Sebastian Inlet to Jupiter Inlet out 20nm Marine Forecast
| Today...Southeast Winds Around 5 Knots, Becoming Northeast Late This Morning And Afternoon. Seas 1 To 2 Feet. Wave Detail: East 2 Feet At 3 Seconds And Northeast 2 Feet At 9 Seconds. A Light Chop On The Intracoastal Waters. A Chance Of Thunderstorms. Showers Likely This Morning, Then A Chance Of Showers This Afternoon. |
| Tonight...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 3 Feet At 6 Seconds And East 2 Feet At 3 Seconds. A Light Chop On The Intracoastal Waters. A Chance Of Thunderstorms. A Chance Of Showers In The Evening, Then Showers Likely After Midnight. |
| Wednesday...Northeast Winds 10 To 15 Knots, Increasing To 15 To 20 Knots In The Afternoon. Seas 3 To 4 Feet, Building To 4 To 7 Feet, Occasionally To 8 Feet In The Afternoon. Wave Detail: Northeast 4 Feet At 8 Seconds, Becoming Northeast 6 Feet At 8 Seconds In The Afternoon. Choppy On The Intracoastal Waters. A Chance Of Thunderstorms. Showers. |
| Wednesday Night...Northeast Winds 15 To 20 Knots, Becoming East 10 To 15 Knots After Midnight. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 6 Feet At 8 Seconds. Choppy On The Intracoastal Waters. A Chance Of Thunderstorms. Showers. |
| Thursday...Northeast Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 5 Feet At 8 Seconds. A Moderate Chop On The Intracoastal Waters. A Chance Of Thunderstorms. Showers. |
| Thursday Night...East Winds 10 To 15 Knots, Diminishing To 5 To 10 Knots After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Northeast 4 Feet At 8 Seconds And Southeast 2 Feet At 4 Seconds. A Light Chop On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Friday...East Winds 5 To 10 Knots. Seas 3 To 4 Feet. A Light Chop On The Intracoastal Waters. Showers Likely With A Chance Of Thunderstorms. |
| Friday Night...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Mostly Smooth On The Intracoastal Waters. A Chance Of Thunderstorms. Showers Likely In The Evening, Then A Chance Of Showers After Midnight. |
| Saturday...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Light Chop On The Intracoastal Waters. Showers Likely. A Chance Of Thunderstorms In The Morning, Then Thunderstorms Likely In The Afternoon. |
| Saturday Night...Southeast Winds Around 5 Knots. Seas 2 Feet. 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 724am EDT Tuesday September 15 2026 Issued at 257am EDT Tuesday September 15 2026 Today - Tonight A surface front extending over the western Atlantic and through portions of the southeast U.S. early today is pushed further east-southeastward as high pressure expands along the eastern seaboard. Deep moisture persists across central Florida, south of the surface boundary. East-northeast onshore winds begin to increase 10-15 mph this afternoon as the local pressure gradient begins to tighten. Showers and storms over the local Atlantic early in the day should occasionally push onshore. A diffuse sea breeze looks to develop late morning and the into early afternoon bringing the greatest chances (50-60%) for showers and storms inland, west of I-95, after 12PM. Inland activity diminishes into early evening, while isolated to scattered rounds of showers and storms should continue along the coast through the overnight. Poor lapse rates should generally limit organized stronger storms today. However, increasing background flow and winds aloft could still allow for developing convection to produce wind gusts 40-50 mph. Otherwise, hazards remain occasional to frequent lightning strikes and locally heavy downpours. Afternoon temperatures will be seasonal around the upper 80s and low 90s, but humid conditions will still produce peak heat index values in the low triple digits (100-107F). Overnight low temperatures will mostly range the mid to upper 70s, remaining warmest along the coast. Wednesday-Thursday... Continued tightening of the local pressure gradient will further increase onshore flow to around 15-20+ mph Wednesday with peak gusts 25-30 mph at times. This will prompt a period of poor to hazardous beach and boating conditions, and a high risk of life threatening rip currents along with rough surf is expected at all local beaches. East-northeast winds diminish to 10-15 mph Thursday, remaining breezy, and a high risk of rip currents is expected to continue. Heed the advice of lifeguards, beach patrol flags, and signs. Entering the surf is not advised! A drier airmass advects across central Florida on Wednesday with a tight moisture gradient extended southward through Lake Okeechobee. The Probability of Precipitation forecast mostly reflects this showing lower rain chances north of the Orlando Metro within the area of driest air. However, moistening of the lower levels within increased onshore flow should still allow for slight rain chances along the Volusia and northern Brevard Coast, and can't rule out a few of these showers sneaking further inland. Otherwise, deeper moisture south should allow for rounds of scattered to numerous showers and a few storms throughout the day, continuing along the coast into Wednesday night. Some slight adjustments have been made to the forecast into Thursday as a mid to upper level trough over the western Atlantic approaches Florida. Of note, some model guidance has slowed the westward progression of this feature. These slower solutions hold onto the drier airmass across portions of north-central Florida longer than some of the previous forecast cycles. Therefore, rain chances Thursday may look more similar to what is forecast Wednesday favoring continued rounds of scattered to numerous showers and a few storms across the south with lower rain chances north, especially northwest of I-4. High temperatures are forecast near normal Wednesday and Thursday, mostly reaching the upper 80s and near 90s degrees. Morning lows in the 70s will be highest along the coast. Areas along the Barrier Islands may struggle to fall below the 80 degree mark each morning. Friday-Monday... An unsettled pattern is forecast late week and into early next week as the mid to upper level trough passes over Florida and into the Gulf. Moisture recovers behind the trough, expanding moderate to high rain chances more areawide. Light easterly winds veer southeast to south late in the weekend, becoming locally enhanced onshore as a weak sea breeze develops each day. Afternoon temperatures continue to hold near normal in the upper 80s and close to 90s degrees. Marine Issued at 257am EDT Tuesday September 15 2026 Poor to hazardous boating conditions begin build late this afternoon through mid week as high pressure expands across the eastern U.S. Light onshore winds early today increase 15-20 kts north of the Cape into the evening as the local pressure gradient begins to tighten. Small Craft Advisories go into effect late this evening and overnight for the Volusia and Brevard waters as east-northeast winds further increase 20-25 kts. Winds 15-20 kts spread south of the Sebastian Inlet late Wednesday morning and into the afternoon. Seas begin to build 6-8 ft across the northern Volusia waters after midnight Wednesday, spreading southward through the Treasure Coast early Wednesday afternoon and prompting the Small Craft Advisory to be expanded into the Treasure Coast waters. Winds and seas show a diminishing trend early Thursday, and favorable boating conditions return to the local Atlantic waters Friday. A generally wet pattern begins today and is forecast through late week as a mid to upper level low approaches and passes west of the local Atlantic waters. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...Small Craft Advisory from 11pm this evening to 5am EDT Thursday for AMZ550-570. Small Craft Advisory from 2am Wednesday to 5am EDT Thursday for AMZ552-572. Small Craft Advisory from 2pm Wednesday to 5am EDT Thursday for AMZ555-575. |
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