To keep it short: In summer it is far to hot, you cannot go for a walk when its about 49 or even more degrees. The city of doha offers not much of outddo activities, no wonder since its too hot here, the corniche offers a safe walk along the bay or you can take a jog there. Swimming in the bay is not permitted ! Due to the summer heat you have to stay indoors all the time or in cars with good AC. There are only a few bars offering alcoholic drinks, as the Irish bar in the Sheraton hotel. Qatar is not a country where you may want to spend your holidays ! You may crash your car in the sand dunes or stare at huge towers, there's not much to do here. Only a few, well shielded areas allow swimming as the Sheraton or the Four Seasons Hotel, you may find beaches far away from Doha but you won't stay there long 'cause it's too hot in the sun.