Port St. Lucie, Florida 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Port St. Lucie FL
National Weather Service Forecast for:
Port St. Lucie FL
Issued by: National Weather Service Melbourne, FL |
Updated: 12:14 am EDT Jul 28, 2025 |
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Overnight
 Partly Cloudy
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Monday
 Sunny
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Monday Night
 Mostly Clear
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Tuesday
 Sunny then Slight Chance T-storms
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Tuesday Night
 Slight Chance T-storms then Mostly Clear
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Wednesday
 Chance T-storms
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Wednesday Night
 Chance T-storms then Mostly Clear
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Thursday
 Chance T-storms
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Thursday Night
 Chance T-storms then Mostly Clear
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Lo 75 °F |
Hi 92 °F |
Lo 75 °F |
Hi 94 °F |
Lo 75 °F |
Hi 95 °F |
Lo 76 °F |
Hi 94 °F |
Lo 76 °F |
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Overnight
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Partly cloudy, with a low around 75. Calm wind. |
Monday
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Sunny, with a high near 92. Heat index values as high as 102. Light and variable wind becoming east 5 to 10 mph in the afternoon. |
Monday Night
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Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening. |
Tuesday
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A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 94. Heat index values as high as 106. Calm wind becoming east southeast around 5 mph in the afternoon. |
Tuesday Night
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A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening. |
Wednesday
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A slight chance of showers, then a chance of showers and thunderstorms after 11am. Sunny and hot, with a high near 95. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%. |
Wednesday Night
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A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening. |
Thursday
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A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the afternoon. |
Thursday Night
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A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening. |
Friday
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A 40 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon. |
Friday Night
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A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening. |
Saturday
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A 40 percent chance of showers and thunderstorms. Sunny, with a high near 93. Light and variable wind becoming east southeast 5 to 10 mph in the afternoon. |
Saturday Night
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A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening. |
Sunday
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A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming east around 5 mph in the afternoon. |
Forecast from NOAA-NWS
for Port St. Lucie FL.
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Weather Forecast Discussion
784
FXUS62 KMLB 272254
AFDMLB
Area Forecast Discussion
National Weather Service Melbourne FL
654 PM EDT Sun Jul 27 2025
...New AVIATION...
.KEY MESSAGES...
Issued at 205 PM EDT Sun Jul 27 2025
- Heat Advisory conditions for much of east central Florida for
most of this week. Near Extreme Heat conditions possible Monday
and Tuesday.
- Residents and visitors are encouraged to take proper heat safety
actions to prevent heat illness and know the signs of heat
exhaustion and heat stroke. Stay cool, stay hydrated, stay
informed.
- Below normal shower and storm chances continue Monday, then
return to near-normal mid to late week.
&&
.PREVIOUS DISCUSSION...
Issued at 205 PM EDT Sun Jul 27 2025
Rest of Today-Tonight...Hot conditions occurring once again across
the area this afternoon. Heat indices 108 to 110 have already been
observed across portions of east central Florida. The east coast
sea breeze is slowly working its way inland per visible satellite
imagery. However, wind speeds less than 15 mph are doing little to
provide any relief, with heat indices still around 100-105 behind
it. Leesburg has already reached 98 degrees, which break the
previous record high of 97, set in 1998. The ridge, centered near
Biloxi as of around 2 PM (and also visible on satellite) will
continue to limit shower and storm coverage this afternoon, with
an inversion and much drier air above 850mb. Although, a few
showers or possibly a storm cannot be ruled out west of Orlando
into late afternoon. Thus, have maintained PoPs around 20% in this
area. Dry conditions will prevail by the late evening hours, with
overnight lows remaining in the mid to upper 70s.
Monday-Tuesday...The ridge is forecast to drift into the Ark-La-
Tex region early this week, where it will weaken. Meanwhile, the
Atlantic ridge axis begins to build westward towards south
Florida. Below normal shower and storm chances will continue
through Monday. Then, the beginning of modest moisture return in
the mid- levels will allow for nearer to normal PoPs to return
Tuesday (30-50%). However, lingering drier air aloft could lead to
a few strong storms, with DCAPE values forecast to around
1000-1200 J/kg, should storms be able to develop. Prevailing
southerly flow at the surface will allow for a sea breeze
collision over the interior in the late afternoon. Winds behind
the sea breeze remaining under 15 mph.
Increasing moisture will only make already hot conditions even
more miserable. The hottest days of the week are forecast to be
Monday and Tuesday, with overall limited PoPs providing little
relief. Record to near-record high temperatures in the upper 90s
to near 100 are forecast for inland areas, especially along and
north of I-4. Elsewhere, along the coast, high temperatures are
forecast in the lower to mid-90s. Peak heat indices will be of
particular concern, reaching advisory (108-112) criteria for much
of the area. Another Heat Advisory has been issued for all but the
Treasure Coast from Noon to 7 PM Monday. Then, near extreme heat
conditions (heat indices 113+) are forecast north and west of I-4
Tuesday. Have held off on an Extreme Heat Watch for now due to
some uncertainty given the time frame, though this may change with
subsequent forecast cycles. Regardless, it looks like a Heat
Advisory will be needed for most, if not all, of the forecast area
Tuesday. Residents and visitors are urged to take extra
precautions when outside. Drink plenty of fluids, stay in an air-
conditioned room, and stay out of the sun. Try to limit strenuous
activities to early morning or evening.
Wednesday-Sunday...The Atlantic ridge axis builds into south-
central Florida into late week, with a mid and upper level ridge
aloft. PWATs are forecast to increase to 1.7-2" into next weekend.
Combined with light, prevailing southwesterly flow allowing for a
sea breeze collision over the central/eastern portion of the
peninsula, this will allow for PoPs to return to normal (30-60%).
Hot conditions, with highs in the 90s will continue, made to feel
even hotter by the high humidity. However, increased
precipitation coverage is forecast to moderate peak heat indices
somewhat compared to Tuesday. Regardless, heat indices near or
reaching Heat Advisory criteria (108-112) are forecast each day
through at least Friday, making for quite the stretch of
unusually hot conditions, even for a Florida summer.
&&
.MARINE...
Issued at 205 PM EDT Sun Jul 27 2025
Hot, but generally favorable boating conditions this week, as
high pressure continues to influence the local pattern. Below
normal shower and storm chances continue Monday, before nearer to
normal coverage returns mid to late week. However, prevailing
onshore steering flow will work to limit offshore- moving showers
and storms. Light overnight and early morning flow through Monday will
become generally south to southwesterly into late week. Regardless,
winds are forecast to become east to southeast each afternoon, as
the sea breeze develops. Winds remaining under 15 kts through the
period. Seas 1-2 ft.
&&
.AVIATION...
(00Z TAFs)
Issued at 654 PM EDT Sun Jul 27 2025
About as fair as the TAFs can get around here in late July.
Convection continues to be stymied by deep high pressure.
Light/VRB winds becoming E in the afternoon, up to 10 KT esp near
the coast. Low (20%) chance for shower/storm at LEE Monday
afternoon, and low-medium (30-40%) potential for another round of
fog/haze at VRB/FPR before daybreak.
&&
.PRELIMINARY POINT TEMPS/POPS...
DAB 77 95 77 95 / 0 10 0 30
MCO 78 100 77 99 / 0 20 10 40
MLB 78 93 77 93 / 0 10 0 20
VRB 74 93 74 93 / 0 10 0 20
LEE 79 98 79 97 / 0 20 10 50
SFB 78 99 78 98 / 0 10 0 40
ORL 79 100 78 99 / 0 20 10 40
FPR 73 92 73 93 / 0 10 0 20
&&
.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 7 PM EDT this evening for FLZ041-044>046-053-
058-141-144-247-347-447-547-647-747.
Heat Advisory from noon to 7 PM EDT Monday for FLZ041-044>046-
053-058-141-144-247-347-447-547-647-747.
AM...None.
&&
$$
DISCUSSION...Leahy
AVIATION...Heil
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