Sebastian Inlet to Jupiter Inlet out 20nm Marine Forecast
| Rest Of Tonight...Southwest Winds Around 5 Knots, Becoming West Early This Morning. Seas 1 To 2 Feet. Wave Detail: East 1 Foot At 3 Seconds And Northeast 1 Foot At 9 Seconds. Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms This Evening, Then A Slight Chance Of Showers And Thunderstorms. |
| Tuesday...Southwest Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 1 To 2 Feet. Wave Detail: East 1 Foot At 3 Seconds And Northeast 1 Foot At 11 Seconds. Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Morning, Then A Chance Of Showers And Thunderstorms In The Afternoon. |
| Tuesday Night...Southeast Winds Around 5 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 9 Seconds And Southeast 1 Foot At 4 Seconds. Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms. |
| Wednesday...Southeast Winds 5 To 10 Knots. Seas 3 To 4 Feet. Wave Detail: Northeast 3 Feet At 9 Seconds And Southeast 2 Feet At 4 Seconds. A Light Chop On The Intracoastal Waters. A Chance Of Showers. A Slight Chance Of Thunderstorms In The Morning, Then A Chance Of Thunderstorms In The Afternoon. |
| Wednesday Night...Southeast Winds 5 To 10 Knots. Seas 3 To 4 Feet. Wave Detail: Northeast 3 Feet At 9 Seconds And Southeast 2 Feet At 4 Seconds. Mostly Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms. |
| Thursday...Southeast Winds Around 5 Knots. Seas 3 To 4 Feet. Wave Detail: Northeast 3 Feet At 8 Seconds And Southeast 2 Feet At 4 Seconds. Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Morning, Then A Chance Of Showers And Thunderstorms In The Afternoon. |
| Thursday Night...South Winds Around 5 Knots. Seas 2 To 3 Feet. Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms. |
| Friday...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Light Chop On The Intracoastal Waters. A Chance Of Showers And Thunderstorms In The Morning, Then Showers And Thunderstorms Likely In The Afternoon. |
| Friday Night...South Winds Around 5 Knots. Seas 1 To 2 Feet. Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms In The Evening, Then A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Saturday...South Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 1 To 2 Feet. A Light Chop On The Intracoastal Waters. A Chance Of Showers And Thunderstorms In The Morning, Then Showers And Thunderstorms Likely In The Afternoon. |
| Saturday Night...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Mostly Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Melbourne FL 120am EDT Tuesday September 8 2026 Issued at 255pm EDT Monday September 7 2026 Today - Tonight Upper level high pressure will remain in place across the Great Plains as an upper level trough continues to push farther offshore from the NE US coast with its axis sliding down the Florida peninsula into central Florida. Short wave energy aloft will continue to traverse across the Florida peninsula through the day, aiding convection this afternoon and early evening. At the surface, high pressure is surpressed to our south and east and a weak frontal boundary is situated across north Florida and is very slowly shifting southward. This frontal boundary may push into north/central Florida tonight, but confidence remains low. Locally, light westerly winds will shift onshore in the afternoon with the formation of the east coast sea breeze and push inland. The sea breeze has already formed this afternoon, mainly from Cape Canaveral southward. The sea breeze collision is forecast to occur along the I- 95 corridor this afternoon/early evening. Storm motion will be light and north to northwesterly around 10 mph, which will bring activity back towards the coast and out into the Atlantic. An earlier start to convection today, as scattered showers and storms formed across the west coast of Florida and moved into east central Florida through late morning. Additional storms have moved into east central Florida and are currently heading toward the eastern Coast, mainly from Cape Canaveral southward, with trailing storms around Lake Okeechobee area. Scattered to numerous showers and storms are forecast to form this afternoon (PoP 70-80%). Highest coverage will be along the I-95 corridor this afternoon into early evening. An earlier start to convection today, with scattered showers and storms moving across east central Florida, mainly Kissimmee to Melbourne northward, late this morning through early this afternoon. Forecast soundings show a moist profile, although not as moist as it has been the past couple of days, with PW values (Precipitable Water values) of 2.0-2.3". The environment supports convection, with plenty of instability (MUCAPE of 1800-2200 J/kg), adequate buoyancy (lifted index of -5 to -6), and sufficient downdraft potential (DCAPE 500- 800 J/kg). Temperatures aloft are slightly warmer than they were yesterday (-6 to -6.5C at 500 mb). Because of this, main storm hazards will be frequent lightning, gusty winds of 40-50 mph, and torrential downpours capable of 2-4" in a relatively short period of time, promoting minor/nuisance flooding in urban and poor drainage areas. The Weather Prediction Center (WPC) has a Marginal (level 1 of 4) Risk for excessive rainfall for all of east central Florida today. Seasonable and humid today, with afternoon highs in the upper 80s to low 90s. These temperatures combined with high humidity will produce peak heat indices of 100-107F. Warm and muggy conditions will continue overnight, with lows in the low to mid 70s. Tuesday-Sunday... Upper level high pressure across the Great Plains will shift eastward through mid week as the trough off the eastern US coast shifts farther eastward, with the trough axis remaining over the central Florida through Tuesday. At the surface, a weak frontal boundary across north Florida may push farther southward into north-central to central Florida Tuesday before washing out. Mostly diurnal convection through the period with fairly high rain chances through the period, 40-70% Tuesday, and 60-70% Wednesday- Sunday. Storm motion will be fairly weak and erratic, however some activity will periodically push back towards the coast, especially with stronger boundary collisions. Storm impacts will be similar to today, with locally heavy rainfall continuing to be a concern. Seasonable temperatures and humid conditions are forecast each day, with highs in the upper 80s to low 90s and heat indices of 100-107. Warm and muggy conditions will continue overnight, with lows in the low to mid 70s. Marine Issued at 255pm EDT Monday September 7 2026 Today-Friday... Generally favorable boating conditions through the period. Surface high pressure has been pushed south/east of the local waters leaving a fairly weak pgradient in place. A weak frontal boundary will move into north FL early today and continue to settle further south tonight/Tuesday toward/into central FL. Westerly flow today will become S/SE at 10-12 KT this afternoon as the east coast sea breeze forms. With the advancing boundary, winds tonight will shift offshore south of the Cape and more N/NE northward thru the night. On Tuesday, winds will shift south to southeast with speeds increasing at 10-12 kts with the sea breeze development each afternoon through the period. Expect earlier initiation of storms developing over land and pushing off of the coast today with initial isolated to scattered storms becoming locally numerous to widespread. Diurnal offshore- moving showers/storms through mid- late week. A few strong storms possible with primary impacts of frequent lightning, gusty winds in excessive of 34 KT or greater, and heavy downpours. Coverage of storms will be fairly high early to mid week. Seas locally higher in the vicinity of storms. Seas 1-2 ft thru tonight, building to 2-4 ft again by Tuesday afternoon. Seas continue 3-4 ft on Wednesday, possibly 5 ft across the Volusia waters into Wednesday evening gradually subsiding to 2-3ft Wednesday night-Friday. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...None. |
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