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Lake Thun and Interlaken

Alpine lake walls, practical shore diving and the Bernese Oberland above the surface.

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Destination Guide Sources For Lake Thun and Interlaken

Reference links used to build and maintain this guide.

42 sources • Updated Oct 29, 2026

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Oct 29, 2026.

Interlaken Tourism: Merligen on Lake Thun - Official visitor-region evidence for Merligen, Lake Thun dive spots, bathing and regional access.
Dive Center Thunersee: lakeside dive base - Operator evidence for Hilterfingen lakeside base, training, equipment, fills, parking and boat trips on request.
Dive Center Thunersee: air and nitrox filling - Operator cylinder-fill prices, gases and arrangements; check price and eligibility before travel.
Dive Center Thunersee: freediving courses - Current 2026 SSI pool and open-water freediver course offerings, dates and indicative CHF fees.
Dive Center Thunersee: complete SSI freediver course details - Operator explains pool and open-water lessons, prerequisites and skills; old course occurrence is not new availability.
Dive Center Thunersee: snorkeling and try-scuba courses - 2026 operator snorkeling instruction and try-scuba listings; registration deadlines and venue must be checked.
Tauchclub Aarau: regional dive site index - Diver association's Lake Thun shore entries, including training areas, walls and Gunten Bad restriction.
Swiss Divers: Hotel Bellevue, Hilterfingen - Community site profile for relatively accessible instruction-oriented shore dive and vessel awareness.
Swiss Divers: Gunten Enteneck - Community profile describing steep wall and canyon environment requiring appropriate experience.
Swiss Divers: Gunten Bad - Community profile lists seasonal bathing-area dive ban but conflicts on fall date with other dive sources.
Tauchclub Aarau: Gunten Bad record - Community log explicitly reports mid-May to mid-October seasonal diving restriction.
Tauchclub Seetal: Beatenbucht and Fischbalmen - Local club site rules concerning ship traffic, dive flag, restricted use and advanced suitability; old guidance must be reconfirmed.
Swiss Underwater Sport Federation: dive prohibitions and restrictions - National diving federation: confirm up-to-date site-level prohibitions with local contacts; page access has been inconsistent.
Interlaken Tourism: Lake Thun and Brienz lidos - Official permitted bathing overview with signposted exceptions and named lidos on both lakes.
Interlaken Tourism: Faulensee Lido - Official year-round grounds access, free admission and Lake Thun swimming entry; not evidence for guided snorkeling.
Interlaken Tourism: Spiez Lido - Official May-September swimming season, lakeside amenities and seasonal visitor activities.
Interlaken Tourism: getting to the region - Official rail access and confirmed Interlaken West-Ost rail closure from October 19 through December 11, 2026.
Interlaken Tourism: local transport and disruption - Official replacement bus, local road changes and advice to check SBB/BLS journey planner.
Thun-Lake Thun Tourism: PanoramaCard - Official tourist-tax and guest-card eligibility, bus benefits, cruise discount and exclusion of train travel.
BLS: lake cruise day tickets - Operator evidence for scheduled passenger cruises on the lakes; not scuba liveaboards.
Interlaken Tourism: Thun Castle - Year-round castle visit with variable monthly opening hours, indoor museum and views.
Interlaken Tourism: Lake Thun castles - Thun, Schadau, Spiez and Oberhofen cultural options for non-divers.
Switzerland Tourism: Lake Brienz and Giessbach - Official adjacent visitor itinerary of Brienz, Giessbach Falls and Brienzer Rothorn; not scuba evidence.
Interlaken Tourism: water activities on both lakes - Official seasonal kayaking, paddleboarding, swimming and non-diver water-activity options.
Canton Bern: Weissenau-Neuhaus nature reserve - Legal nature-reserve protection: no water entry, swimming, boating, shoreline fishing or leaving marked paths within protected area.
Canton Bern: mandatory vessel cleaning between waters - Mandatory boat reporting and cleaning when moving boats between some Bern lake systems; do not misstate as legal scuba-gear requirement.
Canton Bern: lakes water quality - Canton information on lake-water quality and differing physical character of Thun and Brienz.
Divers Alert Network: altitude diving - Altitude scuba pressure and decompression planning at inland mountain lakes.
Divers Alert Network: medical considerations for drysuit divers - Drysuit training, adequate insulation and medical cold-water considerations.
Spital fmi: emergency services - Hospital-region emergency and referral context for Interlaken/Unterseen; activate 144 for emergencies.
HUG Geneva: hyperbaric medicine program - Illustrates Swiss specialist hyperbaric treatment availability but not proximity to Lake Thun or guaranteed direct admission.
Switzerland Tourism: emergency telephone numbers - Official 112, 144, 1414, 117 and 118 emergency numbers and Swiss electricity basics.
Swiss State Secretariat for Migration: entry information - Nationality-dependent entry and Schengen visa rules.
Swiss State Secretariat for Migration: ETIAS - As of research, ETIAS not operational and no application collection.
Switzerland Tourism: money and shopping - Currency, payment and common visitor spending context.
Switzerland Tourism: visitor costs - Evidence for relatively high Swiss accommodation, dining and visitor costs.
Switzerland Tourism: tipping - Service included and customary optional rounding or tips.
Switzerland Tourism: electricity - 230 V, 50 Hz, Swiss type J with compatible C plugs.
Switzerland Tourism: languages - German-speaking Switzerland and local German-language context.
Switzerland Tourism: WLAN information - Wi-Fi access planning guidance.
Destination hero photo by MartySwissCH (historical) - Lake Thun, Switzerland, viewed from Niesen. Photo: MartySwissCH / Wikimedia Commons. CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0. Cropped and resized. Cropped image retains the same license.
Destination hero photo by Marc Schnau - Lake Thun and the Alps from Schadau Park. Unsplash License (https://unsplash.com/license). Photographer: https://unsplash.com/@marc_schnau. Cropped and resized for the cover.