Volusia-Brevard County Line to Sebastian Inlet out 20 NM Marine Forecast
| Tonight...South Winds 5 To 10 Knots, Becoming Southwest After Midnight. Seas 2 Feet. Wave Detail: Southeast 1 Foot At 4 Seconds And East 1 Foot At 8 Seconds. Mostly Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms This Evening. |
| Monday...Southwest Winds Around 5 Knots, Becoming Southeast 10 To 15 Knots In The Afternoon. Seas 1 To 2 Feet. Wave Detail: Southeast 2 Feet At 4 Seconds And East 1 Foot At 8 Seconds. A Moderate Chop On The Intracoastal Waters. |
| Monday Night...South Winds 10 To 15 Knots, Becoming Southwest 5 To 10 Knots After Midnight. Seas 2 Feet. Wave Detail: Southeast 2 Feet At 3 Seconds And East 1 Foot At 8 Seconds. A Light Chop On The Intracoastal Waters. |
| Tuesday...South Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 1 To 2 Feet. Wave Detail: Southeast 1 Foot At 4 Seconds And East 1 Foot At 8 Seconds. A Light Chop On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Afternoon. |
| Tuesday Night...South Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: Southeast 2 Feet At 3 Seconds And East 1 Foot At 10 Seconds. Mostly Smooth On The Intracoastal Waters. A Chance Of Showers And Thunderstorms In The Evening. |
| Wednesday...South Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 1 To 2 Feet. Wave Detail: Southeast 1 Foot At 3 Seconds And East 1 Foot At 10 Seconds. A Light Chop On The Intracoastal Waters. A Chance Of Showers And Thunderstorms In The Afternoon. |
| Wednesday Night...South Winds 5 To 10 Knots. Seas 1 To 2 Feet. Mostly Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms. |
| Thursday...South Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Light Chop 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 5 To 10 Knots. Seas 2 Feet. Mostly Smooth On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Evening. |
| Friday...South Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 2 Feet. A Light Chop On The Intracoastal Waters. A Slight Chance Of Showers And Thunderstorms In The Afternoon. |
| Friday Night...Southeast Winds 5 To 10 Knots. Seas 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 230pm EDT Sunday August 23 2026 ...New KEY MESSAGES,ARINE... .KEY MESSAGES... Issued at 230pm EDT Sunday August 23 2026 - Scattered to numerous showers and lightning storms are forecast this afternoon and evening, highest near and north of the I-4 corridor. Storm hazards include frequent lightning strikes, wind gusts up to 55 mph, and quick rainfall accumulations of 1-3" locally. - Below normal rain and storm chances start off the work-week as high pressure lifts northward across the Florida peninsula, with a return of near normal rain and storm chances from Wednesday onward as moisture increases. - Near to slightly above normal temperatures persist this week, but humidity will still produce peak heat indices of 100F and greater. Adequate hydration and breaks in the shade or A/C will be important for those spending extended periods of time outdoors! Issued at 230pm EDT Sunday August 23 2026 Current - Tonight Temperatures max out in the L90s (few M90s) this afternoon with peak heat indices continuing above 100F, but remaining below Heat Advisory criteria. Residents and visitors are strongly encouraged to practice heat safety to avoid developing heat illness. Mid-level troughing across central FL will aid SCT-NMRS (40- 60%) diurnal shower/lightning storm development this afternoon and evening. Highest chances across the I-4 corridor where moisture is deepest. WRLY flow will only permit ECSB development from near the Cape southward and this feature may enhance pulse strong storms across the Space & Treasure coasts later. Drier air aloft may support local strong wind gusts in a few storms with other storm impacts remaining frequent lightning strikes, and torrential downpours leading to quick 1-3" rainfall totals for some. Minor/nuisance flooding possible locally. Storm motion is light westerly but could see occasional erratic storm movement from stronger boundary collisions. Activity will wind down through the mid-late evening across land with cloud-cover thinning overnight. Min temperatures fall into the M70s. Mon-Tue...Upper-level troughing across the eastern CONUS slowly lifts north/east, though weak troughing in the mid-levels will still provide daily enhancement to diurnal (albeit below normal) shower and lightning storm chances across ECFL. At the surface, weak surface ridging lifts north back into the central FL peninsula as the pgradient remains fairly weak. This will result in light southerly flow, allowing for earlier development and further inland movement of the ECSB than recent days. Precip chances will range b/n 20-40% on Monday and 30-50% Tue. Storm hazards continue to be frequent lightning strikes, wind gusts 45-55 mph locally, and heavy downpours. Weak storm steering flow will lead to slow and erratic storm motion, which may increase the potential for minor, localized flooding. Some storm activity may still push offshore through the late evening hours with mostly dry conditions across land overnight. Additional showers/storms possible overnight across the local Atlantic waters. Temperatures are forecast to remain slightly above normal each afternoon, with highs near and north of the I-4 corridor reaching the M90s and L90s most everywhere else. Peak heat indices are forecast to range between 102F to 107F, generally just below Heat Advisory criteria. Those spending extended periods of time outdoors will need to remain adequately hydrated and take breaks in the shade or A/C to prevent heat-related illness. Low temps continue in the M70s. Wed-Sun...Previous Extended Forecast Discussion Modified...Broad mid- level ridging across the Atlantic will extend towards and gradually across the Florida peninsula from the middle of this week into the weekend. The surface ridge axis is forecast to stay draped across the Florida peninsula, with light southerly winds prevailing through Fri, becoming more southeasterly next weekend as the ridge axis lifts slightly northward. Daily development of the east coast sea breeze is anticipated, and when combined with the moist air mass in place, will support a near normal/slightly above normal (40-70%) diurnal pattern of shower and storm development each day. Primary storm impacts remain lightning strikes, gusty winds, and heavy downpours leading to occasional minor/nuisance flooding. General model trends favor activity diminishing into the late evening and overnight hours. Temperatures will remain near normal in the L90s during the afternoon hours, falling into the M70s during the overnight hours. Peak heat indices are anticipated to remain below advisory criteria but will still exceed 100F, so heat safety will continue to be important through the remainder of the week. Marine Issued at 230pm EDT Sunday August 23 2026 Previous Marine Discussion Modified...Generally favorable boating conditions persist across the local waters through this week. The Atlantic surface high lifts north across the waters starting Mon, causing the southwesterly winds to become more southerly. Light offshore winds 5 to 10 knots during the overnight and morning hours increase to 10 to 15 knots and shift to out of the southeast during the afternoon as the east coast sea breeze develops each day. Seas remain generally between 1 to 3 ft, with the highest seas focused across the offshore waters. Isolated to scattered shower and lightning storm development will be forecast, with activity generally moving offshore from the peninsula each afternoon into the evening hours. Continued shower/storm development overnight across the Gulf Stream waters will be possible. Storm hazards will include frequent cloud-to-water lightning strikes, wind gusts in excess of 30 kts, heavy downpours, and locally higher seas. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...None. |
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