Most visitors pack for Helsinki's cold and forget the sauna. Public saunas like Löyly and Allas Sea Pool are a core part of the city, and they mean a swimsuit and a dry bag for wet kit, even in January. Pack for the sea wind and the sauna, and the cold looks after itself.
Helsinki weather by month
Daily high and low (°C), and days with rainSee the numbers
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High | -1°C30°F | -1°C30°F | 3°C37°F | 8°C46°F | 14°C57°F | 19°C66°F | 21°C70°F | 20°C68°F | 17°C63°F | 10°C50°F | 5°C41°F | 1°C34°F |
| Low | -6°C21°F | -5°C23°F | -3°C27°F | 1°C34°F | 6°C43°F | 11°C52°F | 15°C59°F | 14°C57°F | 12°C54°F | 5°C41°F | 1°C34°F | -3°C27°F |
| Rain days | 15 | 10 | 12 | 11 | 8 | 13 | 15 | 15 | 11 | 12 | 14 | 15 |
Season by season
Winter
December–FebruaryJanuary and February stay at -1°C (30°F) highs with lows down to -6°C (21°F), and December and January have 15 rain and snow days each. Pack a warm insulated coat, thermal layers, a hat, gloves and boots with grip. The wind off the harbour makes it feel colder than the number.
Spring
March–MayMarch is still wintry at 3°C (37°F) with lows of -3°C (27°F). April gets to 8°C (46°F) and May to 14°C (57°F). Pack a warm jacket through April, and lighter layers plus a rain shell for May.
Summer
June–AugustHighs are 19–21°C (66–70°F) with lows of 11–15°C (52–59°F), but July and August each have 15 rain days. Bring light layers, a sweater for evenings and a packable rain jacket. Nights barely get dark in June, so a sleep mask earns its spot.
Autumn
September–NovemberSeptember sits at 17°C (63°F), October drops to 10°C (50°F) and November falls to 5°C (41°F) with 14 rain days. Pack a waterproof mid-weight jacket and warm layers, and treat November as winter.
What to bring to Helsinki
0 of 23 packed- Nite Ize RunOff Waterproof Packing CubeBags & Luggage
A waterproof cube with welded seams. Your wet swimsuit from Löyly goes in here instead of soaking everything else in your bag.
- Mack's Pillow Soft Silicone EarplugsSleep & Comfort
Waterproof silicone plugs that seal the outer ear. Handy for the sea plunge after the sauna, and on a noisy ferry to Tallinn.
- MZOO Sleep MaskSleep & Comfort
June nights barely get dark. The contoured shape rests on your orbital bones, so you sleep instead of staring at the light at 2am.
- A warm wrapClothing
A wool or cashmere wrap that doubles as a scarf in the harbour wind and a blanket on the flight in. We'd pack it for any Helsinki trip outside summer.
Four months of the year average 15 rain days here. Packs into its own pocket, so it's always with you.
The men's packable shell. A hood does what an umbrella can't on the windy Esplanadi.
- Peak Design Everyday Backpack Zip 20LBags & Luggage
Weather-sealed zippers keep your phone and camera dry on the ferry to Suomenlinna. Worth it in a city this wet.
- Epicka 70W Universal Travel AdapterTech & Power
EU plug for Finland's outlets plus 3 USB-C and 2 USB-A ports. Check the price before you book.
Clothing
- Insulated winter coat · 1January highs of -1°C
- Thermal base layers · 2 setsNov–Mar
- Hat, scarf and gloves · 1 setSea wind
- Wool sweater · 1
- Swimsuit · 1Public saunas require one
- Quick-dry towel · 1For the sauna
- Light layer for summer · 1July peaks at 21°C
Footwear
- Insulated waterproof boots · 1Winter ice and slush
- Flip-flops · 1Sauna changing rooms
Gear
- Compact umbrella · 1
Health and toiletries
- Lip balm and hand cream · 1Cold, dry winter air
- Moisturizer · 1
Documents and money
- Passport
- Credit card with no foreign transaction fees
Tech
- Phone charger and cable
What shoes should you pack for Helsinki?
Waterproof shoes or boots with grip. Helsinki is very walkable, from the Esplanadi to the Design District, but winter brings ice and slush. If you take the ferry to Suomenlinna, the island paths are gravel and uneven.
What do people wear in Helsinki?
Practical and understated. Locals wear good coats, plain colours and sensible shoes. Nobody dresses up much, and the right outdoor jacket counts for more than the outfit under it.
What plugs does Helsinki use?
Finland uses Type C and F plugs at 230V, the standard European two-pin. A universal adapter with the EU plug covers it.
Tours and things to do in Helsinki
Packed and ready? Browse guided tours, day trips and tickets for Helsinki.
What should you leave at home for Helsinki?
Leave the umbrella, harbour wind wrecks them. Skip fancy shoes that can't take slush. And don't overpack cash, cards work nearly everywhere.
Packing for Helsinki: questions people ask
What should I wear in Helsinki in winter?
An insulated coat, thermal layers, a hat, gloves and boots with grip. Highs sit around -1°C (30°F) in January and February, with lows of -6°C (21°F).
Do I need a swimsuit in Helsinki?
Yes, if you want to try a public sauna like Löyly or Allas Sea Pool. Mixed public saunas like these expect swimwear.
Does it rain a lot in Helsinki in summer?
Yes. July and August each average 15 rain days, so pack a rain jacket even though highs reach 20–21°C (68–70°F).
Is it light all night in Helsinki in June?
Close to it. Nights barely get dark around midsummer, so a sleep mask helps if you're a light sleeper.
What plug do I need for Finland?
Type C or F at 230V, the standard European plug.
Prices change often — the price on the retailer’s page is the one you pay.