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Forecast

Onslow (21.6363°S, 115.1124°E, 3m AMSL) set as my default location ›

  1. My MLA

  2. Current condition

    TODAY
    Sunny 13° 28°
    Chance of rain: 5%
    Likely amount: < 1mm
    First
    light
    Sunrise Sunset Last light
    Sunrise Sunset
    6:27am WST 6:51am WST 6:01pm WST 6:24pm WST
    NOW
    23.5° Feels Like: 15.5°
    Relative Humidity: 18%
    Dew: -2.2°
    Wind: E 30km/h
    Gust: 39km/h
    Rainfall since 9am: 0.0mm
    Pressure: 1024.1hPa
  3. Today Weather

    Onslow
    Now
    21.3°c
    Feels Like:
    15.4°
    Wind:
    E 28km/h
    Gusts:
    33km/h
    Humidity:
    42%
    Sunny
     
    13°
    Min
    28°
    Max
    Today in Onslow
    Sunny. Winds SE 25 to 35 km/h tending E/SE 30 to 45 km/h in the morning. Daytime maximum temperatures 23 to 29.
    Tomorrow
    Sunny
    16°
    Min
    29°
    Max
    Sunny. Winds E/SE 30 to 45 km/h. Overnight temperatures falling to between 9 and 16 with daytime temperatures reaching 24 to 30.
  4. Radar

  5. Popup Radar

  6. Warnings

  7. Next 48 Hours


    Next 48 Hours


  8. 7 day forecast

    Today: Sunny. Winds SE 25 to 35 km/h tending E/SE 30 to 45 km/h in the morning. Daytime maximum temperatures 23 to 29.

    Forecast for Onslow (21.6363°S, 115.1124°E, 3m AMSL)
      Wed Thu Fri Sat Sun Mon Tue
    Summary Sunny Sunny Mostly sunny Mostly sunny Mostly sunny Possible shower Mostly sunny
    Minimum 13° 16° 18° 19° 18° 18° 15°
    Maximum 28° 29° 28° 26° 26° 27° 25°
    Chance of rain 5% 5% 20% 50% 60% 50% 5%
    Likely amount < 1mm < 1mm < 1mm < 1mm 1-5mm 1-5mm < 1mm
    UV index High High High High High - -
    Frost risk Nil Nil Nil Nil Nil Nil Nil
      9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm
    Wind speed 20
    (km/h)
    11
    (km/h)
    27
    (km/h)
    22
    (km/h)
    36
    (km/h)
    37
    (km/h)
    29
    (km/h)
    36
    (km/h)
    14
    (km/h)
    22
    (km/h)
    13
    (km/h)
    18
    (km/h)
    26
    (km/h)
    31
    (km/h)
    Wind direction SE N E NE ENE NE ENE NE NE NNE SSE W S SSW
    Relative humidity 28% 22% 28% 35% 30% 38% 41% 49% 73% 63% 75% 60% 63% 32%
    Dew point 1°C 4°C 3°C 11°C 5°C 11°C 10°C 13°C 18°C 17°C 18°C 17°C 12°C 6°C
  9. 28 Day Rainfall forecast

    Onslow Rain Forecast


    Onslow 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    4
    5
    6
    7
    8
    LOW
    9
    LOW
    10
    11
    12
    13
    14
    15
    16
    LOW
    17
    18
    LOW
    19
    LOW
    20
    21
    22
    23
    24
    25
    26
    LOW
    27
    28
    29
    30
    31
    LOW
    Sep 1
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued Aug 4

    Issue Notes

    The hemispheric long wave pattern has been relatively slow moving in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, New Zealand, the south Pacific, and South America.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 9 August to 13 August, 23 August to 27 August, and 2 September to 6 September. Rain events originating in the tropics and moving south are possible about 22 August to 26 August, 3 September to 7 September, and 7 September to 11 September. Over Western Australia the strongest cold fronts should occur about 9 August to 13 August, 14 August to 18 August, and 18 August to 22 August.

    Forecast Explanation

    This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

    The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

    In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

  10. 12 Month Rainfall Forecast

    Onslow Rain Forecast


    Onslow 12-month Rainfall Forecast
    Aug
    Sep
    Oct
    Nov
    Dec
    Jan
    Feb
    Mar
    Apr
    May
    Jun
    2021
    2022
    8
    9
    8
    9
    8
    7
    7
    1
    7
    6
    8
    10
    5
    0
    1
    2 - 3
    4 - 7
    8 - 9
    10
    Well below normal
    Below normal
    Near normal
    Above normal
    Well above normal

    Issue Notes - Issued Jul 13

    ENSO status: Neutral, however two models suggest La Niña thresholds may be met again from September. IOD status: Neutral, although it was negative for six weeks between mid-May and late-June SAM status: Negative. The El Niño–Southern Oscillation (ENSO) is currently neutral. However, there are growing signs that La Niña could redevelop in the Pacific Ocean later this year, prompting the US Climate Prediction Centre to issue a La Niña Watch this week. Two models forecast temperatures reaching the La Niña threshold during September. The Indian Ocean Dipole (IOD) is currently neutral, although we saw six consecutive weeks below the negative IOD threshold between mid-May and late-June. The IOD index needs to stay below -0.4C for eight consecutive weeks to be officially declared as a negative IOD event. The IOD ducked back into neutral territory thanks to recent warming in the western Indian Ocean. While a negative IOD has not been officially declared, the negative weekly values may enhance rainfallacross central and southern Australia. Three of the five models are forecasting the negative IOD to develop in winter, with another one indicating development in early spring. Most of the models suggest that the negative IOD will continue through until mid spring. During winter, much of the Australia is likely to be wetter than normal, apart from far southern WA and SA, southern VIC and southwestern TAS. The weekly negative IOD values may be influencing this outlook, potentially feeding moisture into cold fronts sweeping across central and southern Australia. Therefore a normal to above normal snow season is forecast. Springs rainfall at this stage is forecast to be above normal for much of the Australia, apart from southwestern TAS and WA. Again, the negative IOD values may be playing a role in this outlook.

  11. Long range rainfall forecast

    Onslow Rain Forecast


    Onslow 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    4
    5
    6
    7
    8
    LOW
    9
    LOW
    10
    11
    12
    13
    14
    15
    16
    LOW
    17
    18
    LOW
    19
    LOW
    20
    21
    22
    23
    24
    25
    26
    LOW
    27
    28
    29
    30
    31
    LOW
    Sep 1
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued Aug 4

    Issue Notes

    The hemispheric long wave pattern has been relatively slow moving in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, New Zealand, the south Pacific, and South America.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 9 August to 13 August, 23 August to 27 August, and 2 September to 6 September. Rain events originating in the tropics and moving south are possible about 22 August to 26 August, 3 September to 7 September, and 7 September to 11 September. Over Western Australia the strongest cold fronts should occur about 9 August to 13 August, 14 August to 18 August, and 18 August to 22 August.

    Forecast Explanation

    This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

    The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

    In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

  12. Popup - Daily historical

  13. Past 5 Days

    Onslow Past 5 Days

    This Month
    Minimum Maximum Rainfall
    Saturday
    Jul 31
    17.1 °C 25.5 °C
    0.0 mm
    Sunday
    Aug 01
    11.5 °C 24.2 °C
    0.0 mm
    Monday
    Aug 02
    12.1 °C 25.7 °C
    0.0 mm
    Tuesday
    Aug 03
    11.8 °C 26.4 °C
    0.0 mm
    Wednesday
    Aug 04
    10.4 °C 23.7 °C
    0.0 mm
    Legend
  14. Almanac

    Almanac


    Onslow minimum temp history (21.6363°S, 115.1124°E, 3m AMSL)
    MAXIMUM TEMPERATURE MINIMUM TEMPERATURE
    Hottest this month 25.7° 02/08/2021 Coldest this month 11.5° 01/08/2021
    Hottest on record 35.2 18/08/2012 Coldest on record 5.1 10/08/1968
    Hottest this year 46.7° 15/01/2021 Coldest this year 8.3° 23/06/2021
    Long term average 27.4° Long term average 13.6°
    Average this month 25.0° Average this month 11.8°
    Hottest August On Record Avg. max. temp. 30.5° 2014 Coldest August on record Avg. min. temp. 10.7° 1968
    Onslow rainfall history (21.6363°S, 115.1124°E, 3m AMSL)
    RAINFALL
    Wettest This Month 0.0mm 03/08/2021 Total This Month 0.0mm
    0.0 days
    Long Term Average 8.4mm 2.9 days Wettest August on record 81.8mm 1941
    Driest on record 0.0mm 2015
  15. Popup - Radar

    Weather Radar for Australia

  16. Year to Date

    Onslow Year To Date

    Average Rainfall To Aug 299.2mm 30.3 day(s)
    Total For 2021 268.4mm 29.0 day(s)
    Total To This Day 2020 66.4mm 9.0 day(s)
    Wettest Day 74.8mm Mar 3
    Lowest Temperature 8.3°C Jun23
    Highest Temperature 46.7°C Jan15
  17. Popup - Monthly historical

  18. Climatology

    Climate History

    Onslow Climatology

    Long-Term Averages
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
    Mean Max (°C) 36.5 36.3 36.2 34.0 29.4 26.1 25.5 27.4 30.2 33.0 34.4 36.0 32.0
    Mean Min (°C) 24.5 25.0 24.3 21.5 17.4 14.4 13.1 13.6 15.5 18.0 20.2 22.5 19.1
    Mean Rain (mm) 38.8 61.5 64.7 13.1 47.4 46.0 19.3 8.4 1.3 0.7 2.7 3.4 308.1
    Mean Rain Days 3.5 4.4 3.6 2.4 4.5 5.1 3.9 2.9 1.0 0.6 0.5 1.0 34.0