Fort Walton Beach weather in September

In September, Fort Walton Beach sees average daytime highs of 84°F and overnight lows near 73°F, with 4.6 in of rain across 12.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 82°F by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Fort Walton Beach's 6th-clearest and 9th-windiest month. For the whole year in context, see Fort Walton Beach's year-round climate.

Daytime high
84°
4th warmest
Overnight low
73°
9th coldest
Rainfall
4.6 in
12.2 wet days
Daylight
12 h 12 min
5:35 AM – 5:46 PM
Cloud cover
51%
6th clearest
Wind
7 mph
9th windiest
Solar energy
4.93 kWh/m²
Travel score
5.3
out of 10

Fort Walton Beach is city in Okaloosa County, Florida, United States.

Density
1,014/km²
people per km²
Founded
1941

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 86°F in the first days to 82°F by the end.

A typical September day in Fort Walton Beach reaches about 84°F in the afternoon and slips back to 73°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 89°F. Set against its neighbours, September runs about 3°F cooler than August and about 7°F warmer than October.

60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18675
28675
38675
48675
58675
68674
78674
88674
98574
108574
118574
128573
138573
148573
158573
168573
178573
188472
198472
208472
218472
228471
238371
248371
258370
268370
278270
288269
298269
308269

How September really feels in Fort Walton Beach

Once humidity and wind are folded in, September averages 16 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
16
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Fort Walton Beach weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan60° / 45°4.68.510.35.0
Feb63° / 49°4.27.410.95.9
Mar68° / 54°4.88.611.86.7
Apr74° / 61°3.67.412.77.4
May81° / 69°2.78.613.56.7
Jun86° / 75°4.715.713.94.4
Jul87° / 77°5.520.613.83.5
Aug87° / 76°5.920.213.13.7
Sep84° / 73°4.612.212.25.3
Oct77° / 63°3.56.611.37.6
Nov68° / 53°3.2710.57.1
Dec62° / 48°4.38.810.15.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25248
35347
45446
55446
65545
75644
85743
95842
105842
115941
125941
136040
146040
156040
166040
176040
186040
196040
206040
216040
226040
236139
246139
256139
266139
276238
286238
296337
306337

Chance of precipitation in September

Any precipitation

Fort Walton Beach gets around 4.6 in of rain over 12.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
153
253
352
451
550
649
748
847
946
1044
1143
1243
1342
1441
1541
1640
1740
1839
1939
2038
2137
2236
2335
2434
2533
2632
2731
2830
2929
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 86% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101295830
2012105829
3013115827
4013115926
5013126024
6014135923
7014146021
8015155920
9015165919
10016175818
11016185718
12017195518
13117205417
14128215117
15128225017
16129225016
17129234916
18139234815
19239234715
202410234714
213510234613
223611234513
234711234412
245711234311
25581223439
26691223428
276101322417
287111322407
298121322396
308121422385

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297light breeze
307light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over September. Sunrise moves from 5:27 AM to 5:44 AM, and sunset from 6:06 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:276:06
212.65:276:04
312.65:286:03
412.65:286:02
512.55:296:01
612.55:305:59
712.55:305:58
812.45:315:57
912.45:315:55
1012.45:325:54
1112.35:325:53
1212.35:335:51
1312.35:345:50
1412.25:345:49
1512.25:355:48
1612.25:355:46
1712.15:365:45
1812.15:365:44
1912.15:375:42
2012.15:385:41
2112.05:385:40
2212.05:395:38
2312.05:395:37
2411.95:405:36
2511.95:415:34
2611.95:415:33
2711.85:425:32
2811.85:425:31
2911.85:435:29
3011.75:445:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.93 kWh/m².

For context, solar energy here swings from a low near 2.77 kWh/m² to a high of 6.46 kWh/m² in May across the year — September's 4.93 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Fort Walton Beach

In seasonPeak

In September, Fort Walton Beach sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Fort Walton Beach sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Fort Walton Beach?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.3
Sightseeing
8th-best month of the year
6.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Fort Walton Beach for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Fort Walton Beach in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Fort Walton Beach sees daytime highs around 84°F and nights near 73°F. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Fort Walton Beach in September

The nearest coast averages about 83°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 85°F and coldest in February near 64°F.

It's comfortable for a long swim from Apr 6 to Dec 18 — about 8.4 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan65Cool
Feb64Cool
Mar65Cool
Apr69Refreshing
May76Warm
Jun82Warm
Jul84Tropical
Aug85Tropical
Sep83Tropical
Oct79Warm
Nov72Refreshing
Dec68Refreshing

UV index in Fort Walton Beach in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fort Walton Beach peaks around June 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJun 17UV 10Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr9Very high
May9Very high
Jun10Extreme
Jul9Very high
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Fort Walton Beach in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Fort Walton Beach is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Dec 147 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar12Moderate
Apr13Moderate
May12Moderate
Jun17Moderate
Jul19Moderate
Aug16Moderate
Sep12Moderate
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Fort Walton Beach?

Fort Walton Beach sits at 30.4°N, 86.6°W, 7 ft above sea level, in United States. The nearest listed city is Wright, 2.5 mi away.

Topography around Fort Walton Beach

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Fort Walton Beach.

Within 2 miles, the terrain around Fort Walton Beach has only modest variations in elevation — a maximum elevation change of 62 ft around an average of 20 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 236 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 384 ft.

The land around Fort Walton Beach is covered by artificial surfaces (36%), trees (33%) and water (23%) within 2 miles, water (51%) and trees (30%) within 10 miles, and trees (53%) and water (35%) within 50 miles.

2 miles
62 ft
10 miles
236 ft
50 miles
384 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Wright 2.5 mi · Navarre 15 mi · Midway 23 mi · Santa Rosa Beach 23 mi · Crestview 24 mi · East Pensacola Heights 34 mi · Pace 35 mi · Pensacola 36 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Fort Walton Beach (30.4206°, -86.6171°, elevation 7 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).