Cairo in July and August: 95–100°F days, 75°F nights. Tolerable with early starts and afternoon downtime. Luxor and Aswan: 105–115°F days. We don't run multi-day southern itineraries in July and August – it isn't a holiday at that temperature, it's an endurance event. Red Sea coast: 95–100°F, but the water is 84°F and you spend most of it in or on it.

Possible, not advisable for first-time visitors. The cabin AC is excellent, the deck pool is welcome, but every shore excursion – Karnak, Valley of the Kings, Edfu, Kom Ombo – is outdoors in 110°F shade. The 6am starts are mandatory and the experience suffers. We will book August Nile cruises for repeat clients who knew Egypt cool and want to see it hot. We discourage them for anyone else.

Microclimate. The coast sits in a dry-heat band moderated by the sea breeze and the proximity to deep water. Diurnal range is smaller, humidity is lower than Cairo, and the underwater temperature stays in the 79–85°F range year-round. Egyptian families fly to Hurghada and Sharm in July and August for exactly the same reason Americans drive to the coast.

10–15°F cooler than Cairo on the same day, sea breeze most afternoons, Mediterranean light. The city does its own summer thing – corniche cafés, late dinners, the Bibliotheca Alexandrina, day trips out to Montaza. Three nights as a Cairo add-on is the right shape; pure-Alexandria isn't enough to fly for, but the combination is properly nice.

If you can, yes. October is when Egypt re-opens for the high season – temperatures drop into the 80s in Upper Egypt, the cruise schedule comes back fully, and the temple light is usable again. If you can shift dates, we'll usually steer you there. If you can't, the summer trip we'd recommend is Red Sea plus Cairo evenings plus possibly Alexandria – not Luxor, not Aswan, not the Nile cruise.