Swimming in Reykjavík in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Reykjavík in september 2025.
In september, according to seasonal norms, the sea temperature in Reykjavík is:
Minimum: 47°F
Average: 50°F
Maximum: 52°F
Other useful seasonal weather averages in september:
- Outside temperature: 45°F to 51°F
- Most common weather: "Cloudy"
- The wind blows at 2.5mph
- It rains a total of 5.4in, over 10 day(s).
Should we swim in Reykjavík in september?
No... The water temperature in Reykjavík in september is freezing
You won't be able to swim in Reykjavík in september! The water temperature is freezing, reaching as low as 47°F (and only 52°F at best)! Our advice: if you are going to Reykjavík this month, plan to sightsee and forget the beach!
Note also that in september, the climate is bad with an average outside temperature of 48°F, 5.3in of precipitation (over 10 days) and 86.77 % humidity.
Water and normal seasonal temperatures in Reykjavík in september
| September | |||
| Average sea temperature | 50°F | ||
| Minimum sea temperature | 47°F | ||
| Maximum sea temperature | 52°F | ||
| Average outside temperature | 49°F | ||
| Maximum outside temperature | 52°F | ||
| Minimum outside temperature | 47°F | ||
| Wind speed | 16.8mph | ||
| Wind temperature | 40°F | ||
| Precipitation | 5.4in | ||
| Number of days of rain | 10 jour(s) (33%) | ||
| Humidity | 87% | ||
| Visibility in kilometers | 8.69km | ||
| Cloud cover | 66% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Reykjavík
Swim elsewhere in Iceland in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Akureyri in september | 46°F | 49°F | freezing swimming | Borgarnes in september | 49°F | 51°F | freezing swimming | Djúpavík in september | 46°F | 49°F | freezing swimming | Grindavík in september | 51°F | 53°F | freezing swimming | Hofn in september | 49°F | 52°F | freezing swimming | Ísafjörður in september | 46°F | 49°F | freezing swimming | Ólafsvík in september | 49°F | 51°F | freezing swimming | Patreksfjörður in september | 46°F | 49°F | freezing swimming | Raufarhöfn in september | 46°F | 49°F | freezing swimming | Siglufjördur in september | 45°F | 48°F | freezing swimming | Snaefellsnes in september | 49°F | 51°F | freezing swimming | Vík í Mýrdal in september | 51°F | 54°F | freezing swimming | Jokulsarlon in september | 49°F | 52°F | freezing swimming |