For most visitors, plan scuba diving from May to October. July and August are the most comfortable for Baltic shore days, when near-surface water can reach 17°C to 21°C in good weather. If you care more about visibility than warmth, spring and autumn can be excellent for lakes and quarries, before or after peak algae season. Build a flexible plan so you can swap a windy coast day for an inland dive at Car Wrecks Hemmoor and still get in the water.

Snorkeling is best in July and August, when sheltered bays and lakes have the highest chance of comfortable water. Aim for near-surface temperatures around 18°C to 21°C, choose calm mornings, and stay close to shore. The Baltic around Campingplatz Wallnau Fehmarn is a practical base for summer swim days. In June and September you can still have good sessions with a wetsuit, but outside that window most travelers prefer topside water activities instead.

It depends on region, month, and depth. In summer, the Baltic and many lakes can feel mild near the surface, roughly 15°C to 21°C in good conditions. But deep lake layers often sit near 4°C to 8°C year-round, so you can hit a sharp thermocline on a single descent. In winter and early spring, expect water closer to 1°C to 8°C and plan for cold wind on the surface too. Always dress for the coldest part of the dive, not the warmest.

A drysuit is not mandatory everywhere, but it is the most flexible choice for Germany. Many dives involve cold layers near 4°C to 8°C, even when the surface is warmer, and a drysuit makes spring and autumn trips far more enjoyable. If you only dive in July and August and keep profiles shallow, some divers choose a warm wetsuit instead. Whatever you wear, plan for wind and cold during surface intervals, and bring warm layers for the drive back from the site.

Use weather and goals to decide. The Baltic is ideal when winds are light and you want saltwater variety, easy shore entries, and wreck-style dives, for example around Campingplatz Wallnau Fehmarn. Inland lakes and quarries are the reliability play: they are often diveable when the coast is choppy, and they are great for training, photos, and repetition, like Car Wrecks Hemmoor. A smart plan books lodging that lets you pivot between the two.

Walchensee is typically reached via Munich (MUC) as the main gateway, then a drive into the Bavarian pre-Alps. Plan for quick depth changes and thermoclines: even in summer, deeper layers can feel near 4°C to 8°C. For an easy reference site, start at Walchensee, Am Hackl (VW Kaefer), where an attraction sits around 10 m. The entry is commonly done from a large parking area about 2 km past the toll station toward Jachenau. Arrive early on weekends, and pack warm clothes for post-dive time.

Hemmoor is an inland quarry-style destination that many divers use as a primary plan or a weather backup. Fly into Hamburg (HAM) or take rail to northern Germany, then drive to the site. Conditions are often more predictable than the coast, making it great for buoyancy, navigation, and camera practice. Use Car Wrecks Hemmoor as your planning anchor and confirm day-pass rules, opening hours, and what is included (fills, weights, rentals). Bring lights and a conservative mindset for silt and depth.

Visibility is highly variable and seasonal. In wind-stirred coastal water, it can drop to 2 m to 5 m, while managed quarries can deliver 10 m to 20 m on good days. Natural lakes often look best outside peak algae season, and many divers chase spring and autumn windows for clearer water. Bring a light year-round, keep buddy spacing tight in low vis, and use simple navigation patterns. If predictable visibility is your priority, base your trip around quarry-style sites like Car Wrecks Hemmoor.

Treat wrecks as heritage sites: do not remove artifacts, do not disturb structures, and avoid penetration unless you are trained, equipped, and the site allows it. Some wrecks are considered war graves or protected cultural heritage, and local operators may set strict rules. Fishing lines and nets can be a real hazard, so carry a cutting tool and keep a conservative profile. If you want the feeling of a wreck dive with simpler logistics, many inland sites feature placed objects and attractions, including at Car Wrecks Hemmoor.

For any life-threatening situation, call 112 first for ambulance and emergency services. For maritime emergencies at sea, contact MRCC Bremen and follow marine VHF distress procedures if you are on a boat. For dive medicine coordination and chamber referral, contact a diving medical assistance provider such as DAN as soon as the situation is stable. Save key numbers in your phone before you travel, and carry your insurance details and dive computer data in your kit. In remote areas, agree on an evacuation plan with your buddy before entering the water.