Is today a good day for scuba diving in Helsinki?
Today is not the day.
Not a day for scuba diving. Force 4, but gusting Force 6 — it is the spread that catches you out, not the average. Out of season for it, whatever the weather does.
Not today16/100
7-day outlook for scuba diving in Helsinki
Best day looks like Today at 16/100.
Why this score?
Data from Open-Meteo, and Open-Meteo Marine for waves and sea temperature. Last updated 21:31 UTC.
Scuba diving in Helsinki, month by month
The sea is warmest in August at 19°C and coldest in January at 0°C. Offshore waves are biggest in January (the day's highest averages 0.7 m) and smallest in March (0.4 m). Daytime highs peak at 21°C in July and fall to 0°C in January. January is the wettest month, with about 15 days of 1 mm or more; June is the driest, with about 8.
Our seasonal guide puts scuba diving in season from May to October.
| Month | Sea temperature (°C) | Offshore wave height (m) | Daytime high (°C) | Rainy days (days) |
|---|---|---|---|---|
| January | 0 | 0.7 | 0 | 15 |
| February | 0 | 0.6 | 0 | 12 |
| March | 0 | 0.4 | 2 | 10 |
| April | 3 | 0.4 | 7 | 10 |
| May (in season) | 10 | 0.4 | 13 | 9 |
| June (in season) | 17 | 0.4 | 20 | 8 |
| July (in season) | 18 | 0.4 | 21 | 13 |
| August (in season) | 19 | 0.4 | 20 | 14 |
| September (in season) | 18 | 0.5 | 16 | 10 |
| October (in season) | 11 | 0.7 | 10 | 14 |
| November | 5 | 0.7 | 5 | 14 |
| December | 1 | 0.6 | 0 | 15 |
In season, by our seasonal guide
Averages of daily weather 2020 to 2024 and of waves and sea temperature 2022 to 2024, from ERA5 reanalysis data (about 25 km resolution; waves are measured offshore, not in the surf at the beach). Not a forecast.
About scuba diving in Helsinki
Built across a Baltic archipelago — long summer evenings, hard winters, sauna culture, and ice swimming.
Go Daisy scores 44 activities for Helsinki, including running, cycling, urban exploring, photography, outdoor yoga. The score for scuba diving updates hourly from the same weather data professional services use.
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Score for scuba diving in Helsinki updated hourly. Free, ad-free. Built by independent makers in the UK and Asturias, Spain.
Weather data from Open-Meteo.