Get rid of stagnant water

Make sure there's no standing water anywhere — on toys left out on the lawn, plates under your flower pots or garbage in an open can. Ponds, kids’ pools and improperly drained yards can also attract mosquitoes. One watery area you
 don't have to worry about, though, is your swimming pool — as long as it's chlorinated and the filter is working, mosquitoes will stay away.

Use coffee

Coffee ground is one of the simple home remedies that can be effective. Pour the coffee ground in any stagnant water in your environment. Once you do that the mosquito eggs in the water will come up to the surface of the water and automatically die due being deprived of oxygen.

Dress appropriately

Wear lightweight, light-colored clothes that hide your arms and legs. Mosquitoes are attracted to dark colors. Summer colours such as white, beige and pretty pastels are ideal!

Use  Lavender Oil

Normally, mosquitoes cannot stand the strong smell of the lavender oil. With that you can keep mosquitoes away by spraying lavender oil in the room. Alternatively you can apply it on the exposed parts of your body.

Don’t forget rosemary too!

Get a few stalks of rosemary and burn them. The smell produced when this plant is burnt will send away the mosquitoes around.

Or...beer!

Mosquitoes don’t like the smell of alcohol. Just place a glass of alcohol in the room. It will keep all the mosquitoes away.

Set out candles or lanterns.

Provide mood lighting  and keep guests comfortable with bug-deterring luminarie. There are candles made of wax containing citronella  that repels mosquitoes. However look also for wax that contains geraniol, a much more effective ingredient than citronella.