Seaford in Summer
In summer (December, January and February), Seaford sees average daytime highs around 25°C and overnight lows near 14°C, with 156 mm of rain over about 20 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Over the season highs climb from about 23°C in early December to 25°C by late February. The sky is clear or mostly clear about 36% of the time across summer, and the air most often feels dry.
Summer is Seaford's best season of the year to visit on our travel score. For the whole year in context, see Seaford's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 156 mm
- 20 wet days
- Avg wind
- 12 km/h
- Travel score
- 7.3
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Seaford in Summer
Over the season highs climb from about 23°C in early December to 25°C by late February.
A typical summer day in Seaford reaches about 25°C and drops to 14°C overnight. The warmest of the three months is January, the coolest December.
Seaford weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 14° | 49 | 6.2 | 14.3 | 7.4 |
| Feb | 26° / 15° | 44 | 5.8 | 13.5 | 7.4 |
| Mar | 24° / 13° | 38 | 6.4 | 12.3 | 7.5 |
| Apr | 20° / 11° | 51 | 7.9 | 11 | 6.5 |
| May | 16° / 9° | 53 | 10.2 | 10 | 5.1 |
| Jun | 14° / 7° | 57 | 11.1 | 9.4 | 3.8 |
| Jul | 13° / 7° | 54 | 11.8 | 9.6 | 3.5 |
| Aug | 14° / 7° | 65 | 13 | 10.5 | 3.9 |
| Sep | 17° / 8° | 71 | 13 | 11.7 | 4.8 |
| Oct | 19° / 9° | 68 | 11.5 | 13 | 5.8 |
| Nov | 22° / 11° | 64 | 9.8 | 14.1 | 6.5 |
| Dec | 24° / 13° | 62 | 8.4 | 14.6 | 7.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 36% of the time across summer.
Chance of precipitation in Summer
Seaford gets around 156 mm of rain over 20 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 12 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 min in early December to 13 hours by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.8 kWh/m².
Is summer a good time to visit Seaford?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Seaford for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Seaford in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Seaford sees daytime highs around 25°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 20 days see rain.
Sea temperature near Seaford in Summer
The nearest coast averages about 20°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 21°C and coldest in August near 11°C.
It's comfortable for a long swim from Jan 18 to Mar 11 — about 1.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 20 | 21 | 20 | 18 | 15 | 13 | 12 | 11 | 12 | 14 | 17 | 18 |
| Comfort | Refreshing | Refreshing | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 20 | Refreshing |
| Feb | 21 | Refreshing |
| Mar | 20 | Cool |
| Apr | 18 | Cool |
| May | 15 | Cool |
| Jun | 13 | Bracing |
| Jul | 12 | Bracing |
| Aug | 11 | Bracing |
| Sep | 12 | Bracing |
| Oct | 14 | Bracing |
| Nov | 17 | Cool |
| Dec | 18 | Cool |
UV index in Seaford in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Seaford peaks around December 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 10 | 8 | 5 | 3 | 2 | 2 | 3 | 4 | 7 | 10 | 12 |
| Level | Extreme | Extreme | Very high | Moderate | Moderate | Low | Moderate | Moderate | Moderate | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 10 | Extreme |
| Mar | 8 | Very high |
| Apr | 5 | Moderate |
| May | 3 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Moderate |
| Aug | 3 | Moderate |
| Sep | 4 | Moderate |
| Oct | 7 | Very high |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Where is Seaford?
Seaford sits at 38.1°S, 145.1°E, 7 m above sea level, in Australia. The nearest listed city is Carrum Downs, 3.0 km away.
Topography around Seaford
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Seaford.
Within 3 km, the terrain around Seaford has only modest variations in elevation — a maximum elevation change of 26 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,302 m.
The land around Seaford is covered by artificial surfaces (35%) and water (34%) within 3 km, water (36%), artificial surfaces (23%) and grassland (20%) within 16 km, and water (32%), grassland (30%) and trees (24%) within 80 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
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 Seaford (-38.1°, 145.1333°, elevation 7 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.