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Forecast

Perth (31.9554°S, 115.8586°E, 5m AMSL) set as my default location ›

  1. My MLA

  2. Current condition

    TODAY
    Thunderstorms 12° 17°
    Chance of rain: 90%
    Likely amount: 20-40mm
    First
    light
    Sunrise Sunset Last light
    Sunrise Sunset
    6:36am WST 7:03am WST 5:23pm WST 5:50pm WST
    NOW
    14.1° Feels Like: 12.6°
    Relative Humidity: 95%
    Dew: 13.3°
    Wind: N 13km/h
    Gust: 17km/h
    Rainfall since 9am: 18.8mm
    Pressure: 1003.3hPa
  3. Today Weather

    Perth
    Now
    16.9°c
    Feels Like:
    10.9°
    Wind:
    NW 35km/h
    Gusts:
    44km/h
    Humidity:
    77%
    Thunderstorms
     
    12°
    Min
    17°
    Max
    Today in Perth
    Cloudy. Very high (near 100%) chance of showers. A thunderstorm likely, possibly severe with damaging winds and heavy rain which may lead to flash flooding. Winds NW 35 to 50 km/h.
    Tomorrow
    Windy with showers
    13°
    Min
    21°
    Max
    Partly cloudy. Very high chance of showers, most likely in the morning. The chance of a thunderstorm in the early morning. Winds W/NW 40 to 50 km/h turning SW 20 to 30 km/h during the morning then decreasing to 15 to 20 km/h in the late afternoon.
  4. Radar

  5. Popup Radar

  6. Warnings

  7. Next 48 Hours


    Next 48 Hours


  8. 7 day forecast

    Today: Cloudy. Very high (near 100%) chance of showers. A thunderstorm likely, possibly severe with damaging winds and heavy rain which may lead to flash flooding. Winds NW 35 to 50 km/h.

    Forecast for Perth (31.9554°S, 115.8586°E, 5m AMSL)
      Mon Tue Wed Thu Fri Sat Sun
    Summary Thunderstorms Windy with showers Possible shower Mostly sunny Mostly sunny Possible shower Possible shower
    Minimum 12° 13° 11°
    Maximum 17° 21° 21° 21° 22° 20° 19°
    Chance of rain 90% 90% 20% 5% 20% 40% 40%
    Likely amount 20-40mm 5-10mm < 1mm < 1mm < 1mm 1-5mm < 1mm
    UV index Moderate Moderate Moderate Moderate Moderate - -
    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 26
    (km/h)
    37
    (km/h)
    22
    (km/h)
    26
    (km/h)
    10
    (km/h)
    10
    (km/h)
    13
    (km/h)
    10
    (km/h)
    13
    (km/h)
    17
    (km/h)
    11
    (km/h)
    18
    (km/h)
    16
    (km/h)
    24
    (km/h)
    Wind direction NNW NW WSW WSW E SSW E ENE ESE S SE SW S SSW
    Relative humidity 84% 73% 76% 66% 89% 56% 80% 48% 72% 50% 79% 56% 75% 51%
    Dew point 13°C 11°C 13°C 14°C 14°C 11°C 11°C 9°C 10°C 10°C 11°C 10°C 8°C 8°C
  9. 28 Day Rainfall forecast

    Perth Rain Forecast


    Perth 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    23
    HIGH
    24
    HIGH
    25
    MEDIUM
    26
    MEDIUM
    27
    MEDIUM
    28
    MEDIUM
    29
    LOW
    30
    LOW
    31
    LOW
    Jun 1
    MEDIUM
    2
    HIGH
    3
    4
    LOW
    5
    MEDIUM
    6
    HIGH
    7
    HIGH
    8
    MEDIUM
    9
    LOW
    10
    LOW
    11
    LOW
    12
    LOW
    13
    MEDIUM
    14
    MEDIUM
    15
    MEDIUM
    16
    MEDIUM
    17
    LOW
    18
    MEDIUM
    19
    MEDIUM
    20
    MEDIUM
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued May22

    Issue Notes

    The hemispheric long wave pattern has remained stable in recent weeks. There are four main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, New Zealand, and South America.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 24 May to 28 May, 6 June to 10 June, and 17 June to 21 June. Rain events originating in the tropics and moving south are possible about 22 May to 26 May, 1 June to 5 June, and 18 June to 22 June. Over Western Australia the strongest cold fronts should occur about 24 May to 28 May, 9 June to 13 June, and 17 June to 21 June.

    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

    Perth Rain Forecast


    Perth 12-month Rainfall Forecast
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec
    Jan
    Feb
    Mar
    Apr
    2022
    2023
    7
    5
    6
    6
    7
    5
    7
    10
    9
    7
    7
    4
    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 May 11

    ENSO status: La Niña, it is expected return to neutral state by early winter. IOD status: Neutral, models suggest it could enter a negative phase in the next month. SAM status: Positive and is expected to remain positive for the next month or so. The El Niño–Southern Oscillation (ENSO) is in a La Niña phase and has not changed in strength during the past two weeks. La Niña events typically breaks down in autumn and while this current La Niña is persisting longer than usual, most models suggest it should end by early winter. However, one seasonal model operated by the U.S. National Weather Service’s Climate Prediction Centre (CPC) suggests that a La Niña-like signal could linger in the Pacific Ocean through the middle of the year and possibly remerge in the Southern Hemisphere’s spring. That being said, it is important to note that seasonal forecast models have lower accuracy at this time of year. This is called the autumn predictability barrier. The La Niña forecast will increase the likelihood of above-average rain in northern and eastern Australia during the remainder of Autumn, possibly into winter. Even as La Niña weakens it should continue to influence our climate. all five climate models suggest a negative phase will begin during late autumn or early winter. Climate models are forecasting strong negative IOD values by August, with the negative IOD event possibly lingering into spring. While a neutral IOD has little influence on our climate, a negative IOD increases the chance of above average autumn and winter rain for much of Australia. The rainfall outlooks are reflecting this, with above average rain forecast during winter for much of Australia, except southwest WA, parts of TAS and VIC. If a negative IOD does develop this winter, it will increase the risk of flooding over large areas of inland Australia, especially areas that had a wet summer and autumn.

  11. Popup - Daily historical

  12. Long range rainfall forecast

    Perth Rain Forecast


    Perth 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    23
    HIGH
    24
    HIGH
    25
    MEDIUM
    26
    MEDIUM
    27
    MEDIUM
    28
    MEDIUM
    29
    LOW
    30
    LOW
    31
    LOW
    Jun 1
    MEDIUM
    2
    HIGH
    3
    4
    LOW
    5
    MEDIUM
    6
    HIGH
    7
    HIGH
    8
    MEDIUM
    9
    LOW
    10
    LOW
    11
    LOW
    12
    LOW
    13
    MEDIUM
    14
    MEDIUM
    15
    MEDIUM
    16
    MEDIUM
    17
    LOW
    18
    MEDIUM
    19
    MEDIUM
    20
    MEDIUM
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued May22

    Issue Notes

    The hemispheric long wave pattern has remained stable in recent weeks. There are four main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, New Zealand, and South America.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 24 May to 28 May, 6 June to 10 June, and 17 June to 21 June. Rain events originating in the tropics and moving south are possible about 22 May to 26 May, 1 June to 5 June, and 18 June to 22 June. Over Western Australia the strongest cold fronts should occur about 24 May to 28 May, 9 June to 13 June, and 17 June to 21 June.

    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.

  13. Past 5 Days

    Perth Past 5 Days

    This Month
    Minimum Maximum Rainfall
    Wednesday
    May 18
    14.3 °C 21.9 °C
    -
    Thursday
    May 19
    11.3 °C 23.0 °C
    2.2 mm
    Friday
    May 20
    15.0 °C 22.3 °C
    0.4 mm
    Saturday
    May 21
    13.9 °C 25.8 °C
    0.2 mm
    Sunday
    May 22
    10.4 °C 24.2 °C
    0.0 mm
    Legend
  14. Almanac

    Almanac


    Perth minimum temp history (31.9554°S, 115.8586°E, 5m AMSL)
    MAXIMUM TEMPERATURE MINIMUM TEMPERATURE
    Hottest this month 26.5° 08/05/2022 Coldest this month 6.1° 07/05/2022
    Hottest on record 34.3 01/05/2002 Coldest on record 1.3 25/05/2012
    Hottest this year 42.5° 05/02/2022 Coldest this year 6.1° 07/05/2022
    Long term average 22.3° Long term average 10.5°
    Average this month 22.7° Average this month 10.8°
    Hottest May On Record Avg. max. temp. 24.4° 2009 Coldest May on record Avg. min. temp. 8.8° 2000
    Perth rainfall history (31.9554°S, 115.8586°E, 5m AMSL)
    RAINFALL
    Wettest This Month 10.6mm 12/05/2022 Total This Month 21.8mm
    7.0 days
    Long Term Average 88.6mm 11.2 days Wettest May on record 191.2mm 2005
    Driest on record 17.8mm 2019
  15. Year to Date

    Perth Year To Date

    Average Rainfall To May 176.9mm 27.9 day(s)
    Total For 2022 104.6mm 20.0 day(s)
    Total To This Day 2021 171.8mm 26.0 day(s)
    Wettest Day 38.0mm Apr11
    Lowest Temperature 6.1°C May 7
    Highest Temperature 42.5°C Feb 5
  16. Popup - Radar

    Weather Radar for Australia

  17. Popup - Monthly historical

  18. Climatology

    Climate History

    Perth Climatology

    Long-Term Averages
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
    Mean Max (°C) 31.3 31.6 29.6 26.0 22.3 19.5 18.5 19.1 20.5 23.4 26.6 29.4 24.8
    Mean Min (°C) 18.1 18.4 16.8 13.8 10.5 8.6 8.0 8.4 9.6 11.6 14.3 16.5 12.8
    Mean Rain (mm) 17.8 13.9 19.9 36.7 88.6 126.2 146.8 122.0 82.0 40.1 25.0 10.2 727.3
    Mean Rain Days 2.8 2.4 4.7 6.8 11.2 14.6 17.6 15.9 14.5 9.1 5.6 3.4 108.2