Monthly outlook for Tropic Isle, FL: average high 89.6°, average low 82.1°. That is 1.4° above the climate normal for August. Precipitation is expected on 8 days (about 3.9 inches), against a normal of 14 days and 3.7 inches. The warmest day looks like 10 August (92.1°), the coolest 22 August (79.1°).
89.6°/82.1°
Average high / low
+1.4°
Above normal
8 / 14
Wet days / normal
3.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
90.9°
87.2°
+2.1°
19 August – 28 August
87.4°
86.7°
+0.4°
29 August – 7 September
at normal
86.1°
—
August records over 66 years
99°20 August 2025All-time high
71.6°21 August 1969All-time low
Climate normals and records are computed from the nearest reference point — Highland Beach (2 mi).
Mon, 1092° / 79°0.03
92 °
Tropic Isle, Monday, 10 August
Light rain. High 92°, low 79°.
Pressure30.15 inHg
Wind10.7 mph SE
Humidity57%
Visibility6.2 mi
Dew point72°
Tue, 1190° / 84°0
90 °
Tropic Isle, Tuesday, 11 August
Clear. High 90°, low 84°.
Pressure30.12 inHg
Wind8.4 mph E
Humidity57%
Visibility6.2 mi
Dew point71°
Wed, 1291° / 84°0
91 °
Tropic Isle, Wednesday, 12 August
Clear. High 91°, low 84°.
Pressure30.06 inHg
Wind6.1 mph SE
Humidity54%
Visibility6.2 mi
Dew point71°
Thu, 1392° / 84°0
92 °
Tropic Isle, Thursday, 13 August
Clear. High 92°, low 84°.
Pressure30.06 inHg
Wind14.7 mph SE
Humidity52%
Visibility—
Dew point71°
Fri, 1490° / 84°0
90 °
Tropic Isle, Friday, 14 August
Partly cloudy. High 90°, low 84°.
Pressure30.12 inHg
Wind12.8 mph E
Humidity54%
Visibility—
Dew point71°
Sat, 1589° / 85°0.09
89 °
Tropic Isle, Saturday, 15 August
Light rain. High 89°, low 85°.
Pressure30.15 inHg
Wind12.6 mph SE
Humidity58%
Visibility—
Dew point72°
Sun, 1690° / 83°0.03
90 °
Tropic Isle, Sunday, 16 August
Light rain. High 90°, low 83°.
Pressure30.09 inHg
Wind10.8 mph E
Humidity53%
Visibility—
Dew point70°
Mon, 1789° / 83°0.03
89 °
Tropic Isle, Monday, 17 August
Light rain. High 89°, low 83°.
Pressure30.03 inHg
Wind9.3 mph E
Humidity63%
Visibility—
Dew point72°
Tue, 1892° / 84°0.13
92 °
Tropic Isle, Tuesday, 18 August
Light rain. High 92°, low 84°.
Pressure29.97 inHg
Wind13.4 mph SE
Humidity52%
Visibility—
Dew point71°
Wed, 1991° / 79°0.49
91 °
Tropic Isle, Wednesday, 19 August
Rain. High 91°, low 79°.
Pressure29.97 inHg
Wind13.6 mph S
Humidity55%
Visibility—
Dew point71°
Thu, 2091° / 84°0.2
91 °
Tropic Isle, Thursday, 20 August
Rain. High 91°, low 84°.
Pressure30.00 inHg
Wind12.9 mph SE
Humidity55%
Visibility—
Dew point71°
Fri, 2186° / 79°0.29
86 °
Tropic Isle, Friday, 21 August
Light rain. High 86°, low 79°.
Pressure30.00 inHg
Wind9.7 mph NE
Humidity62%
Visibility—
Dew point71°
Sat, 2285° / 79°1.09
85 °
Tropic Isle, Saturday, 22 August
Rain. High 85°, low 79°.
Pressure29.97 inHg
Wind8.8 mph S
Humidity65%
Visibility—
Dew point71°
Sun, 2386° / 80°0.97
86 °
Tropic Isle, Sunday, 23 August
Rain. High 86°, low 80°.
Pressure29.97 inHg
Wind14 mph S
Humidity61%
Visibility—
Dew point70°
Mon, 2487° / 81°0.55
87 °
Tropic Isle, Monday, 24 August
Rain. High 87°, low 81°.
Pressure30.03 inHg
Wind12.2 mph E
Humidity61%
Visibility—
Dew point71°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 77°0.24
86 °
Tropic Isle, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.24 in
Chance of precipitation90%
Record high90° (1998)
Record low73° (2002)
Wed, 2686° / 77°0.26
86 °
Tropic Isle, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.26 in
Chance of precipitation87%
Record high91° (1998)
Record low74° (1997)
Thu, 2786° / 77°0.22
86 °
Tropic Isle, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation85%
Record high91° (2011)
Record low74° (1969)
Fri, 2886° / 77°0.24
86 °
Tropic Isle, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.24 in
Chance of precipitation80%
Record high90° (2023)
Record low73° (1984)
Sat, 2986° / 77°0.21
86 °
Tropic Isle, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.21 in
Chance of precipitation78%
Record high91° (1999)
Record low72° (1994)
Sun, 3086° / 77°0.21
86 °
Tropic Isle, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.21 in
Chance of precipitation82%
Record high91° (2025)
Record low72° (1969)
Mon, 3187° / 77°0.27
87 °
Tropic Isle, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low77°
Average precipitation0.27 in
Chance of precipitation83%
Record high94° (2025)
Record low74° (1968)
Tue, 0186° / 77°0.22
86 °
Tropic Isle, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation90%
Record high92° (1998)
Record low73° (1972)
Wed, 0286° / 77°0.22
86 °
Tropic Isle, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.22 in
Chance of precipitation80%
Record high91° (1998)
Record low73° (2022)
Thu, 0386° / 77°0.26
86 °
Tropic Isle, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.26 in
Chance of precipitation80%
Record high91° (2022)
Record low73° (1967)
Fri, 0486° / 76°0.28
86 °
Tropic Isle, Friday, 4 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.28 in
Chance of precipitation80%
Record high91° (2019)
Record low72° (1967)
Sat, 0586° / 77°0.38
86 °
Tropic Isle, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low77°
Average precipitation0.38 in
Chance of precipitation87%
Record high91° (2022)
Record low71° (2008)
Sun, 0686° / 76°0.29
86 °
Tropic Isle, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.29 in
Chance of precipitation82%
Record high93° (2019)
Record low71° (2008)
Mon, 0786° / 76°0.22
86 °
Tropic Isle, Monday, 7 September
Climate normal for this date — 60-year average.
Average high86°
Average low76°
Average precipitation0.22 in
Chance of precipitation82%
Record high92° (2022)
Record low73° (2023)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Tropic Isle, FL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Tropic Isle, FL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.