Measurements:
°C
°F
Lahti
82°F
E 9 mph
Feels like: 82°F
Precip: 4%
World Resorts Finland Lahti Weather

Lahti Sea Water Temperature

Current Sea Water Temperature:
+65.2°F
Maximum Sea Water Temperature in June: 76.6°F
Minimum Sea Water Temperature in June: 44.0°F
Average water temperature in June: 59.5°F

Sea Water Temperature for the Last 10 Days:

June 21 65.2°F June 16 60.8°F
June 20 62.0°F June 15 61.4°F
June 19 60.2°F June 14 62.0°F
June 18 60.8°F June 13 62.2°F
June 17 60.4°F June 12 62.6°F

When is the Warmest Sea for Lahti?

According to our data for the last three years for Lahti the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Lahti was 69.1°F. The maximum and minimum values were 63.6°F and 77.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Lahti was 69.3°F. The maximum and minimum values were 60.8°F and 77.2°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lahti was 61.8°F. The maximum and minimum values were 57.2°F and 65.2°F respectively.

Best Time to Visit Lahti
The most sunny months:
June 12 days
May 11 days
July 11 days
The most warm months:
July 73.9 °F
August 70.4 °F
June 69.1 °F
Warmest sea temperature:
August 69.9 °F
July 67.3 °F
September 62.7 °F
The most cold months:
January 19.9 °F
February 22.5 °F
December 26.4 °F
The most rainy months:
August 4 days
July 4 days
June 4 days
The most windy months:
December 7 mph
March 7 mph
October 7 mph

Lahti on the Weather Map

Finland Resorts:
NAME
Espoo +80
Helsinki +72
Imatra +82
Juvaskyla +72
Kemi +60
Koli National Park +66
Lahti +82
Oulu +58
Pori +64
Porvoo +62
Saariselka +48
Seinajoki +72
Turku +72
Vaasa +62
Vantaa +80
24 Hours Weather Forecast
Lahti
Local time: 14:10
21 jun, sunday
1500 82°F
E
9 mph
1800 80°F
SE
9 mph
2100 70°F
SE
7 mph
22 jun, monday
0000 56°F
SE
6 mph
0300 54°F
SE
7 mph
0600 54°F
S
8 mph
0900 62°F
S
9 mph
1200 70°F
SE
9 mph