Grindavík weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: May – August
What is the weather like in Grindavík in December?
In December, Grindavík is cold: daytime highs average 3 °C, and nights cool down to about 0 °C. The sea averages 6.6 °C – swimming is only for the hardy. The sun is scarce, with only about 0 hours a day. Precipitation, often as snow, falls on about 17 days, totalling 118 mm. Snow falls on about 8 days. It is often windy, with gusts of around 29 km/h. All in all, December is not an ideal month for a holiday in Grindavík.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 3 | 1 | 0 |
| Day | 5° | 3° | 3° |
| Night | 2° | 0° | 0° |
| Sea | 8° | 7° | 6° |
| Sun | 1 h | 0 h | 1 h |
| Rain days | 16 | 17 | 18 |
More details for December
- Daylight
- 4 h 25 min11:12 – 15:37
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 29 km/haverage daily peakAll months
- Cloud cover
- 74 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 8 days1 cm or more of fresh snowAll months
- Time zone
- UTC+0Atlantic/Reykjavik
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 20 %6 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
- Windproof jacket
Grindavík in December: quick answers
Is Grindavík hot in December?
No. In December, Grindavík is cold: daytime highs average 3 °C and nights drop to about 0 °C.
Can you swim in Grindavík in December?
Only if you don't mind cold water: in December the sea averages just 6.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Grindavík in December?
It rains often – on about 17 days, adding up to 118 mm.
Grindavík month by month
The whole year in GrindavíkAll destinations: IcelandWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences