Sebastian Inlet to Jupiter Inlet 20-60 NM Marine Forecast
| Rest Of Tonight...Southeast Winds Around 5 Knots. Seas 1 To 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And South 1 Foot At 3 Seconds. A Chance Of Showers And Thunderstorms. |
| Tuesday...East Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: East 2 Feet At 9 Seconds And Southeast 1 Foot At 3 Seconds. A Chance Of Showers And Thunderstorms. |
| Tuesday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet, Building To 3 To 5 Feet, Occasionally To 6 Feet After Midnight. Wave Detail: Northeast 3 Feet At 5 Seconds And South 1 Foot At 3 Seconds, Becoming Northeast 4 Feet At 6 Seconds And Northwest 2 Feet At 5 Seconds After Midnight. A Chance Of Showers And Thunderstorms. |
| Wednesday...Northeast Winds 15 To 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 6 Feet At 7 Seconds And Northwest 4 Feet At 8 Seconds. A Chance Of Thunderstorms. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon. |
| Wednesday Night...East Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots After Midnight. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 6 Feet At 7 Seconds And North 5 Feet At 8 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Thursday...East Winds Around 10 Knots. Seas 5 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Northwest 4 Feet At 7 Seconds And Northeast 4 Feet At 8 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Thursday Night...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Showers With Thunderstorms Likely In The Evening, Then Showers Likely With A Chance Of Thunderstorms After Midnight. |
| Friday...East Winds Around 10 Knots. Seas 3 To 4 Feet. Showers Likely With A Chance Of Thunderstorms. |
| Friday Night...Southeast Winds 5 To 10 Knots. Seas 3 Feet. A Chance Of Thunderstorms. Showers Likely In The Evening, Then A Chance Of Showers After Midnight. |
| Saturday...East Winds Around 5 Knots. Seas 2 To 3 Feet. Showers Likely With A Chance Of Thunderstorms. |
| Saturday Night...Southeast Winds Around 5 Knots. Seas 2 Feet. A Chance Of Showers And Thunderstorms. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Melbourne FL 746pm EDT Monday September 14 2026 Issued at 257pm EDT Monday September 14 2026 Now-Tonight...A healthy field of cumulus clouds is present across east central Florida this afternoon, now highlighting the developing east coast sea breeze near I-95. Showers are forming near and west of the breeze, in an environment characterized by 2.2"+ PW (see 15z XMR sounding), 2,000-2,500 J/kg MLCAPE, weak lapse rates, and warm H5 temperatures. Like yesterday, not every location will see rain or storms this afternoon. However, the spots that do may experience torrential downpours, occasional to frequent lightning, and gusty winds. While initial convection will be focused closer to the coast through 3pm or so, a transition of rain/storms inland is expected as both the sea breeze and 500mb flow shifts more onshore. CAMs and HREF alike push most of the activity west of the area by 8- 9pm as it all begins to dissipate past sunset. Tonight, temperatures will settle into the 70s again but stay a few degrees warmer at the coast. This marks the beginning of deepening onshore flow and the influence of an expanding surface ridge to our north. Showers and isolated storms are supported in both short and medium-range guidance, and some of this activity could drift onshore after midnight (closer to daybreak Tuesday). Tuesday-Thursday...Some showers and a few storms over the local Atlantic may be moving onshore at the immediate coast Tuesday morning. East-northeasterly winds become established areawide, increasing a bit through the day, especially along the coast. This is in response to a gradually tightening pressure gradient around the southern periphery of a ridge, centered over New England. A 10- 15 mph breeze Tuesday becomes 15-20+ on Wednesday with peak gusts around 25-30 mph at times. Beach and boating conditions will become poor to hazardous, especially on Wednesday. As always, heed lifeguard advice, beach flags, and signs. Entering the surf is not advised as conditions worsen mid week. Lower rain chances continue to be advertised on Wednesday as a batch of drier air moves across north-central Florida. Despite model soundings highlighting a stout dry layer between 500-700mb, the low levels may remain moist enough to support shallow marine-layer showers that repeatedly push toward the coast. Lower chances for lightning (generally less than 30-40%) are forecast Wednesday. High PW values (Precipitable Water values) return Thursday afternoon and beyond, coincident with an upper low passing overhead. With this additional dynamic support, rain chances return to 60% and higher Thursday. Guidance is also highlighting some notable DCAPE values and H5 temps between -8C and - 10C, so the potential for a few stronger storms and locally heavy rainfall will be monitored. Friday - Sunday revious)...The mid to upper level ridge over the southeast U.S. gradually breaks down late week as troughing aloft continues to push west of Florida and into the Gulf. Southwest to south flow behind the trough aloft will advect a column of deeper moisture over central Florida. This looks to support continued rain chances areawide into the weekend. High temperatures are forecast near seasonal values mostly in the upper 80s and near 90 degrees. Marine Issued at 257pm EDT Monday September 14 2026 Light to nearly calm winds over the local waters and seas 1-2 ft maintain favorable boating conditions this afternoon and evening. Deep moisture and a shift to increasingly east-northeast flow will support a growing chance for overnight showers and a few storms, continuing into Tuesday. Deteriorating conditions are forecast from Tuesday evening onward as high pressure strengthens north of the waters. In response, northeasterly winds freshen, worsening boating conditions from north to south late Tuesday night into Wednesday morning. Sustained winds 20-25 kt with peak gusts around 30 kt are forecast, so Small Craft Advisories will be needed soon. Seas peak around 6-8 ft Wednesday into early Thursday. Rain chances will persist over the waters, perhaps lowering a bit Wednesday as some drier air moves overhead. However, moisture surges back in Thursday and Friday, supporting continued rain/storm chances. Hydrology Issued at 257am EDT Monday September 14 2026 The St Johns River at Astor may reach Action Stage this week. Locally heavy rain is expected in the middle/upper basin early this week, followed by a period of onshore winds over the lower basin and estuary from late Tuesday through at least Thursday. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...None. |
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