Is it safe to travel to Turkey at this time (August 2013)?

The Australian government has a great Travel Advisory site, with information on each page. Generally they're slightly over-protective, but that's arguably a good thing. Their current status for Turkey is to exercise a high degree of caution, but they're not at the stage where you need to reconsider your need to travel yet, unless you're crossing or near the borders with Syria, Iraq or Iran:

• We advise you to exercise a high degree of caution in Turkey because of the high threat of terrorist attack.
• Pay close attention to your personal security at all times and monitor the media for information about possible new safety or security risks.
• Terrorist attacks can occur anywhere at any time in Turkey. In recent years, terrorist attacks have occurred in tourist areas and locations frequented by foreigners. Foreigners have been killed and injured.
• On 1 February 2013 an explosion outside the US Embassy in Ankara killed two people. The Turkish Government has warned that the group claiming responsibility for bombing the US Embassy is planning further attacks.
• Since late May 2013, demonstrations have taken place in major cities in Turkey (Istanbul, Ankara, Izmir, Antalya and Adana). Protests have generally formed and intensified during the weekends. Clashes between the protestors and the police have occurred. Police have used tear gas, pepper spray and water cannons in response. Australians should avoid all demonstrations as they may turn violent. See Safety and security: Civil unrest/political tension for more information.
• You should avoid protests and demonstrations throughout Turkey as they may become violent.
• Terrorists have in the past mounted attacks on significant dates and anniversaries. The tourist season during Turkey's spring and summer months has also traditionally been marked by increased terrorist attacks. See the Terrorism section below for a list of possible targets and a list of significant dates.
• The unauthorised sale and exportation of antiquities is prohibited and carries long jail sentences. You need a receipt and an official certificate to export these items legally.
• When travelling to the Gallipoli Peninsula Peace Park, be prepared for the variable climatic conditions (i.e. summer, winter and wet weather protective clothing, even in winter a hat/cap and sunscreen are essential to ensure your wellbeing and comfort); strictly obey safety signage and directions; and do not wander off marked roads and tracks within the Park. If travelling as part of a tour group do not separate from the group and wander the park alone. For further information see under Local travel.
• We advise you to reconsider your need to travel to provinces in the south-east of Turkey, including those bordering Syria, Iraq and Iran, due to the high threat of terrorist attack and the unpredictable security situation. On 11 May 2013, car bombings in the town of Reyhanli in Hatay province, close to Turkey’s border with Syria, killed at least 40 people and injured around 100 others. If you do decide to travel to these areas, you should exercise extreme caution.

Ultimately it's up to you, but it's also highly important to check with your travel insurance company and ensure they're still covering travel to Turkey given its increased risk, and whether they have any restrictions.

I am from Turkey . I am living in istanbul .I think safe to travel to istanbul. You can visit . Just haven't active protests. if you go Taksim in istanbul , you have to be careful. Because there is have some protest sometimes . if you need something get in touch.