Measurements:
°C
°F
CURRENT WEATHER
03:44
Lappeenranta
50°F
N 6 mph
Feels like: 48°F
Precip: 32%
World Resorts Finland Lappeenranta Weather

7 Day Weather Forecast

09.29
tue
DAY
54°F
N 7 mph
precip
39%
NIGHT
54°F
SE 4 mph
precip
42%
09.30
wed
DAY
56°F
S 6 mph
precip
4%
NIGHT
46°F
W 4 mph
precip
28%
10.01
thu
DAY
54°F
N 4 mph
precip
13%
NIGHT
46°F
NE 5 mph
precip
19%
10.02
fri
DAY
58°F
E 6 mph
precip
15%
NIGHT
52°F
NE 6 mph
precip
14%
10.03
sat
DAY
58°F
NE 9 mph
precip
19%
NIGHT
52°F
NE 7 mph
precip
24%
10.04
sun
DAY
58°F
NE 8 mph
precip
7%
NIGHT
50°F
NE 7 mph
precip
21%
10.05
mon
DAY
58°F
NE 9 mph
precip
5%
NIGHT
48°F
NE 5 mph
precip
15%

Lappeenranta Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Lappeenranta was 15.3°F. The maximum and minimum values were 13.5°F and 17.1°F respectively.

Lappeenranta on the Weather Map

Best Time to Visit Lappeenranta
The most sunny months:
July 12 days
June 11 days
May 11 days
The most warm months:
July 73.2 °F
August 70.0 °F
June 67.9 °F
Warmest sea temperature:
August 67.4 °F
July 66.8 °F
September 60.3 °F
The most cold months:
January 19.0 °F
February 21.0 °F
December 26.2 °F
The most rainy months:
June 4 days
October 4 days
August 4 days
The most windy months:
December 9 mph
November 9 mph
October 9 mph
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