Measurements:
°C
°F
CURRENT WEATHER
02:50
Porvoo
56°F
NE 14 mph
Feels like: 52°F
Precip: 26%
World Resorts Finland Porvoo Weather

7 Day Weather Forecast

09.29
tue
DAY
56°F
NE 14 mph
precip
27%
NIGHT
58°F
SE 4 mph
precip
34%
09.30
wed
DAY
54°F
SW 10 mph
precip
7%
NIGHT
56°F
W 11 mph
precip
21%
10.01
thu
DAY
56°F
NW 11 mph
precip
15%
NIGHT
58°F
NE 8 mph
precip
12%
10.02
fri
DAY
56°F
NE 9 mph
precip
13%
NIGHT
56°F
NE 13 mph
precip
16%
10.03
sat
DAY
56°F
NE 16 mph
precip
26%
NIGHT
56°F
NE 15 mph
precip
27%
10.04
sun
DAY
54°F
NE 14 mph
precip
25%
NIGHT
54°F
NE 14 mph
precip
18%
10.05
mon
DAY
54°F
NE 14 mph
precip
10%
NIGHT
54°F
E 9 mph
precip
10%

Porvoo Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Porvoo was 14.3°F. The maximum and minimum values were 13.0°F and 15.7°F respectively.

Porvoo on the Weather Map

Best Time to Visit Porvoo
The most sunny months:
June 15 days
July 14 days
May 13 days
The most warm months:
July 67.9 °F
August 67.4 °F
June 60.9 °F
Warmest sea temperature:
August 65.0 °F
July 64.5 °F
September 59.4 °F
The most cold months:
February 24.8 °F
January 25.0 °F
March 31.4 °F
The most rainy months:
August 4 days
October 4 days
September 4 days
The most windy months:
December 14 mph
October 14 mph
November 14 mph
more details