Central Coast weather in September

In September, Central Coast sees average daytime highs of 20°C and overnight lows near 12°C, with 51 mm of rain across 6.8 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Central Coast's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Central Coast's year-round climate.

Daytime high
20°
8th warmest
Overnight low
12°
4th coldest
Rainfall
51 mm
6.8 wet days
Daylight
11 h 48 min
6:55 AM – 6:43 PM
Cloud cover
38%
3rd clearest
Wind
14 km/h
3rd windiest
Solar energy
4.9 kWh/m²
Travel score
7.1
out of 10
Air quality
Moderate
PM2.5 10.5 µg/m³ · 2019

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 21°C by the end.

A typical September day in Central Coast reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 25°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
11911
21911
31911
41911
51911
61911
71911
81911
91911
101912
112012
122012
132012
142012
152012
162012
172012
182012
192012
202012
212112
222112
232112
242113
252113
262113
272113
282113
292113
302113

Central Coast weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 19°7810.5146.7
Feb25° / 20°10111.113.26.5
Mar24° / 18°891212.36.8
Apr22° / 15°7710.211.26.8
May19° / 13°709.110.36.5
Jun17° / 11°869.69.85.7
Jul17° / 497.2105.9
Aug18° / 10°496.510.86.7
Sep20° / 12°516.811.87.1
Oct22° / 14°628.512.87.0
Nov23° / 16°811013.76.8
Dec25° / 18°7010.314.27.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27228
37228
47327
57426
67426
77525
87525
97624
107624
117624
127723
137723
147723
157624
167624
177624
187624
197624
207525
217525
227426
237426
247327
257327
267327
277228
287129
297030
306931

Chance of precipitation in September

Any precipitation

Central Coast gets around 51 mm of rain over 6.8 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 23% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
427
527
626
726
825
925
1024
1123
1223
1322
1421
1521
1620
1720
1820
1920
2020
2120
2220
2320
2421
2521
2621
2721
2822
2922
3023

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19460
29460
39370
49370
59370
69370
79370
89370
99280
109280
119280
129190
139190
1490100
1589101
1688111
1788111
1887121
1987121
2086131
2186131
2285132
2384142
2484142
2583152
2681163
2781163
2880173
2979183
3079183

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:16 AM to 6:35 AM, and sunset from 6:32 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:166:32
211.37:156:33
311.37:136:34
411.47:126:34
511.47:116:35
611.47:096:36
711.57:086:37
811.57:066:37
911.57:056:38
1011.67:046:39
1111.67:026:39
1211.77:016:40
1311.76:596:41
1411.76:586:41
1511.86:566:42
1611.86:556:43
1711.86:546:43
1811.96:526:44
1911.96:516:45
2011.96:496:45
2112.06:486:46
2212.06:466:47
2312.06:456:48
2412.16:436:48
2512.16:426:49
2612.26:416:50
2712.26:396:50
2812.26:386:51
2912.36:366:52
3012.36:356:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.9 kWh/m².

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 6.49 kWh/m² in January across the year — September's 4.9 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.3Bright
34.3Bright
44.3Bright
54.4Bright
64.4Bright
74.5Bright
84.5Bright
94.6Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.1Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Central Coast

In seasonPeak

None of Central Coast's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Central Coast sits in the South Indian Ocean cyclone belt; the season peaks January–March.

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

Is September a good time to visit Central Coast?

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

7.1
Sightseeing
1st-best month of the year
3.7
Beach & pool
8th-best month of the year

September is one of the better times to visit Central Coast for general sightseeing.

What to pack for Central Coast in September

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

In September, Central Coast sees daytime highs around 20°C and nights near 12°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Central Coast in September

The nearest coast averages about 18°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in February at about 23°C and coldest in August near 18°C.

It's comfortable for a long swim from Nov 16 to Jun 4 — about 6.6 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr22Refreshing
May21Refreshing
Jun20Cool
Jul19Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov20Refreshing
Dec21Refreshing

UV index in Central Coast in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Central Coast peaks around January 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 12Jun 19UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov10Very high
Dec12Extreme

Air quality in Central Coast 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 Central Coast is worst in December — around 17 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Central Coast's WHO annual average of 10.5 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateDec 1416 µg/m³Jun 167 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb9Good
Mar9Good
Apr8Good
May8Good
Jun7Good
Jul8Good
Aug10Good
Sep14Moderate
Oct12Good
Nov14Moderate
Dec17Moderate
Location & terrain

Where is Central Coast?

Central Coast sits at 33.4°S, 151.4°E, 15 m above sea level, in Australia. The nearest listed city is Umina Beach, 12 km away.

Topography around Central Coast

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Central Coast.

Within 3 km, the terrain around Central Coast has only modest variations in elevation — a maximum elevation change of 215 m around an average of 46 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 331 m; within 80 km, large variations in elevation — a maximum elevation change of 819 m.

The land around Central Coast is covered by trees (66%) and artificial surfaces (20%) within 3 km, trees (54%) and water (33%) within 16 km, and trees (53%) and water (32%) within 80 km.

3 km
215 m
16 km
331 m
80 km
819 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Umina Beach 12 km · Pittwater 27 km · Dee Why 37 km · Saint Ives 39 km · Hornsby 39 km · Wahroonga 40 km · Manly 42 km · Cherrybrook 44 km

Australia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 90% of US
price level, 2025
GDP per capita
$65,130
2025
Happiness
6.9 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2023
Road deaths
4.9
per 100k/yr, 2019
Income group
High
World Bank
Religion
none 38%Roman Catholic 20%Protestant 18%other Christian 4%

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 Central Coast (-33.4298°, 151.3714°, elevation 15 m), 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).