Swimming in Grindavík in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Grindavík in september 2025.
In september, according to seasonal norms, the sea temperature in Grindavík is:
Minimum: 48°F
Average: 51°F
Maximum: 53°F
Other useful seasonal weather averages in september:
- Outside temperature: 48°F to 51°F
- Most common weather: "Moderate rain at times"
- The wind blows at 3.7mph
- It rains a total of 8in, over 13 day(s).
Should we swim in Grindavík in september?
No... The water temperature in Grindavík in september is freezing
You won't be able to swim in Grindavík in september! The water temperature is freezing, reaching as low as 48°F (and only 53°F at best)! Our advice: if you are going to Grindavík this month, plan to sightsee and forget the beach!
Note also that in september, the climate is bad with an average outside temperature of 50°F, 8in of precipitation (over 13 days) and 82.92 % humidity.
Water and normal seasonal temperatures in Grindavík in september
| September | |||
| Average sea temperature | 51°F | ||
| Minimum sea temperature | 48°F | ||
| Maximum sea temperature | 53°F | ||
| Average outside temperature | 50°F | ||
| Maximum outside temperature | 52°F | ||
| Minimum outside temperature | 49°F | ||
| Wind speed | 21.8mph | ||
| Wind temperature | 43°F | ||
| Precipitation | 8in | ||
| Number of days of rain | 13 jour(s) (42%) | ||
| Humidity | 83% | ||
| Visibility in kilometers | 8.85km | ||
| Cloud cover | 64% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Grindavík
Swim elsewhere in Iceland in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Reykjavík in september | 50°F | 52°F | freezing swimming | 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 | 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 |