Nynäshamn tide times

Nynäshamn sits at the southern tip of the Nynäs peninsula on the Baltic coast of Södermanland, roughly 60 km south of Stockholm. It marks the southern terminus of the Stockholm commuter rail (pendeltåg line 43), making it the most southerly point in Sweden reachable from Stockholm's T-Centralen metro hub without changing to a regional train. The town is primarily known as the ferry port for Destination Gotland — the catamaran and conventional ferry service to Visby on Gotland — with the fast catamaran covering the 150 km crossing in approximately 3 hours and conventional ferries in about 5.5 hours. Ferry frequency peaks in summer, with 4–6 daily departures in July.

The Baltic is essentially non-tidal at Nynäshamn. Astronomical range is approximately 0.15–0.2 m. Sea level variation here is dominated by the same meteorological forcing as the rest of the Swedish Baltic coast: wind setup (a westerly blowing across the Baltic from the Polish or German coast can raise Nynäshamn sea level 0.3–0.4 m within 12–24 hours), barometric pressure, and Baltic seiches. SMHI maintains a water level observation station at Nynäshamn (station code NYN), with continuous records and short-range forecasts published at smhi.se. For ferry operations, sea level is relevant primarily for roll-on/roll-off clearance at the ferry ramps — the berths are designed for the typical ±0.3 m meteorological sea level range, and ferry operations are suspended only in extreme storm surge conditions.

The Nynäshamn harbour area includes a commercial port, a marina (Nynäshamn Segelsällskap), and a small guest harbour. The marina basin has an approach depth of approximately 2.5–3.5 m in the main channel, with shoaling in the inner basin to 1.5–2.0 m. With Baltic meteorological sea level variation of ±0.3 m, vessels drawing 1.8 m should check the SMHI current observation before entering the inner basin at times when prolonged northeasterly winds have been drawing water away from the coast.

The ferry port is the primary visitor draw. The Destination Gotland terminal is approximately 500 m north of the railway station; most passengers arrive by pendeltåg and walk or take a shuttle to the ferry. The journey time from T-Centralen in Stockholm is approximately 1 hour by direct train. Cyclists are a significant portion of summer ferry passengers — Gotland's flat terrain and quiet roads make it popular for cycling holidays — and the ferry loading sequence accommodates bikes without reservation on most sailings.

Nynäshamn's coastline south of the marina transitions into the outer archipelago character: skerries, granite shelving into the Baltic, pine forest to the water's edge. Kayakers use Nynäshamn as a staging point for multi-day trips into the southern archipelago and toward the Landsort lighthouse (Sweden's southernmost lighthouse, on the island of Öja, 25 km southwest). The passage from Nynäshamn to Landsort involves open Baltic crossings of 3–5 km in places with no shelter, where weather-driven sea level variation and swell are the primary hazards, not tide.

TideTurtle displays Open-Meteo Marine sea level data for Nynäshamn. Astronomical tidal range is approximately 0.15–0.2 m; meteorological variation can reach ±0.4 m. Open-Meteo Marine accuracy is typically ±45 minutes on timing and ±0.2–0.3 m on height. SMHI station NYN at smhi.se is the authoritative source for Nynäshamn water level.