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Weather in Kopavogur - 14-day forecast

Detailed weather forecast for Kopavogur, Iceland: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Kopavogur
today☁️ 11°💧 0.9 mm
Sun☁️ 12°💧 0.2 mm
Mon🌧️ 11°💧 1.9 mm
Tue☀️ 11°💧 2.7 mm
Wed☁️ 12°💧 6.8 mm
Thu🌧️ 10°💧 8.5 mm
Fri🌧️ 12°💧 0.5 mm
Sat🌧️ 10°💧 0.8 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Friday 11 Sept in Kopavogur, the forecast high is 12°C. Typical daytime temperatures at this time of year range from 9°C to 12°C, so it will be warmer than usual. It is warmer than 88% of similar days.

11°Cnear normal
usually 10°C–12°C
night: near normal rain: less rain than usual wind: typical
12°Cwarmer than usual
usually 10°C–12°C
warmer than 76% of similar days
night: warmer than usual rain: less rain than usual wind: typical
11°Cnear normal
usually 10°C–12°C
night: near normal rain: typical rainfall wind: stronger than usual
11°Cnear normal
usually 9°C–12°C
night: exceptionally warm rain: typical rainfall wind: typical
12°Cwarmer than usual
usually 9°C–12°C
warmer than 72% of similar days
night: exceptionally warm rain: more rain than usual wind: exceptionally strong
10°Cnear normal
usually 9°C–12°C
night: exceptionally warm rain: more rain than usual wind: stronger than usual
12°Cwarmer than usual
usually 9°C–12°C
warmer than 88% of similar days
night: warmer than usual rain: less rain than usual wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
5°13°20° 1981: 8°C1982: 8°C1983: 9°C1984: 10°C1985: 9°C1986: 10°C1987: 11°C1988: 11°C1989: 9°C1990: 9°C1991: 11°C1992: 8°C1993: 10°C1994: 11°C1995: 12°C1996: 12°C1997: 9°C1998: 10°C1999: 9°C2000: 11°C2001: 10°C2002: 10°C2003: 12°C2004: 11°C2005: 10°C2006: 11°C2007: 11°C2008: 12°C2009: 11°C2010: 13°C2011: 10°C2012: 8°C2013: 10°C2014: 11°C2015: 11°C2016: 11°C2017: 11°C2018: 11°C2019: 11°C2020: 10°C2021: 11°C2022: 14°C2023: 11°C2024: 9°C2025: 11°C 2026 forecast: 11°C current forecast 11°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 10°C by day. The coolest year was 1982 (8°C) and the warmest was 2022 (14°C). The current forecast averages 11°C - higher than in 84% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Kopavogur

No active weather warnings for Kopavogur (region: Reykjavik - Capital Region). The national weather service is not forecasting dangerous conditions.

14-day forecast - Kopavogur

Kopavogur - 14-day weather forecast infographic

Kopavogur 30 & 45-day weather - long-range outlook

Next 16 days · forecast
11°
around 9° at night · days with rain: 9
Weeks 3-4 · avg for September
11°
around 6° at night · rain chance 79%
Weeks 5-7 · avg for October
8°
around 3° at night · rain chance 72%
The 30 & 45-day outlook for Kopavogur: the next 16 days are a numerical forecast updated daily - on average 11° by day and 9° at night. Further out we rely on multi-year climate averages: around 11° in September, and about 8° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Kopavogur

Saturday5 September 2026
☁️11°overcast clouds
sunrise 06:21 · sunset 20:30 · night 8° · evening 12° · rain 0.94 mm · humidity 62% · wind 5 m/s · clouds 94%
Sunday6 September 2026
☁️12°overcast clouds
sunrise 06:24 · sunset 20:27 · night 9° · evening 11° · rain 0.21 mm · humidity 59% · wind 6 m/s · clouds 95%
Monday7 September 2026
🌧️11°light rain
sunrise 06:27 · sunset 20:23 · night 8° · evening 10° · rain 1.9 mm · humidity 71% · wind 8 m/s · clouds 70%
Tuesday8 September 2026
☀️11°clear sky
sunrise 06:29 · sunset 20:20 · night 10° · evening 12° · rain 2.7 mm · humidity 56% · wind 5 m/s · clouds 1%
Wednesday9 September 2026
☁️12°overcast clouds
sunrise 06:32 · sunset 20:16 · night 11° · evening 12° · rain 6.75 mm · humidity 77% · wind 10 m/s · clouds 100%
Thursday10 September 2026
🌧️10°moderate rain
sunrise 06:35 · sunset 20:13 · night 11° · evening 10° · rain 8.52 mm · humidity 78% · wind 8 m/s · clouds 100%
Friday11 September 2026
🌧️12°light rain
sunrise 06:38 · sunset 20:09 · night 9° · evening 10° · rain 0.48 mm · humidity 86% · wind 5 m/s · clouds 100%
Saturday12 September 2026
🌧️10°light rain
sunrise 06:41 · sunset 20:05 · night 10° · evening 10° · rain 0.75 mm · humidity 79% · wind 6 m/s · clouds 100%
Sunday13 September 2026
🌧️11°moderate rain
sunrise 06:44 · sunset 20:02 · night 11° · evening 10° · rain 9.78 mm · humidity 74% · wind 11 m/s · clouds 99%
Monday14 September 2026
🌧️11°moderate rain
sunrise 06:47 · sunset 19:58 · night 10° · evening 10° · rain 10.35 mm · humidity 80% · wind 6 m/s · clouds 100%
Tuesday15 September 2026
🌧️10°moderate rain
sunrise 06:49 · sunset 19:55 · night 10° · evening 11° · rain 7.41 mm · humidity 86% · wind 7 m/s · clouds 100%
Wednesday16 September 2026
🌧️12°light rain
sunrise 06:52 · sunset 19:51 · night 10° · evening 12° · rain 0.45 mm · humidity 68% · wind 7 m/s · clouds 99%
Thursday17 September 2026
☁️10°broken clouds
sunrise 06:55 · sunset 19:48 · night 9° · evening 11° · rain 3.54 mm · humidity 65% · wind 5 m/s · clouds 63%
Friday18 September 2026
🌧️11°light rain
sunrise 06:58 · sunset 19:44 · night 9° · evening 11° · rain 0.51 mm · humidity 72% · wind 8 m/s · clouds 80%
Saturday19 September 2026
☀️10°clear sky
sunrise 07:01 · sunset 19:40 · night 8° · evening 10° · rain 0.39 mm · humidity 70% · wind 4 m/s · clouds 99%
Sunday20 September 2026
🌧️10°moderate rain
sunrise 07:04 · sunset 19:37 · night 10° · evening 10° · rain 10.09 mm · humidity 89% · wind 16 m/s · clouds 99%

UV index in Kopavogur - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTKopavogur03681111+3.4UV MODERATEtoday, daily maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.Unprotected fair skin may burn in about 60 min3Sat5.093Sun6.093Mon7.093Tue8.093Wed9.090Thu10.093Fri11.093Sat12.091Sun13.091Mon14.092Tue15.091Wed16.090Thu17.090Fri18.091Sat19.091Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Kopavogur is 3 (moderate) - unprotected fair skin can burn in about 60 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Sea temperature - Kopavogur

Water today
11°C
Week avg
11°C
How's the water?
very cold
16-day sea temperature forecast:
5.09 11°C6.09 11°C7.09 11°C8.09 11°C9.09 11°C10.09 11°C11.09 11°C12.09 11°C13.09 11°C
Average sea temperature through the year:
Jan 2°CFeb 2°CMar 3°CApr 5°CMay 8°CJun 10°CJul 12°CAug 13°CSep 11°COct 8°CNov 6°CDec 4°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Kopavogur weather through the year

Kopavogur - annual climate

Warmest, driest months on average: May, June, July, August.

Upcoming public holidays in Iceland: Christmas Eve — 24 December · Christmas Day — 25 December · St. Stephen's Day — 26 December.

Nearby and related places

ReykjavíkAkureyriTorshavnAberdeenPerthSligoGlasgowDundee

FAQ - Kopavogur weather

What is the weather like in Kopavogur today?
Today it is about 11° during the day and 8° at night, overcast clouds.
How far ahead can I check the forecast for Kopavogur?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.