Shellharbour, Australia experiences average highs of 21°C (70°F) and lows of 15°C (59°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Shellharbour, Australia Weather & Climate 2026
Monthly climate averages for Shellharbour, Australia. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.9/10
Best: January, February, April, November
UV Index
6
High
Temperature 21°C / 15°C
Feels Like 21°C / 14°C
Rainy Days 12
Rainfall 98 mm
Sunshine 10 h
Humidity 74%
Wind Speed 18 km/h
Dew Point 13°C
Hottest Month
25°C
January
Avg Low 20°C
Rain 16 days
Coldest Month
11°C
July
Avg High 16°C
Rain 8 days
Driest Month
8 days
July
Avg High 16°C
Avg Low 11°C
Windiest Month
19 km/h
July (Gusts 45)
Sea Temperature
17°C – 23°C
Warmest water: February (
23.2°C
)
Worst Time to Visit
Consider avoiding May, June, July, August due to less favorable weather conditions.
Sun Position
Sunrise 07:01
Daylight 10h
Sunset 17:04
Live conditions —
Shellharbour on the map · live conditions
Shellharbour, Australia
- Continent
- Oceania
- Country
- Australia
- City
- Shellharbour
- Population
- 3.6K
- Coordinates
- -34.58°, 150.87°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 21°C
Avg Low 14°C
Rain 11 days/mo
1/3 best months
Summer
Dec–Feb
Avg High 25°C
Avg Low 19°C
Rain 14 days/mo
2/3 best months
Autumn
Mar–May
Avg High 21°C
Avg Low 16°C
Rain 13 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 16°C
Avg Low 11°C
Rain 9 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 25°C / 20°C . Feb: 25°C / 20°C . Mar: 23°C / 19°C . Apr: 21°C / 16°C . May: 19°C / 13°C . Jun: 16°C / 11°C . Jul: 16°C / 11°C . Aug: 17°C / 11°C . Sep: 19°C / 13°C . Oct: 21°C / 14°C . Nov: 22°C / 16°C . Dec: 24°C / 18°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 115 mm. Feb: 133 mm. Mar: 184 mm. Apr: 82 mm. May: 83 mm. Jun: 78 mm. Jul: 80 mm. Aug: 70 mm. Sep: 66 mm. Oct: 98 mm. Nov: 94 mm. Dec: 94 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 79%. Feb: 78%. Mar: 79%. Apr: 76%. May: 73%. Jun: 73%. Jul: 70%. Aug: 70%. Sep: 68%. Oct: 72%. Nov: 73%. Dec: 75%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 18 km/h . Mar: 17 km/h . Apr: 16 km/h . May: 17 km/h . Jun: 19 km/h . Jul: 19 km/h . Aug: 19 km/h . Sep: 19 km/h . Oct: 19 km/h . Nov: 19 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 10h. Mar: 9h. Apr: 9h. May: 8h. Jun: 8h. Jul: 8h. Aug: 9h. Sep: 10h. Oct: 10h. Nov: 11h. Dec: 11h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 22°C . Feb: 23°C . Mar: 23°C . Apr: 22°C . May: 21°C . Jun: 19°C . Jul: 17°C . Aug: 18°C . Sep: 18°C . Oct: 19°C . Nov: 20°C . Dec: 21°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 7. Mar: UV 6. Apr: UV 5. May: UV 3. Jun: UV 3. Jul: UV 3. Aug: UV 4. Sep: UV 6. Oct: UV 7. Nov: UV 7. Dec: UV 8.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Dec 2025 · 25°C | Jan · 25°C |
| Coldest month | Jun 2025 · 10°C | Jul · 11°C |
| Wettest month | Aug 2025 · 182 mm | Mar · 184 mm |
| Windiest month | Jul 2025 · 21 km/h | Jul · 19 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Good April best
Excellent May
Good June
Good July
Good August
Good September
Good October
Good November best
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 25°C / 20°C | 28°C / 21°C | 16days (115 mm) Wet | 10.4h Excellent | 79% Humid | 7.4 Very High | Excellent | View Details |
| February best | 25°C / 20°C | 27°C / 20°C | 14days (133 mm) Wet | 10.3h Excellent | 78% Humid | 7.4 Very High | Excellent | View Details |
| March | 23°C / 19°C | 25°C / 19°C | 18days (184 mm) Wet | 9.1h Good | 79% Humid | 6.2 High | Good | View Details |
| April best | 21°C / 16°C | 22°C / 16°C | 10days (82 mm) Wet | 9h Good | 76% Humid | 5 Moderate | Excellent | View Details |
| May | 19°C / 13°C | 17°C / 11°C | 10days (83 mm) Wet | 8.3h Good | 73% Muggy | 3.3 Moderate | Good | View Details |
| June | 16°C / 11°C | 14°C / 8°C | 9days (78 mm) Wet | 7.7h Good | 73% Muggy | 3 Moderate | Good | View Details |
| July | 16°C / 11°C | 13°C / 8°C | 8days (80 mm) Wet | 8.2h Good | 70% Muggy | 3.3 Moderate | Good | View Details |
| August | 17°C / 11°C | 15°C / 8°C | 9days (70 mm) Wet | 8.9h Good | 70% Muggy | 4.1 Moderate | Good | View Details |
| September | 19°C / 13°C | 18°C / 10°C | 9days (66 mm) Wet | 10h Excellent | 68% Muggy | 5.9 High | Good | View Details |
| October | 21°C / 14°C | 21°C / 13°C | 12days (98 mm) Wet | 10.2h Excellent | 72% Muggy | 7 High | Good | View Details |
| November best | 22°C / 16°C | 23°C / 16°C | 13days (94 mm) Wet | 10.8h Excellent | 73% Muggy | 7.4 Very High | Excellent | View Details |
| December | 24°C / 18°C | 26°C / 18°C | 13days (94 mm) Wet | 11.1h Excellent | 75% Muggy | 8.3 Very High | Good | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Shellharbour are January, February, April, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Shellharbour, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Shellharbour is January, with average daytime highs of 25°C (77°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Shellharbour is July, with average overnight lows of 11°C (51°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Shellharbour is March, averaging 184mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Shellharbour runs through March, January, February, November, with the heaviest rainfall in March. Based on 10-year averages for Shellharbour.
Shellharbour receives approximately 114 sunshine hours per year. The sunniest month is December with around 11 hours. Based on climate data for Shellharbour.
The least favorable months to visit Shellharbour are May, June, July, August, primarily due to less favorable weather conditions. For the best conditions, consider January, February, April, November instead.
The annual average UV index in Shellharbour is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Shellharbour is 74%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April average 23°C (73°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Shellharbour are 18 km/h (11 mph). The windiest month is July with peak winds reaching 19 km/h (12 mph) (gusts up to 45 km/h / 28 mph).
Shellharbour averages 6 clear-sky days per month with overall cloud cover around 51%. The clearest skies occur in July.
The annual average dew point in Shellharbour is 13°C (55°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Shellharbour has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Shellharbour ranges from 14°C (57°F) to 21°C (70°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, July is a great time to visit Shellharbour. It earns a climate score of 7.3/10 with Good.
For July in Shellharbour, pack Layered clothing, Light jacket, Umbrella, Comfortable walking shoes. With average highs of 16°C (60°F) and 8 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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