| Climate | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Daily highs °C | 20 | 22 | 22 | 27 | 35 | 37 | 41 | 41 | 38 | 32 | 28 | 24 |
| Nightly lows °C | 4 | 7 | 10 | 12 | 17 | 20 | 23 | 23 | 21 | 16 | 10 | 9 |
| Siwa has a typical desert climate. It is extremely hot in the summer months and quite cold in winter nights. |
From Alexandria
There are regular buses from Alexandria, leaving at 8am, 11am and 3pm, air-conditioned and with modest prices. Journey time 9 hrs. The bus stops three times so you can buy a cup of tea and use the very basic toilets.
From Cairo
The West Delta Bus Station is the city's main transportation hub and is located near town's main square, up the street from the bank. Buses to Marsa Matruh and continuing to Alexandria leave three times daily at 10:00am, 5:00pm, and 10:00pm. Booking ahead is well advised.
There are direct night buses from Cairo Gateway Bus Station to Siwa, leaving daily at 7:45pm and costing 60LE. These buses return to Cairo daily, leaving at around 8pm.
To reach Siwa from Cairo on days not serviced by the direct bus, or to reach Siwa from Alexandria, catch a bus or shared taxi to Marsa Matruh, costing 25LE-35LE. From Marsa Matruh, buses run to Siwa daily at 1:30pm and 4:00pm, costing an additional 20LE.
From Bahariyya
There is no bus service from Siwa to Bahariyya. The road to/from the Bahariyya Oasis is in bad shape and must be driven by a 4x4. Drivers will make the journey when they have enough passengers, for a price starting from 1200LE per vehicle. One must try to negotiate a bit and look for other passengers to share the price.
By taxi
Shared taxi service is erratic, but is available between Siwa and Marsa Matruh costing 20LE+++. The shared taxis arrive/depart in front of Abdu's Restaurant across from the Yousef Hotel. Confirming in advance is highly recommended.
Siwa is 752 km from Cairo, 960 km from Kharga Oasis, 760 km from Dakhla Oasis, 530 km from El Farafra Oasis and 350 km from Bahariyya Oasis.
From Marsa Matruh
Busses leave Marsa Matruh at 7am and arrive at Siwa at 11am.