Youngsters Fikayo Tomori and Mukhtar Ali both signed new long-term contracts.

On 2 August, Baba Rahman returned to the Bundesliga on a season-long loan with Schalke 04 after failing to impress Conte during the pre-season.
Although Roma announced the signing Mohamed Salah back in October 2015, on 3 August Chelsea finalised the move for an additional €15 million.
On 5 August, Abraham signed for Championship side Bristol City on a season-long loan, with no recall clause and Papy Djilobodji joined Sunderland for a fee reported to be in the region of £8 million.
On 6 August, Houghton joined Doncaster Rovers on loan until 3 January 2017.

On 3 August, in its U.S. tour, Chelsea defeated Milan 3–1.
Chelsea concluded its pre-season campaign with a 4–2 victory over Werder Bremen.

On 12 August, Bertrand Traoré signed a new three-year contract.
He then joined Ajax on loan for the season while Danilo Pantić joined Excelsior on loan.
On 14 August 2016, Michael Hector joined German side Eintracht Frankfurt on a season-long loan.
On 15 August 2016, goalkeeper Jamal Blackman joined League Two side Wycombe Wanderers on loan until 3 January 2017, while Isaiah Brown joined Rotherham United on loan until the end of the 2016–17 season.
On 23 August, Marko Marin joined Greek side Olympiacos on a three-year deal for a fee thought to be in the region of £3 million.
On 25 August 2016, Eduardo joined Chelsea on free transfer, signing a one-year deal.
On 27 August, Mario Pašalić joined Milan on a season-long loan.

On 30 August, strikers Patrick Bamford and Loïc Rémy joined Burnley and Crystal Palace respectively on season-long loans.
Later in the day, Kenedy was also confirmed to have left on a season-long loan deal, to Watford.

Chelsea started its Premier League season with a 2–1 win over London rivals West Ham United, with goals scored by Eden Hazard and Diego Costa.
In its second league game, Chelsea left it late yet again, scoring two late goals in the second half to earn their first away win of the season over Watford.
Chelsea continued its winning streak after beating Bristol Rovers to advance to the third round of the EFL Cup.

On 27 August, in the 3–0 home victory over Burnley, goalkeeper Thibaut Courtois kept the first clean sheet of the season and broke a run of 13 home Premier League games without a clean sheet, with their last being in a 1–0 win over Norwich City in November 2015.
In the month of August, Chelsea earned all nine available points and was in second place of the Premier League.
Youngsters Fikayo Tomori and Mukhtar Ali both signed new long-term contracts.
On 2 August, Baba Rahman returned to the Bundesliga on a season-long loan with Schalke 04 after failing to impress Conte during the pre-season. Although Roma announced the signing Mohamed Salah back in October 2015, on 3 August Chelsea finalised the move for an additional €15 million. On 5 August, Abraham signed for Championship side Bristol City on a season-long loan, with no recall clause and Papy Djilobodji joined Sunderland for a fee reported to be in the region of £8 million. On 6 August, Houghton joined Doncaster Rovers on loan until 3 January 2017.
On 3 August, in its U.S. tour, Chelsea defeated Milan 3–1. Chelsea concluded its pre-season campaign with a 4–2 victory over Werder Bremen.
On 12 August, Bertrand Traoré signed a new three-year contract. He then joined Ajax on loan for the season while Danilo Pantić joined Excelsior on loan. On 14 August 2016, Michael Hector joined German side Eintracht Frankfurt on a season-long loan. On 15 August 2016, goalkeeper Jamal Blackman joined League Two side Wycombe Wanderers on loan until 3 January 2017, while Isaiah Brown joined Rotherham United on loan until the end of the 2016–17 season. On 23 August, Marko Marin joined Greek side Olympiacos on a three-year deal for a fee thought to be in the region of £3 million. On 25 August 2016, Eduardo joined Chelsea on free transfer, signing a one-year deal. On 27 August, Mario Pašalić joined Milan on a season-long loan.
On 30 August, strikers Patrick Bamford and Loïc Rémy joined Burnley and Crystal Palace respectively on season-long loans. Later in the day, Kenedy was also confirmed to have left on a season-long loan deal, to Watford.
Chelsea started its Premier League season with a 2–1 win over London rivals West Ham United, with goals scored by Eden Hazard and Diego Costa. In its second league game, Chelsea left it late yet again, scoring two late goals in the second half to earn their first away win of the season over Watford. Chelsea continued its winning streak after beating Bristol Rovers to advance to the third round of the EFL Cup.
On 27 August, in the 3–0 home victory over Burnley, goalkeeper Thibaut Courtois kept the first clean sheet of the season and broke a run of 13 home Premier League games without a clean sheet, with their last being in a 1–0 win over Norwich City in November 2015. In the month of August, Chelsea earned all nine available points and was in second place of the Premier League.
2016–17 Chelsea F.C. season