18.05
mon
mon
Day
50°F
E 11 mph
Precip.
0%
0%
Night
46°F
SW 4 mph
Precip.
0%
0%
19.05
tue
tue
Day
54°F
W 9 mph
Precip.
100%
100%
Night
52°F
W 15 mph
Precip.
61%
61%
20.05
wed
wed
Day
63°F
NW 14 mph
Precip.
0%
0%
Night
50°F
N 11 mph
Precip.
72%
72%
21.05
thu
thu
Day
55°F
NE 11 mph
Precip.
0%
0%
Night
48°F
NE 6 mph
Precip.
0%
0%
22.05
fri
fri
Day
50°F
SE 7 mph
Precip.
100%
100%
Night
46°F
SE 9 mph
Precip.
0%
0%
23.05
sat
sat
Day
54°F
E 6 mph
Precip.
0%
0%
Night
52°F
N 4 mph
Precip.
0%
0%
24.05
sun
sun
Day
45°F
E 8 mph
Precip.
69%
69%
Night
43°F
S 20 mph
Precip.
100%
100%
25.05
mon
mon
Day
48°F
S 12 mph
Precip.
0%
0%
Night
45°F
W 5 mph
Precip.
0%
0%
26.05
tue
tue
Day
52°F
NE 4 mph
Precip.
0%
0%
Night
46°F
N 7 mph
Precip.
0%
0%
27.05
wed
wed
Day
59°F
N 11 mph
Precip.
0%
0%
Night
50°F
NW 8 mph
Precip.
100%
100%
28.05
thu
thu
Day
48°F
N 9 mph
Precip.
100%
100%
Night
46°F
W 3 mph
Precip.
0%
0%
29.05
fri
fri
Day
50°F
E 6 mph
Precip.
62%
62%
Night
45°F
S 6 mph
Precip.
0%
0%
30.05
sat
sat
Day
52°F
NE 9 mph
Precip.
100%
100%
Night
46°F
SW 4 mph
Precip.
0%
0%
31.05
sun
sun
Day
57°F
W 2 mph
Precip.
0%
0%
Night
50°F
NW 4 mph
Precip.
100%
100%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 39.6°F. The highest and lowest sea temperatures during the month were 43.0°F and 36.7°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 56.6°F. The highest and lowest sea temperatures during the month were 61.0°F and 50.4°F.
Air temperature in Oulu, °F
Precipitation total in Oulu, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Oulu
Oulu on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Oulu
Local time: 17:23
May 18, monday
1800
50°F
E
7 mph
7 mph
2100
46°F
S
3 mph
3 mph
May 19, tuesday
0000
46°F
SW
4 mph
4 mph
0300
46°F
W
6 mph
6 mph
0600
46°F
SW
7 mph
7 mph
0900
52°F
W
7 mph
7 mph
1200
54°F
W
9 mph
9 mph
1500
50°F
W
14 mph
14 mph
