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Mariehamn
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Water Temperature in the Baltic Sea in Mariehamn, Finland: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Mariehamn in Finland, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Water Temperature in Mariehamn
18.3°C
TODAY
18.7°C
YESTERDAY
20.2°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Baltic Sea in Mariehamn is 18.3°C. This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart for Baltic Sea in Mariehamn Over the Last 30 Days
The water temperature in Mariehamn today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.
According to our forecast, the sea temperature in Mariehamn will remain nearly unchanged in the coming days, its value will be 18.8°C.
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across Finland to enhance accuracy.
Water temperature data for Mariehamn and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Aug 1 | 20.2°C | 19.0°C | |
| Aug 2 | 20.3°C | 19.5°C | |
| Aug 3 | 19.4°C | 19.0°C | |
| Aug 4 | 20.1°C | 19.3°C | |
| Aug 5 | 20.0°C | 18.5°C | |
| Aug 6 | 19.9°C | 18.5°C | |
| Aug 7 | 18.7°C | 19.0°C | |
| Aug 8 | 17.8°C | 18.3°C | |
| Aug 9 | 18.8°C | 18.4°C | |
| Aug 10 | 19.0°C | 18.5°C | |
| Aug 11 | 19.3°C | 18.6°C | |
| Aug 12 | 19.3°C | 18.7°C | |
| Aug 13 | 19.3°C | 18.8°C | |
| Aug 14 | 19.3°C | 18.9°C | |
| Aug 15 | 18.5°C | 18.8°C | |
| Aug 16 | 18.5°C | 18.8°C |
Sea Temperature in Mariehamn Throughout the Year
Throughout the year, the sea temperature in Mariehamn exceeds 77°F (25°C) for 0 days, exceeds 72°F (22°C) for 0 days, and exceeds 64°F (18°C) for 40 days.
Below is the annual chart of sea temperature changes in the Baltic Sea in Mariehamn.
January
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 2°C | 5°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 1°C | 3°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 1°C | 3°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 2°C | 5°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 4.5°C | 10°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 12°C | 17°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 18.5°C | 23°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 19°C | 24°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 15°C | 19°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 0°C | 7.5°C | 15°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 0°C | 5°C | 10°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 3°C | 7°C |
Monthly Water Temperature Histogram for Baltic Sea in Mariehamn
You can explore detailed data on how the water temperature in Mariehamn varies each month:
Mariehamn Weather
AUGUST 9
17°C / 20°C
scattered clouds: 25-50%humidity: 70% | wind: 6 km/h
AUGUST 10
16°C / 18°C
overcast clouds: 85-100%humidity: 69% | wind: 8 km/h
AUGUST 11
16°C / 19°C
broken clouds: 51-84%humidity: 74% | wind: 7 km/h
Sea Temperature in the Baltic Sea in Mariehamn: General Trends and Swimming Opportunities
The Åland Islands in Finland typically have a maritime climate characterized by cool summers and mild winters. The coastal location also leads to substantial rainfall throughout the year, particularly in late summer and autumn.
Mariehamn is located in Europe in the Northern Hemisphere at a latitude of 60 degrees, along the shores of the Baltic Sea. Mariehamn lies within the Åland in Finland.
The average annual daytime air temperature in Mariehamn is 8°C (46°F), with the average nighttime temperature being 2°C (36°F). The highest average daily temperature occurs in July, reaching 22°C (72°F), while the lowest is in February at -4°C (25°F). As for nighttime temperatures, the minimum average temperature of -8°C (18°F) is recorded in February, and the maximum is in July, reaching 13°C (55°F).
According to historical data, Mariehamn experiences 124 rainy days per year, which accounts for 34 percent of all days in the year. On average, there are 10 rainy days each month. The wettest month is December, with 12 rainy days and 62 mm (2.4 inches) of precipitation, while the driest month is April, which typically has 8 rainy days and only 32 mm (1.3 inches) of precipitation.
The average annual water temperature in Baltic Sea in Mariehamn is 8°C (46°F). In January, the water reaches its lowest point of the year at -1°C (30°F), while in August, it peaks at 24°C (75°F). In Mariehamn, the water temperature in the Baltic Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Mariehamn
Nearby Cities
Frequently Asked Questions About Mariehamn and its Water Temperatures
What is the current sea temperature in Mariehamn?
The water temperature today in the Baltic Sea in Mariehamn is 65°F (18.3°C).
In which months is the water temperature in Mariehamn comfortable for swimming?
It cannot be guaranteed that the water temperature in Mariehamn will be comfortable for swimming in any month of the year.
What is the water temperature in Mariehamn during the winter?
The water temperature in the Baltic Sea in Mariehamn during the winter ranges from -1°C to 7°C (30°F to 45°F).
What is the water temperature in Mariehamn during the spring?
The water temperature in the Baltic Sea in Mariehamn during the spring ranges from -1°C to 10°C (30°F to 50°F).
What is the water temperature in Mariehamn during the summer?
The water temperature in the Baltic Sea in Mariehamn during the summer ranges from 7°C to 24°C (45°F to 75°F).
What is the water temperature in Mariehamn during the fall?
The water temperature in the Baltic Sea in Mariehamn during the fall ranges from 0°C to 19°C (32°F to 66°F).
Is it possible to swim in the sea in Mariehamn at any time of the year?
The Baltic Sea in Mariehamn is quite cool, and swimming is only possible in July, and August when the water temperature reaches 21°C (70°F).
What sea temperatures can I expect in Mariehamn in the next month?
In September, the water temperature in the Baltic Sea in Mariehamn will range between 52°F (11°C) and 66°F (19°C)