AI-generatedKeflavík at a glance
- Best time
- Jul
- Warmest month
- Jul · 15°
- Warmest sea
- Aug · 11.4°
- Sunshine a year
- 1,360 h
- Rain a year
- 1,267 mm
- Climate
- Maritime
- Time zone
- UTC+0
- Elevation
- 5 m
Climate in Keflavík
Keflavík has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 15 °C, while January is the coolest at 4 °C. With around 1,360 hours of sunshine a year, Keflavík is rather dull; May is the sunniest month with 6.7 hours a day.
Holiday weather through the year
Best time to visit Keflavík
The best time to visit Keflavík is in July. The sea stays too cool for a classic beach holiday: even in August it only reaches 11.4 °C. The wettest month is September with 135 mm of precipitation.
Keflavík through the seasons
How the weather changes over the seasons, with averages for each.
Keflavík in spring
Mar – May
Poor
- 5–10 °C by day
- Sea 6 °C
- 5.2 h of sun a day
- 49 rainy days in all
Keflavík in summer
Jun – Aug
Fair
- 13–15 °C by day
- Sea 11 °C
- 5.9 h of sun a day
- 43 rainy days in all
Keflavík in autumn
Sep – Nov
Poor
- 6–12 °C by day
- Sea 9 °C
- 2.7 h of sun a day
- 49 rainy days in all
Keflavík in winter
Dec – Feb
Poor
- 4 °C by day
- Sea 6 °C
- 1.0 h of sun a day
- 52 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
All year
Rainy season or more than 12 rainy days
Snow
Nov – Apr
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Keflavík for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Poor
Best time to visit: July
Where to go in OctoberSea temperature in October
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 4°
- Midday, 13:00: about 8°
- Afternoon, 16:00: about 8°
- Evening, 20:00: about 6°
- Night, 23:00: about 5°
08:1718:15
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:47–09:26 · evening 17:06–18:45
- Blue hour
- Morning 07:29–07:47 · evening 18:45–19:03
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Keflavík compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 10° at the start of the month to 7° at the end. The sea cools from 9° to 8°. The days get 3.2 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 10° | 7° |
| Night-time low | 5° | 2° |
| Sea | 9° | 8° |
| Daylight | 11.5 h | 8.3 h |
What is the weather like in Keflavík in October?
In October, Keflavík is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 8.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3.0 hours a day. It rains often – on about 16 days, adding up to 119 mm. Snow falls on about 2 days. All in all, October is not an ideal month for a holiday in Keflavík.
More details for October
- Daylight
- 9 h 58 min08:17 – 18:15
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 71 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 2 days1 cm or more of fresh snowAll months
- Time zone
- UTC+0offset from UTC
How the score comes together
- Temperatureweight 50 %1 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %17 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Warm jacket
- Rain jacket or umbrella
Compare two months in Keflavík
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Keflavík: score 55 against 6. In July, days are 7 °C warmer than in October. The sea is 3 °C warmer in July. July has 2 fewer rainy days. The sun shines 3 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 6 | 55better |
| Daytime high | 8° | 15° |
| Night-time low | 4° | 10° |
| Sea | 8.6° | 11.1° |
| Sunshine | 3.0 h | 5.9 hbetter |
| Rainy days | 16 | 14better |
| Rainfall | 119 mm | 79 mmbetter |
Based on the climate averages 1996–2025.
Keflavík month by month
The typical weather for every month at a glance.
0January4° · Sea 6° · 0.7 h
In January, Keflavík is cold: daytime highs average 4 °C, and nights often drop below freezing (−1 °C). The sea averages 5.5 °C – swimming is only for the hardy. The sun is scarce, with only about 0.7 hours a day. Precipitation falls on about 18 days, totalling 120 mm; on about 8 of them it snows. It is often windy: on a typical day the wind peaks at around 29 km/h. All in all, January is not an ideal month for a holiday in Keflavík.
Keflavík in January3February4° · Sea 5° · 2.1 h
In February, Keflavík is cold: daytime highs average 4 °C, and nights often drop below freezing (−1 °C). The sea averages 5.3 °C – swimming is only for the hardy. The sun is scarce, with only about 2.1 hours a day. Precipitation falls on about 17 days, totalling 119 mm; on about 9 of them it snows. It is often windy: on a typical day the wind peaks at around 31 km/h. All in all, February is not an ideal month for a holiday in Keflavík.
Keflavík in February4March5° · Sea 5° · 3.5 h
In March, Keflavík is cold: daytime highs average 5 °C, and nights cool down to about −1 °C. The sea averages 5.2 °C – swimming is only for the hardy. The sun is scarce, with only about 3.5 hours a day. It rains often – on about 17 days, adding up to 113 mm. Snow falls on about 8 days. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, March is not an ideal month for a holiday in Keflavík.
Keflavík in March12April7° · Sea 6° · 5.5 h
In April, Keflavík is cold: daytime highs average 7 °C, and nights cool down to about 2 °C. The sea averages 5.9 °C – swimming is only for the hardy. Expect around 5.5 hours of sunshine a day. It rains often – on about 16 days, adding up to 98 mm. Snow falls on about 3 days. All in all, April is not an ideal month for a holiday in Keflavík.
Keflavík in April28May10° · Sea 7° · 6.7 h
In May, Keflavík is cool: daytime highs average 10 °C, and nights cool down to about 5 °C. The sea averages 7.4 °C – swimming is only for the hardy. The sun shines for around 6.7 hours a day. It rains often – on about 16 days, adding up to 88 mm. All in all, May is not an ideal month for a holiday in Keflavík.
Keflavík in May48June13° · Sea 10° · 6.4 h
In June, Keflavík is cool: daytime highs average 13 °C, and nights cool down to about 8 °C. The sea averages 9.5 °C – swimming is only for the hardy. Expect around 6.4 hours of sunshine a day. It rains often – on about 14 days, adding up to 74 mm. All in all, June is a so-so month for a holiday in Keflavík.
Keflavík in June55July15° · Sea 11° · 5.9 h
In July, Keflavík is cool: daytime highs average 15 °C, and nights cool down to about 10 °C. The sea averages 11.1 °C – swimming is only for the hardy. Expect around 5.9 hours of sunshine a day. It rains often – on about 14 days, adding up to 79 mm. All in all, July is a so-so month for a holiday in Keflavík – and yet one of the best months here.
Keflavík in July48August14° · Sea 11° · 5.3 h
In August, Keflavík is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 11.4 °C – swimming is only for the hardy. Expect around 5.3 hours of sunshine a day. It rains often – on about 15 days, adding up to 97 mm. All in all, August is a so-so month for a holiday in Keflavík.
Keflavík in August23September12° · Sea 10° · 3.9 h
In September, Keflavík is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 10.2 °C – swimming is only for the hardy. The sun is scarce, with only about 3.9 hours a day. It rains often – on about 18 days, adding up to 135 mm. All in all, September is not an ideal month for a holiday in Keflavík.
Keflavík in September6October8° · Sea 9° · 3.0 h
In October, Keflavík is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 8.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3.0 hours a day. It rains often – on about 16 days, adding up to 119 mm. Snow falls on about 2 days. All in all, October is not an ideal month for a holiday in Keflavík.
Keflavík in October5November6° · Sea 7° · 1.3 h
In November, Keflavík is cold: daytime highs average 6 °C, and nights cool down to about 1 °C. The sea averages 7.2 °C – swimming is only for the hardy. The sun is scarce, with only about 1.3 hours a day. It rains often – on about 16 days, adding up to 109 mm. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Keflavík.
Keflavík in November2December4° · Sea 6° · 0.3 h
In December, Keflavík is cold: daytime highs average 4 °C, and nights often drop below freezing (−1 °C). The sea averages 6.2 °C – swimming is only for the hardy. The sun is scarce, with only about 0.3 hours a day. It rains often – on about 17 days, adding up to 118 mm. Snow falls on about 8 days. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, December is not an ideal month for a holiday in Keflavík.
Keflavík in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Keflavík
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
ColdOctober: nights around 4°. The room should be heated.
The coolest nights are in February (−1°), the warmest in July (10°). Nights fall below 8 °C on average from September to May, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 0 | 4° | −1° | 5.5° | 0.7 h | 18 | 120 |
| FebruaryFeb | 3 | 4° | −1° | 5.3° | 2.1 h | 17 | 119 |
| MarchMar | 4 | 5° | −1° | 5.2° | 3.5 h | 17 | 113 |
| AprilApr | 12 | 7° | 2° | 5.9° | 5.5 h | 16 | 98 |
| MayMay | 28 | 10° | 5° | 7.4° | 6.7 h | 16 | 88 |
| JuneJun | 48 | 13° | 8° | 9.5° | 6.4 h | 14 | 74 |
| JulyJul | 55 | 15° | 10° | 11.1° | 5.9 h | 14 | 79 |
| AugustAug | 48 | 14° | 9° | 11.4° | 5.3 h | 15 | 97 |
| SeptemberSep | 23 | 12° | 7° | 10.2° | 3.9 h | 18 | 135 |
| OctoberOct | 6 | 8° | 4° | 8.6° | 3.0 h | 16 | 119 |
| NovemberNov | 5 | 6° | 1° | 7.2° | 1.3 h | 16 | 109 |
| DecemberDec | 2 | 4° | −1° | 6.2° | 0.3 h | 17 | 118 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), 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
64.00° N, 22.56° W · 5 m · Atlantic/Reykjavik
Sea temperature in Keflavík
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 7.8 – 9.4 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Keflavík ranges from 5.2 °C in March to 11.4 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From October to March the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 10.7 and 12.2 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 5.5° | 5.0° | 6.1° | cold |
| FebruaryFeb | 5.3° | 4.7° | 5.8° | cold |
| MarchMar | 5.2° | 4.8° | 5.8° | cold |
| AprilApr | 5.9° | 5.2° | 6.3° | cold |
| MayMay | 7.4° | 6.9° | 8.1° | cold |
| JuneJun | 9.5° | 8.7° | 10.4° | cold |
| JulyJul | 11.1° | 10.4° | 11.9° | cold |
| AugustAug | 11.4° | 10.7° | 12.2° | cold |
| SeptemberSep | 10.2° | 9.5° | 11.0° | cold |
| OctoberOct | 8.6° | 7.8° | 9.4° | cold |
| NovemberNov | 7.2° | 6.5° | 7.8° | cold |
| DecemberDec | 6.2° | 5.7° | 6.6° | cold |
Sunshine hours in Keflavík
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 3.0 of 10.0 hours of daylight in Keflavík, 30 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Keflavík: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Keflavík has about 16 rainy days with 119 mm of rain in total.
UV index in Keflavík
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 1 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 5).
Minutes until sunburn in October
- Very fair skin
- over 2 h
- Fair skin
- over 2 h
- Light brown skin
- over 2 h
- Olive skin
- over 2 h
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Keflavík
How breezy and how cloudy Keflavík is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Keflavík typically peaks at 26 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it is that strong all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 71 % of the sky over Keflavík: mostly cloudy, with about 3.0 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Snow in Keflavík
When Keflavík is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, Keflavík has about 2 days with at least 1 cm of fresh snow, 6 cm in total. The chance of seeing snow during a week's stay is 20 out of 100: possible.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Keflavík
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Keflavík in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Keflavík has its best school-holiday weather during the summer holidays (score 50) and its weakest during the Christmas holidays (score 1).
- 10
Easter holidays
Mar – Apr
Poor
- 6 °C by day
- Sea 6 °C
- 4.9 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain, Snow
- 32
May half-term
May – Jun
Poor
- 11 °C by day
- Sea 8 °C
- 6.6 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 50
Summer holidays
Jul – Aug
FairBest holidays
- 14 °C by day
- Sea 11 °C
- 5.5 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 6
October half-term
Oct
Poor
- 8 °C by day
- Sea 9 °C
- 3.0 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain
- 1
Christmas holidays
Dec – Jan
Poor
- 4 °C by day
- Sea 6 °C
- 0.5 h of sun a day
- 18 rainy days a month
Keep in mind: Frequent rain, Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 2 h 45 min
- Distance
- 1,900 km
- Time zone
- UTC+0
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Compare & alternatives
Keflavík compared
Put Keflavík side by side with another destination.
Keflavík vs Grindavík
In October the holiday weather in Keflavík and Grindavík is about equally good (score 6 vs 6). During the day it is about as warm in Grindavík as in Keflavík. The sea is about equally warm.
| in October | Keflavík | Grindavík |
|---|---|---|
| Holiday weather score | 6 | 6 |
| Daytime high | 8° | 8° |
| Sea | 9° | 9° |
| Sunshine | 3 h | 3 h |
| Rainy days | 16 | 15 |
| Best time | Jul | Jul |
Through the year
Iceland in October: the best places
In October, Keflavík ranks 2 of 14 destinations in this country.
- Stykkishólmur7°7°7
- 2KeflavíkThis page8°9°6
- 3Grindavík8°9°6
- 4Hafnarfjörður8°9°6
- 5Reykjavík8°9°6
- 6Borgarnes8°8°5
- 7Hveragerði8°9°4
- 8Selfoss8°9°3
Near Keflavík
Other destinations close by.
Places with a climate like Keflavík
Destinations whose weather through the year is closest to Keflavík's – good alternatives.
Frequently asked questions about Keflavík
When is the best time to visit Keflavík?
The best time to visit Keflavík is in July. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Keflavík?
The sea temperature in Keflavík ranges from 5.2 °C in March to 11.4 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Keflavík in October?
Only if you don't mind cold water: in October the sea averages just 8.6 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Keflavík?
July is the warmest month, with average highs of 15 °C and nights around 10 °C. January is the coolest month at 4 °C.
When does it rain most in Keflavík?
The wettest month is September with 135 mm of precipitation. The driest month is June with 74 mm.
How many hours of sunshine does Keflavík get?
Keflavík gets around 1,360 hours of sunshine a year. The sunniest month is May with 6.7 hours a day; in December there are 0.3 hours a day.
What time zone is Keflavík in?
Keflavík is on UTC all year.
How long is the flight from London to Keflavík?
A nonstop flight from London to Keflavík takes about 2 h 45 min, for a straight-line distance of about 1,900 km.
Which school holidays are best for Keflavík?
Keflavík has its best school-holiday weather during the summer holidays (score 50) and its weakest during the Christmas holidays (score 1). Holiday ratings (0–100): Easter holidays 10, May half-term 32, summer holidays 50, October half-term 6, Christmas holidays 1.