1 Foot At 4 Seconds. A Light Chop On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Afternoon. |
| Monday Night...East Winds Around 5 Knots. Seas 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And Southeast 1 Foot At 4 Seconds. Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Tuesday...Northeast Winds 5 To 10 Knots, Increasing To 10 To 15 Knots In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 4 Seconds And East 2 Feet At 9 Seconds. A Moderate Chop On The Intracoastal Waters. A Chance Of Thunderstorms. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon. |
| Tuesday Night...Northeast Winds 15 To 20 Knots, Increasing To 20 To 25 Knots After Midnight. Seas 3 To 4 Feet, Building To 4 To 6 Feet, Occasionally To 8 Feet After Midnight. Rough On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Wednesday...Northeast Winds 20 To 25 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Rough On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Wednesday Night...Northeast Winds 20 To 25 Knots, Becoming East 15 To 20 Knots After Midnight. Seas 6 To 7 Feet, Occasionally To 9 Feet, Subsiding To 4 To 6 Feet, Occasionally To 8 Feet After Midnight. Rough On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Thursday...East Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Moderate Chop On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Thursday Night...East Winds 5 To 10 Knots. Seas 3 To 4 Feet. Mostly Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Melbourne FL 801pm EDT Sat September 12 2026 Issued at 231pm EDT Sat September 12 2026 Now-Sunday...Compared to this time yesterday, showers and storms are taking a little longer to develop. A fair amount of low/mid cloud cover and slower inland progression of the east coast breeze means two things: a slightly later start to storms and an afternoon sea breeze collision nearer to or just east of I-4. The 15z XMR sounding indicates anomalously high PW values (Precipitable Water values) (2.31") as well, similar to what was observed yesterday. Models are in fair agreement with the east coast breeze slowly making a trek westward this afternoon, eventually colliding with the west coast breeze near the Orlando metro after 4 PM. Any storms prior to sunset will be capable of torrential rainfall, frequent lightning, and occasionally gusty winds (40-50 mph). Light background flow and erratic storm motions may allow for instances of minor flooding (ponding on roads) to develop. When thunder roars, go indoors! Rain and storms will be on a quick downward trend after 8-9pm with the loss of daytime heating. Sunday looks to bring a lot of the same in terms of rain and storm coverage. Mid level troughing over the northeast (well north of us) slides eastward while the H5 ridge axis stays in place locally. Highs in the upper 80s to low 90s will feel more like the low 100s (heat index) as early as lunchtime on Sunday. Even with increasing clouds through the day, it will feel very muggy. A more active west- to-east push of showers and storms is possible, based on some newer runs of CAM guidance. Like today, it could take until midday or early afternoon until the east coast breeze starts to meander inland (accompanied by scattered rain/storms). Another sea breeze/outflow collision closer to the Orlando metro seems plausible as convection peaks after 3-5 PM, dissipating around sunset. At the beaches, a moderate risk of rip currents continues through the rest of the weekend. Monday - Friday odified)...An upper level trough and attendant surface front slide east over the Atlantic Monday into Tuesday as high pressure builds over the Great Lakes/Northeast. The influence of the high pressure center expands Tuesday and Wednesday, resulting in a tighter pressure gradient along its southern flank. This alone will increase onshore (ENE) winds locally by the middle of the week. Latest ensemble probabilities for 30+ mph gusts indicate a gusty day along the immediate coast Tuesday, followed by gustier winds spilling inland on Wednesday (EPS 40-50%+ and NBM 60-80%+ prob. of 30+ mph gusts). Beyond mid week, greater uncertainty exists within the synoptic pattern. As an H5 trough continues to move offshore, a broadened area of low pressure rounds the eastern side of the mid- level ridge anchored over the southeast U.S. A number of deterministic models show this area becoming a closed low while ensemble guidance maintains more of a broad open wave over the southwest Atlantic. The area of low pressure continues to round the decaying ridge over the southeast U.S. late in the week, passing over Florida and into the Gulf Thursday into Friday. Deep moisture generally persists through the extended forecast, continuing a period of near to above seasonal rain chances. Slightly above normal temperatures are forecast Monday and Tuesday as highs reach the low 90s (mid 90s in a few spots Monday). Increasing onshore flow should then help bring nearer-to-normal temperatures, with highs ranging the upper 80s by Wednesday. Marine Issued at 231pm EDT Sat September 12 2026 Now-Monday...Mainly favorable boating conditions will last into early next week as high pressure maintains light winds. The east coast breeze will turn winds onshore each afternoon, then returning southwesterly overnight. Scattered showers and storms are in the forecast each day, particularly closer to the coast. At night, some activity may develop farther offshore in the Gulf Stream. 2-3 ft seas, except locally higher near storms. Tuesday-Thursday (modified)...Poor to hazardous boating conditions build into mid week as a cold front moves offshore the northeast U.S. Onshore winds increasing 10-20 kts Tuesday increase further to 20-25 kts into Wednesday (especially north of Sebastian Inlet). Seas 2-4 ft on Tuesday build 6-8 ft Tuesday night into Wednesday. Winds begin to subside Wednesday night, becoming 10-15 kts Thursday. Similarly, seas subside to 4-6 ft Thursday. Increased onshore flow should support high coverage of showers and storms over the waters through the period. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...None. |
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