21.09
mon
mon
Day
52°F
N 24 mph
Precip.
55%
55%
Night
50°F
N 23 mph
Precip.
53%
53%
22.09
tue
tue
Day
46°F
NE 34 mph
Precip.
41%
41%
Night
46°F
NE 25 mph
Precip.
32%
32%
23.09
wed
wed
Day
48°F
NE 24 mph
Precip.
34%
34%
Night
46°F
W 26 mph
Precip.
63%
63%
24.09
thu
thu
Day
50°F
W 22 mph
Precip.
56%
56%
Night
48°F
S 9 mph
Precip.
40%
40%
25.09
fri
fri
Day
48°F
NE 18 mph
Precip.
33%
33%
Night
48°F
NW 13 mph
Precip.
24%
24%
26.09
sat
sat
Day
48°F
SW 14 mph
Precip.
48%
48%
Night
46°F
NW 7 mph
Precip.
32%
32%
27.09
sun
sun
Day
48°F
NE 9 mph
Precip.
27%
27%
Night
46°F
W 13 mph
Precip.
20%
20%
sea water
temperature
temperature
| Reykjavik |
monthly
weather
weather
| Reykjavik |
current
weather
weather
| Reykjavik |
14 days
forecast
forecast
| Reykjavik |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 51.9°F. The highest and lowest sea temperatures during the month were 53.4°F and 50.5°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 49.7°F. The highest and lowest sea temperatures during the month were 52.7°F and 46.6°F.
Air temperature in Reykjavik, °F
Precipitation total in Reykjavik, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Reykjavik
Reykjavik on a weather map
24 Hours Forecast
Reykjavik
Local time: 16:39
September 21, monday
1800
50°F
N
34 mph
34 mph
2100
50°F
N
30 mph
30 mph
September 22, tuesday
0000
50°F
N
23 mph
23 mph
0300
48°F
N
22 mph
22 mph
0600
48°F
N
22 mph
22 mph
0900
46°F
NE
26 mph
26 mph
1200
46°F
NE
34 mph
34 mph
1500
48°F
NE
30 mph
30 mph
