Rostock has a maritime temperate climate (Köppen Cfb) shaped by the Baltic Sea, which moderates temperature extremes year-round. Winters are cool but rarely severe, summers are mild, and rainfall is spread evenly across all months. The city averages 600mm of precipitation annually with about 1,700 sunshine hours. Baltic Sea water temperatures peak at 18-19°C (64-66°F) in August and drop to 2-3°C (36-37°F) in February. For more on this, read our best time to visit Rostock guide.
Rostock Weather in January
January is Rostock’s coldest month. Average high temperatures reach 3°C (37°F), with overnight lows around -1°C (30°F). The Baltic Sea temperature hovers at 2-3°C (36-37°F). You can expect about 15 days with some precipitation, totaling roughly 45mm of rain and occasional light snow. Sunshine is limited to about 45 hours for the entire month. Days are short, with the sun setting before 4:30 PM in early January. Ice on the Warnow River is possible but not guaranteed every winter. The Warnemünde beach promenade sees few visitors, and many seasonal cafes close until spring. For more on this, read our things to do in Rostock guide.
Rostock Weather in February
February remains cold but begins to show small signs of change. Daytime highs average 4°C (39°F) with lows around -1°C (30°F). Precipitation drops slightly to about 35mm across 13 days. The Baltic Sea stays cold at 2°C (36°F). Sunshine increases marginally to 65 hours for the month, with sunset pushing past 5:30 PM by late February. Snow is still possible but typically light, with most precipitation falling as cold rain. The extra daylight brings a few more visitors to Warnemünde on sunny weekends, though beach weather is still months away. For more on this, read our Rostock events and festivals guide.
Rostock Weather in March
March marks the meteorological start of spring, with average highs climbing to 8°C (46°F) and lows to 1°C (34°F). The Baltic Sea remains cold at 3-4°C (37-39°F). Precipitation is moderate at 40mm over 14 days, with rain replacing snow as the dominant form. Sunshine jumps to about 120 hours, and daylight extends past 7 PM by late March after the clocks spring forward. Cherry trees and early bulbs start blooming in the city’s parks. Wind is a factor near the coast, with Warnemünde frequently seeing fresh Baltic breezes of 20-30 km/h. Outdoor cafes begin reopening, though scarves and jackets remain essential. For more on this, read our Rostock neighborhoods guide.
Rostock Weather in April
April brings noticeably warmer days with average highs of 12°C (54°F) and lows of 4°C (39°F). Precipitation totals about 40mm across 13 days, often falling as quick showers between sunny spells. The Baltic Sea slowly warms to 6°C (43°F) , still too cold for swimming but pleasant for beach walks. Sunshine nearly doubles from March to approximately 180 hours. The Warnemünde beach chairs (Strandkörbe) are set out by mid-April, and the promenade cafes fill on warm afternoons. It is a classic shoulder month: some days feel genuinely warm (16-18°C), while others bring chilly Baltic wind. Pack layers and a waterproof jacket. For more on this, read our where to stay in Rostock guide.
Rostock Weather in May
May is one of Rostock’s most pleasant months. Daytime highs average 17°C (63°F) with lows of 8°C (46°F). Rainfall is the year’s lowest at about 35mm over 12 days, and sunshine climbs to around 240 hours , the sunniest month alongside June. The Baltic Sea warms to 10°C (50°F), still chilly for swimming but refreshing for a quick dip. Trees are in full leaf, and the city’s parks and the Rostock Heath (Rostocker Heide) are at their greenest. It is an excellent month for cycling the coastal paths and exploring the old town on foot. Evenings remain cool, so bring a jacket. The Warnemünde beach season unofficially begins in late May. For more on this, read our Rostock travel tips guide.
Rostock Weather in June
June delivers the longest days of the year and the most sunshine at about 240 hours. Average highs reach 20°C (68°F) with lows of 12°C (54°F). The Baltic Sea warms to 15°C (59°F), making swimming possible for those who do not mind cool water. Precipitation increases slightly to about 55mm over 14 days, often as brief afternoon thunderstorms. The sun rises before 4:45 AM and sets after 9:45 PM around the solstice, giving nearly 17 hours of daylight. Warnemünde beach is busy on sunny weekends, and outdoor restaurants in the old town fill every terrace. Rain can arrive suddenly, so keep a light rain jacket handy even on clear mornings. For more information, see our Rostock travel guide.
Rostock Weather in July
July and August are Rostock’s warmest months. Average highs hit 22°C (72°F), with occasional peaks of 28-30°C (82-86°F) during warm spells. Lows average 14°C (57°F). The Baltic Sea reaches 17-18°C (63-64°F), its most swimmable temperature. Rainfall totals about 65mm over 15 days, making it one of the wetter months despite the warm temperatures. Thunderstorms are common in the afternoon after hot mornings. Sunshine drops slightly to about 220 hours. The Warnemünde beach (nicknamed the “bathtub of the Baltic”) is at peak season, with Strandkörbe rented out daily. Book accommodation well in advance for July visits, especially during Warnemünde Week in early July. Mosquitoes can be active near the Warnow River in the evenings.
Rostock Weather in August
August matches July for warmth, with average highs of 22°C (72°F) and lows of 14°C (57°F). The Baltic Sea peaks at 18-19°C (64-66°F), the warmest water of the year. Rainfall is about 65mm over 14 days, similar to July, with afternoon thunderstorms remaining common. Sunshine decreases modestly to about 210 hours as the days gradually shorten. The first two weeks of August are peak holiday season across Germany, so hotels and restaurants are at their busiest. The annual Hanse Sail festival in early August brings hundreds of tall ships and over a million visitors to the city , if you are not attending the festival, avoid this week. By late August, the crowds thin slightly, and the weather remains warm enough for beach days.
Rostock Weather in September
September feels like a gentle transition toward autumn. Average highs drop to 18°C (64°F), with lows of 11°C (52°F). The Baltic Sea holds summer warmth at 16°C (61°F) early in the month, cooling to 14°C (57°F) by late September. Rainfall totals about 55mm over 13 days. Sunshine drops to about 160 hours, but early September often brings stretches of golden weather known in Germany as Altweibersommer (Indian summer). The Warnemünde beach remains pleasant through mid-September, and the crowds thin considerably after the first week. It is one of the best months for exploring the old town on foot without summer heat. Evenings require a warm layer by late September.
Rostock Weather in October
October brings crisp autumn days. Average highs fall to 13°C (55°F), with lows of 7°C (45°F). The Baltic Sea cools to about 12°C (54°F). Precipitation increases to about 50mm over 15 days, and grey overcast days become more frequent. Sunshine drops sharply to around 100 hours for the month. The autumn foliage along the Warnow River and in the Rostock Heath reaches peak color in mid to late October. Strong Baltic storms can arrive, with wind gusts over 60 km/h not unusual along the Warnemünde seafront. The Strandkörbe are packed away by late October. Daylight saving time ends in late October, with sunset before 5 PM. Pack a warm waterproof coat and sturdy shoes for wet leaves on cobblestones.
Rostock Weather in November
November is Rostock’s greyest and wettest month. Average highs are 7°C (45°F) with lows of 3°C (37°F). The Baltic Sea temperature drops to 8°C (46°F). Precipitation totals about 55mm over 17 days, often as persistent drizzle. Sunshine is scarce at around 50 hours , many days are overcast from dawn to dusk. Daylight shrinks to about 8.5 hours by late November. First frost usually arrives but snow is uncommon. The Warnemünde beach promenade is quiet except for bundled-up dog walkers. Christmas markets in the old town open in late November, bringing some cheer to the dark afternoons. Warm waterproof boots and a windproof coat are essential. Indoor attractions like the Rostock Cultural History Museum become the focus.
Rostock Weather in December
December brings winter proper. Average highs reach 4°C (39°F) with lows around 0°C (32°F). The Baltic Sea cools to about 5°C (41°F). Precipitation totals about 50mm over 17 days, with a mix of cold rain and occasional wet snow , significant snow accumulation is rare in the city centre but more likely inland toward Rostock-Laage. Sunshine bottoms out at about 35 hours, making it the darkest month. Sunset arrives before 3:50 PM in mid-December. The Christmas markets light up the historic squares with mulled wine (Glühwein) and roasted almonds, drawing locals despite the cold. New Year’s Eve fireworks over the Warnow River attract crowds to the Stadthafen. The Warnemünde beach is deserted, though the lighthouse and fish restaurants along the Alter Strom canal stay open year-round.
Rostock Weather by Month: Quick Reference Table
| Month | Avg High (°C) | Avg Low (°C) | Rain (mm) | Rain Days | Sun (hrs) | Sea Temp (°C) |
|---|---|---|---|---|---|---|
| Jan | 3 | -1 | 45 | 15 | 45 | 2-3 |
| Feb | 4 | -1 | 35 | 13 | 65 | 2 |
| Mar | 8 | 1 | 40 | 14 | 120 | 3-4 |
| Apr | 12 | 4 | 40 | 13 | 180 | 6 |
| May | 17 | 8 | 35 | 12 | 240 | 10 |
| Jun | 20 | 12 | 55 | 14 | 240 | 15 |
| Jul | 22 | 14 | 65 | 15 | 220 | 17-18 |
| Aug | 22 | 14 | 65 | 14 | 210 | 18-19 |
| Sep | 18 | 11 | 55 | 13 | 160 | 14-16 |
| Oct | 13 | 7 | 50 | 15 | 100 | 12 |
| Nov | 7 | 3 | 55 | 17 | 50 | 8 |
| Dec | 4 | 0 | 50 | 17 | 35 | 5 |
