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: 8:14 pm EDT Jul 25, 2025 |
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Tonight
 Mostly Clear
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Saturday
 Sunny
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Saturday Night
 Mostly Clear
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Sunday
 Sunny
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Sunday Night
 Mostly Clear
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Monday
 Sunny
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Monday Night
 Mostly Clear
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Tuesday
 Chance T-storms
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Tuesday Night
 Chance T-storms then Mostly Clear
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Lo 74 °F |
Hi 92 °F |
Lo 73 °F |
Hi 92 °F |
Lo 74 °F |
Hi 94 °F |
Lo 74 °F |
Hi 94 °F |
Lo 76 °F |
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Tonight
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Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm. |
Saturday
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Sunny, with a high near 92. Calm wind becoming east northeast around 5 mph in the afternoon. |
Saturday Night
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Mostly clear, with a low around 73. East wind around 5 mph becoming calm. |
Sunday
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Sunny, with a high near 92. Light and variable wind becoming east northeast 5 to 10 mph in the afternoon. |
Sunday Night
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Mostly clear, with a low around 74. East wind around 5 mph becoming calm. |
Monday
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Sunny, with a high near 94. Calm wind becoming east around 5 mph in the afternoon. |
Monday Night
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Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm in the evening. |
Tuesday
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A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 94. Calm wind becoming east southeast around 5 mph in the afternoon. |
Tuesday 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. |
Wednesday
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A 50 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 94. South southwest wind around 5 mph becoming southeast in the afternoon. |
Wednesday 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. |
Thursday
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A 50 percent chance of showers and thunderstorms. Sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the morning. |
Thursday Night
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A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening. |
Friday
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Showers and thunderstorms likely. Sunny, with a high near 93. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%. |
Forecast from NOAA-NWS
for Port St. Lucie FL.
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Weather Forecast Discussion
054
FXUS62 KMLB 252335
AFDMLB
Area Forecast Discussion
National Weather Service Melbourne FL
735 PM EDT Fri Jul 25 2025
...New AVIATION...
.KEY MESSAGES...
Issued at 253 PM EDT Fri Jul 25 2025
- A strong high pressure ridge will persist into next week,
lowering rain chances and increasing temperatures and heat
indices.
- Dangerous, long-lasting heat is forecast this weekend into
early next week.
- A Heat Advisory is in effect for Lake, Volusia, Seminole, and
Orange counties on Saturday from 11am-7pm.
&&
.PREVIOUS DISCUSSION...
Issued at 253 PM EDT Fri Jul 25 2025
Current-Tonight... Isolated to scattered showers have developed near
I-4 early this afternoon. Activity is forecast to lift northwest
through the remainder of the day with peak coverage (~40%) occurring
across and near Lake county as the west coast sea breeze approaches.
Dry air building above 700mb has kept activity shallow with only
isolated lightning strikes observed so far today. Lingering showers
will be possible around Lake county through 10pm with dry conditions
forecast overnight. Muggy and mild conditions hold tonight with lows
mostly in the low to mid 70s.
Saturday-Monday... Strong mid-level high pressure continues to
build over the southeast U.S. Associated subsidence and
compressional warming will promote a period of dangerous heat
locally, and this heat wave looks to be the most significant so
far this summer. High temperatures warm a few degrees each day,
widely ranging the mid to upper 90s across the north interior with
low to mid 90s elsewhere. Monday remains forecast as the hottest
day though the period with highs forecast just below 100F near,
north, and west of I-4. Above normal temperatures combined with
humidity will produce peak heat index values up to 110F across the
I-4 urban corridor this weekend, ranging 105-109F further south.
An increase in moisture early next week will further produce heat
index values near 112F north and west of I-4 on Monday. While the
most significant heat impacts will occur during the afternoon,
expect only gradual relief through the evening with temperatures
slow to fall through the 80s, especially near urban centers. Due
to prolonged periods of daily heat, a Major to Extreme HeatRisk is
forecast near and north of I-4, particularly on Monday. Low
temperatures range the mid to upper 70s across the north with low
to mid 70s across the south.
A Heat Advisory is in effect for Lake, Volusia, Seminole, and Orange
counties from 11am-7pm Saturday. Additional Heat Advisories will
likely be needed for portions of east central Florida late this
weekend and into early next week with near Extreme Heat conditions
possible. Residents and visitors are encouraged to follow the
forecast and plan to take the proper heat safety actions to prevent
heat stress and know the signs of heat exhaustion and heat stroke.
Stay cool, stay hydrated, stay informed.
A drier airmass will keep rain chances low with a 10% chance along
the coast each day and a 20-30% chance west of I-95. Winds often
become light and variable through the weekend in vicinity of surface
ridging. A weak sea breeze will shift winds onshore around 5-10 mph.
Tuesday-Thursday... A mid-level shortwave digs across the western
Atlantic, nudging high pressure westward. Moisture begins to rebuild
as a weak surface trough sinks across the southeast U.S. and
adjacent Atlantic waters. However, surface ridging becomes
reinforced locally as a nose of high pressure extends across south
Florida. Dangerous heat continues Tuesday with temperatures and
heat index values finally beginning to decline mid next week.
Highs on Tuesday climb again into the mid to upper 90s across the
interior, ranging the low to mid 90s closer to the coast, and the
increased moisture should push Heat Index values toward Heat
Advisory criteria for at least northern portions of east central
Florida. While still hot, temperatures noticeably decrease
Wednesday and Thursday with highs mostly in the low to mid 90s.
Increasing rain chances (40-60%) will bring some relief from the
heat, particularly from Wednesday onward.
&&
.MARINE...
Issued at 352 AM EDT Fri Jul 25 2025
High pressure centered over the southwest Atlc will push westward
across the FL peninsula and into the Gulf this weekend,
maintaining favorable boating conditions. SE winds 10 knots today
should become light and variable this weekend with a weak sea
breeze near the coast. A weak, reinforcing ridge axis will nose
westward across south Florida early next week. Seas 2-3 ft today,
diminishing to 1-2 ft through Monday.
&&
.AVIATION...
(00Z TAFs)
Issued at 731 PM EDT Fri Jul 25 2025
VFR conditions through the TAF period. Light and variable winds
with clear skies overnight. Winds will then become E/ESE and
increase to 5-8 KT by mid morning before becoming light once again
Saturday night. Models indicate a few isolated showers may be
possible across the interior on Saturday afternoon, especially at
LEE, but confidence is too low to include VC wording at this
time.
&&
.PRELIMINARY POINT TEMPS/POPS...
DAB 76 92 76 93 / 0 10 0 10
MCO 75 97 76 97 / 10 10 0 20
MLB 76 92 76 92 / 0 0 0 10
VRB 72 92 72 92 / 0 0 0 10
LEE 76 95 78 96 / 30 20 0 20
SFB 76 96 77 97 / 10 10 0 20
ORL 76 97 78 97 / 10 10 0 20
FPR 71 92 71 92 / 0 0 0 10
&&
.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory from 11 AM to 7 PM EDT Saturday for FLZ041-044>046-
141-144.
AM...None.
&&
$$
DISCUSSION...Law
AVIATION...Watson
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