Melbourne, Florida 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

047
FXUS62 KMLB 182330
AFDMLB

Area Forecast Discussion
National Weather Service Melbourne FL
730 PM EDT Thu Jun 18 2026

...New AVIATION...

.KEY MESSAGES...
Issued at 200 PM EDT Thu Jun 18 2026

- Very hot and humid conditions continue into the weekend and next
  week. A Heat Advisory remains in effect until 7 PM this evening.
  Residents and visitors should remain well-hydrated and stay cool
  in the shade or air conditioning each day.

- Rain and storm chances increase into the weekend, bringing the
  potential of a few strong to severe storms and locally heavy
  rainfall. Minor flooding is possible in urban and low-lying
  areas.

- A moderate risk for rip currents continues at area beaches.
  Remember to swim near a lifeguard and to never enter the water
  alone!

&&

.DISCUSSION...
Issued at 215 PM EDT Thu Jun 18 2026

Now-Tonight...Heat index values were already climbing into the upper
90s and higher at lunchtime. We are well on the way to heat indices
peaking near 105-110 degrees this afternoon, thanks to south-
southwesterly flow and a delayed east coast sea breeze. A Heat
Advisory is in effect until 7 PM this evening, highlighting the
increased risk for heat-related illness. Stay well-hydrated and
limit time spent outdoors, taking frequent breaks in the shade/air
conditioning. Know the signs and symptoms of heat exhaustion and
heat stroke.

Higher convective temperatures and a lack of forcing early in the
afternoon will delay the onset of showers and storms until late
afternoon. CAMs vary a bit in overall convective
coverage/evolution, but there is general agreement with storms
peaking between 5-10 PM along the sea breeze collision. 12z HRRR
(and previous runs) have shown a slightly more organized east
coast breeze, pushing near/west of I-95, whereas other guidance
has suggested a more diffuse east coast breeze. Southwesterly
steering flow will tend to push any convection across the
peninsula in our direction through early-mid evening, dissipating
by midnight and pushing offshore. Steep low-level lapse rates and
plenty of DCAPE suggest that a couple storms could become strong,
capable of gusty to locally damaging winds and frequent lightning.
With sea breeze and outflow boundary collisions expected, a brief
funnel cloud or tornado cannot be ruled out. At the 130 PM
update, SPC included the Orlando metro, Daytona Beach, and coast
from Melbourne northward in a Marginal Risk for severe storms.
Torrential downpours are also likely with any storm, which may
lead to ponding of water on roads and in low-lying areas.

Friday-Saturday...The stretch of heat continues into the weekend,
even as increased afternoon storm chances try to provide some
relief. Remnants of what was Tropical Storm Arthur will push
toward the Carolina coast on Friday. Models show the associated H5
vorticity reflection extending southward into northeast Florida
Friday afternoon as a surface front briefly stalls over the
southeast U.S. Deep moisture (PW values 2.1"+) will be present,
along with slightly stronger WSW surface flow. While an east coast
sea breeze may develop, especially south of Cape Canaveral, it is
likely to remain pinned very near the coast or just offshore. As
a result, temperatures should have plenty of time to warm into the
90s by the early afternoon. Heat index values are once again
forecast to reach the 102-107F range, with a number of locations
eclipsing Heat Advisory criteria. Some question remains as to how
quickly showers and storms will develop Friday afternoon. Earlier
onset of convection could put a lid on the higher heat indices,
but confidence in this is low right now. Plan on another very hot
and humid day, staying hydrated and in air conditioning (or the
shade) as much as possible.

Developing storms Friday afternoon will be primarily supported by
the west coast sea breeze and previously mentioned (modest) upper
level support. The modeled environment suggests scattered coverage
of showers and lightning storms, capable of torrential rainfall,
frequent lightning, and strong to damaging wind gusts. As a result,
a Marginal Risk for severe storms exists from Brevard/Osceola
counties northward Friday afternoon and evening. There is also a
Marginal Risk for Excessive Rainfall, meaning that any one storm
could produce high rain rates and/or locally heavy rain amounts that
lead to minor flooding. Activity will largely shift offshore by
midnight, followed by mostly dry conditions into early Saturday.
Despite another hot day forecast on Saturday (heat indices 100-
107F), 12z models suggest high coverage (60-75%) of showers and
storms by the afternoon/early evening. Exact timing is uncertain,
but an earlier start to rain could bring some heat relief to
parts of the area. A couple of strong to severe storms cannot be
ruled out, but Saturday`s environment looks increasingly
favorable for heavy rain/flooding potential.

Sunday-Wednesday...In the extended forecast, rain chances trend down
into next week as high pressure settles over the eastern Gulf and FL
Peninsula. Weak mid level ridging also builds overhead through
Tuesday, with greater divergence in models solutions beyond that
point. Lower rain chances mean that temperatures trend higher
again next week. Highs are forecast to reach the low/mid 90s
Monday onward, combining with PW 1.8-2.0" to push heat index
values above 102-105F. Medium confidence exists in a Major
HeatRisk developing again next week, so keep this in mind for any
plans to be outside. Practicing heat safety (adequate cooling and
hydration) will be necessary in avoiding heat-related illness,
especially as the hot days and warm nights persist.

&&

.MARINE...
Issued at 200 PM EDT Thu Jun 18 2026

Generally favorable boating conditions persist through early next
week, with the exception being increased rain and lightning storm
chances Friday-Sunday. SSW winds 10-14 kt back to the SE each
afternoon, though the sea breeze could struggle to develop this
weekend in broad westerly flow. Scattered to numerous offshore-
moving showers and storms are forecast in the late afternoon and
evening hours, some of which could be strong to severe. Seas 1-3 ft,
higher in the vicinity of storms. Weak high pressure builds back
over the waters by Monday, supporting lower rain chances and light
SW flow backing to the ESE in the afternoon.

&&

.AVIATION...
(00Z TAFs)
Issued at 730 PM EDT Thu Jun 18 2026

Isolated showers and storms continue across east central Florida,
with TEMPOs at MCO, SFB, and TIX between 00Z and 01Z for VIS and
CIG reductions due to TSRA. Growing less confident in seeing
activity from MLB southward, so removed TEMPO from MLB and
switched VCTS to VCSH at VRB, FPR, and SUA. Activity will push
offshore overnight, with SSW winds around 5 knots persisting
overnight. Winds pick up out of the SSW around 10 knots after 13Z,
with another afternoon of showers and storms forecast across the
area. Added in VCTS after 18Z at LEE and after 19Z elsewhere.
Winds across the interior become more westerly while winds from
TIX southward become more SE at 10 to 15 knots.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  77  93  77  91 /  60  30  20  80
MCO  78  95  77  93 /  60  40  20  70
MLB  80  94  78  92 /  50  50  30  80
VRB  79  95  77  93 /  30  40  40  80
LEE  79  94  78  92 /  10  20  20  50
SFB  78  95  77  93 /  60  40  20  80
ORL  79  94  78  92 /  50  40  10  70
FPR  78  94  77  92 /  20  40  40  80

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
&&

$$

DISCUSSION...Schaper
AVIATION...Tollefsen