Switzerland

Sion

Sion is a landlocked city in the Swiss canton of Valais, set high in the Alps with a strong seasonal tourism and outdoor recreation focus. It is not a coastal diving destination, and local diving activity is extremely limited. Nearby freshwater options exist in the wider region for training and practice, typically within clubs or dedicated facilities, but they are outside the city itself. For divers visiting Switzerland, Sion serves as a gateway to alpine scenery, high-altitude hiking, and nearby lakes and rivers for general water sports rather than destination scuba diving. If you’re after dive-rich experiences, consider closer towns on lakes like Lac Léman or Swiss plateau sites reachable by road or rail, or join a dive center in a nearby larger city for courses and excursions. Keep expectations aligned with the region’s cooler fresh and alpine environment, seasonal access, and limited direct dive opportunities.

Essential information for traveling in Switzerland

About Switzerland

Sea
Adriatic Sea, North Sea, Mediterranean Sea - We...
Timezone
Europe/Zurich
Languages
DE FR IT RM
Demonym
Swiss
Phone prefix
+41

Practicalities

Currency
CHF
Voltage
230
Plug type
Type J, Type C, Type F
Airports
ZRH GVA BSL LUG BRN

Diving specifics

Temperature
°C
Depth units
meters
Pressure
bar
Regulators
DIN Yoke (INT)

Dive sites and dive centers around Sion

Nearby Dive Sites (2)

Nearby Dive Centers (1)

Nearby cities for scuba diving around Sion

The best time to dive in Sion

The best months to dive in Sion are from June to August. Temperatures are confortable (21-24°C), currents are mild and the visibility is at its best.

Excellent Good Fair Mitigated
01 - Jan.
2 °C 6/10
02 - Feb.
3 °C 8/10
03 - Mar.
6 °C 8/10
04 - Apr.
11 °C 7/10
05 - May
15 °C 7/10
06 - Jun.
24 °C 8/10
07 - Jul.
21 °C 7/10
08 - Aug.
23 °C 7/10
09 - Sept.
17 °C 6/10
10 - Oct.
12 °C 6/10
11 - Nov.
7 °C 7/10
12 - Dec.
5 °C 8/10

Based on last year's weather. Scores compare months for this destination only and are indicative. A mitigated month may still suit many divers.

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