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#911344 - 18/12/2010 22:43 Which has better summer weather: Sydney or Perth?
Dr Philosophy Online   content
Weather Freak

Registered: 26/07/2009
Posts: 154
Loc: Campbelltown, NSW
I thought this would make an interesting debate. wink

It is common knowledge that Sydney has lower average maximum temperatures than Perth during the summer months, and that Sydney has, on average, a higher rainfall than Perth, no matter whether it's annual or just during summer.

But there are following points to consider:

* Despite having the lower maximum temperatures of the two cities, and therefore having fewer hot days (depending where in the metro area you are), Sydney has more humid days than Perth, which can be quite uncomfortable.

* Despite having higher maximum temperatures of the two cities, and therefore having more hot days than Sydney, Perth generally has dry heat (therefore, less humid days than Sydney), which makes it more bearable than a humid day in Sydney, even when temps are at around 30-35C, possibly slightly beyond.

I guess it can be said that during the summer, Sydney's weather is really only bearable in the coastal & harbourside suburbs, where the seabreezes help keep the temps down, as well as reducing the discomfort from the high DPs (around 18-19C upwards). As for Perth, living close to the coastline of the Indian Ocean is more advantageous than further inland, mainly thanks to the "Fremantle Doctor" cooling the (especially) coastal suburbs down during the summer afternoons.

Climate stats from the BOM:
* Sydney (Observatory Hill) [1981-2010 period]
* Perth Metro (Mt Lawley)
* Swanbourne (Coastal Perth)

I know that opinions will vary from person to person, but which of the two cities mentioned have a better summer weather, especially in terms of comfort, and why?

I'll be interested to hear people's views on this debate. smile

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#911351 - 18/12/2010 23:06 Re: Which has better summer weather: Sydney or Perth? [Re: Dr Philosophy]
Turtle Girl Offline
Weather Freak

Registered: 21/04/2007
Posts: 319
Loc: Melbourne CBD
I lived in Sydney for 28 years and the answer is undoubtedly Perth. In my mind summer is sunshine. Hats off to Perth in that department, its pretty hard to beat on that front!

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#911434 - 19/12/2010 08:40 Re: Which has better summer weather: Sydney or Perth? [Re: Turtle Girl]
Canberra's Weather Offline
Weatherzone Addict

Registered: 11/11/2005
Posts: 1141
Loc: Canberra
The sun does shine in winter too, doesn't it? Summer is all about high temperatures if you ask me. The only difference is the number of daylight hours, which is not really that much different compared to the northern parts of Sweden, or even Great Britain.

Sydney is the lesser of the 2 evils. Perth has built quite a reputation for its stifling and extraordinarily long heatwaves over the last couple of years.
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#911498 - 19/12/2010 10:56 Re: Which has better summer weather: Sydney or Perth? [Re: Canberra's Weather]
Dr Philosophy Online   content
Weather Freak

Registered: 26/07/2009
Posts: 154
Loc: Campbelltown, NSW
Originally Posted By: Canberra's Weather

Sydney is the lesser of the 2 evils. Perth has built quite a reputation for its stifling and extraordinarily long heatwaves over the last couple of years.


That's a good point there, CW.

In most cases, whenever the western suburbs of Sydney has days of when temps are in the mid to high 30s & even into the 40s, the coastal suburbs, more often than not, escapes the heat, thanks to the seabreezes that cool the temps down. On the other hand, in Perth, whenever a hot day occurs, both inland & coastal suburbs suffer from the heat quite often, unless the "Fremantle Doctor" spares the coastal suburbs from the heat sooner rather than later.
For example, at 3pm on 25th February this year, Mt Lawley (where Perth Metro weather station is) recorded 40.8C with winds coming from the ENE, while at the same time, Swanbourne recorded 34.9C with winds coming from the SSW. That is a good example of the effects the "Fremantle Doctor" can have on Perth's coastal suburbs.

For comparative purposes, in Sydney on 22nd January this year, Observatory Hill recorded 29.2C at 3pm that day, while just 13km further west at Sydney Olympic Park (Homebush Bay) at the same time, it was 40.2C. That temp at Observatory Hill being significantly lower than that of Homebush Bay was thanks to the Easterly seabreezes that helped keep the heat away from the coastal & harbourside suburbs of Sydney.

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#911786 - 19/12/2010 20:12 Re: Which has better summer weather: Sydney or Perth? [Re: Dr Philosophy]
Vinnie Offline
Meteorological Motor Mouth

Registered: 17/05/2006
Posts: 6525
Loc: Mulambin , Yeppoon Central Qld
Perth.

Today for example it is now 28.7 with an app temp of 23.7 and humidity around 21 percent. dew point of 3.5

No seabreeze here for a while ...possibly back end of the week

Sydney has a dew point now of 17 , humidity is now 81 percent.

Isn't it obvious ?



Edited by vinny06 (19/12/2010 20:15)
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#911792 - 19/12/2010 20:27 Re: Which has better summer weather: Sydney or Perth? [Re: Vinnie]
Dr Philosophy Online   content
Weather Freak

Registered: 26/07/2009
Posts: 154
Loc: Campbelltown, NSW
Originally Posted By: vinny06
Perth.

Today for example it is now 28.7 with an app temp of 23.7 and humidity around 21 percent. dew point of 3.5

No seabreeze here for a while ...possibly back end of the week

Sydney has a dew point now of 17 , humidity is now 81 percent.

Isn't it obvious ?


To be fair, Sydney is currently overcast and raining, and therefore has a lower temperature, which still makes it comfortable, despite the relatively high DP.

Looking at the 7-day forecast just now, Perth's maximum temp for Christmas Day is expected to be 38C, while in Sydney, it is expected to be 26C with cloudy & isolated showers expected.

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#912032 - 20/12/2010 10:39 Re: Which has better summer weather: Sydney or Perth? [Re: Dr Philosophy]
Vinnie Offline
Meteorological Motor Mouth

Registered: 17/05/2006
Posts: 6525
Loc: Mulambin , Yeppoon Central Qld
It is overcast and raining in Perth, in December !!! Dew point is still on 13.2

Sydney at the moment (7.40am - 10.40 sydney time) actually now has a lower humidity and dew point than Perth 2 dew point, 35 percent humidity.

What the ?


Edited by vinny06 (20/12/2010 10:40)
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#912295 - 20/12/2010 22:10 Re: Which has better summer weather: Sydney or Perth? [Re: Dr Philosophy]
gleno71 Offline
Weatherzone Addict

Registered: 09/11/2007
Posts: 1633
Loc: Australia
Originally Posted By: Dr Philosophy
Originally Posted By: Canberra's Weather

Sydney is the lesser of the 2 evils. Perth has built quite a reputation for its stifling and extraordinarily long heatwaves over the last couple of years.


That's a good point there, CW.

In most cases, whenever the western suburbs of Sydney has days of when temps are in the mid to high 30s & even into the 40s, the coastal suburbs, more often than not, escapes the heat, thanks to the seabreezes that cool the temps down. On the other hand, in Perth, whenever a hot day occurs, both inland & coastal suburbs suffer from the heat quite often, unless the "Fremantle Doctor" spares the coastal suburbs from the heat sooner rather than later.
For example, at 3pm on 25th February this year, Mt Lawley (where Perth Metro weather station is) recorded 40.8C with winds coming from the ENE, while at the same time, Swanbourne recorded 34.9C with winds coming from the SSW. That is a good example of the effects the "Fremantle Doctor" can have on Perth's coastal suburbs.

For comparative purposes, in Sydney on 22nd January this year, Observatory Hill recorded 29.2C at 3pm that day, while just 13km further west at Sydney Olympic Park (Homebush Bay) at the same time, it was 40.2C. That temp at Observatory Hill being significantly lower than that of Homebush Bay was thanks to the Easterly seabreezes that helped keep the heat away from the coastal & harbourside suburbs of Sydney.



How come the Sydney seabreeze is more effective than the Perth seabreeze?? Boths cities are on the coastal fringe.

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#912690 - 22/12/2010 02:21 Re: Which has better summer weather: Sydney or Perth? [Re: gleno71]
Vinnie Offline
Meteorological Motor Mouth

Registered: 17/05/2006
Posts: 6525
Loc: Mulambin , Yeppoon Central Qld
Unpleasant now 18 deg dewpoint and it is forecast for most of the week to be humid as the trough is inland.
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#913896 - 24/12/2010 09:58 Re: Which has better summer weather: Sydney or Perth? [Re: Vinnie]
Vinnie Offline
Meteorological Motor Mouth

Registered: 17/05/2006
Posts: 6525
Loc: Mulambin , Yeppoon Central Qld
Does anyone know ( I think I was wrong about the trough)

1. Why the dew point in Perth today is 21 deg and 23 in Mandurah. Something to do with rain being inland ?

2. Is this normal each year to get the odd day or so like this.

3. When (how long before ) it will return to normal (dry heat lower dew point).

I have never remembered dew points of 21 in Perth !.


Edited by vinny06 (24/12/2010 10:00)
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