AI-generatedSelfoss at a glance
- Best time
- Jul
- Warmest month
- Jul · 16°
- Warmest sea
- Aug · 11.8°
- Sunshine a year
- 1,270 h
- Rain a year
- 1,567 mm
- Climate
- Maritime
- Time zone
- UTC+0
- Elevation
- 16 m
Climate in Selfoss
Selfoss has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 16 °C, while January is the coolest at 3 °C. With around 1,270 hours of sunshine a year, Selfoss is rather dull; May is the sunniest month with 6.2 hours a day.
Holiday weather through the year
Best time to visit Selfoss
The best time to visit Selfoss is in July. The sea stays too cool for a classic beach holiday: even in August it only reaches 11.8 °C. The wettest month is September with 175 mm of precipitation.
Selfoss through the seasons
How the weather changes over the seasons, with averages for each.
Selfoss in spring
Mar – May
Poor
- 5–11 °C by day
- Sea 7 °C
- 4.9 h of sun a day
- 49 rainy days in all
Selfoss in summer
Jun – Aug
Fair
- 14–16 °C by day
- Sea 11 °C
- 5.2 h of sun a day
- 44 rainy days in all
Selfoss in autumn
Sep – Nov
Poor
- 5–12 °C by day
- Sea 9 °C
- 2.6 h of sun a day
- 52 rainy days in all
Selfoss in winter
Dec – Feb
Poor
- 3–4 °C by day
- Sea 6 °C
- 1.1 h of sun a day
- 55 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 Selfoss for you.
Your best months: June – 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 7°
- Afternoon, 16:00: about 8°
- Evening, 20:00: about 6°
- Night, 23:00: about 5°
08:1018:09
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 07:41–09:19 · evening 17:00–18:39
- Blue hour
- Morning 07:22–07:41 · evening 18:39–18:57
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 Selfoss 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 6° 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° | 6° |
| Night-time low | 5° | 2° |
| Sea | 9° | 8° |
| Daylight | 11.5 h | 8.3 h |
What is the weather like in Selfoss in October?
In October, Selfoss is cold: daytime highs average 8 °C, and nights cool down to about 3 °C. The sea averages 8.6 °C – swimming is only for the hardy. The sun is scarce, with only about 2.9 hours a day. It rains often – on about 17 days, adding up to 151 mm. All in all, October is not an ideal month for a holiday in Selfoss.
More details for October
- Daylight
- 9 h 59 min08:10 – 18:09
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 72 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC+0offset from UTC
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %9 %
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 Selfoss
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 Selfoss: score 56 against 3. In July, days are 8 °C warmer than in October. The sea is 3 °C warmer in July. July has 2 fewer rainy days. The sun shines 2 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 3 | 56better |
| Daytime high | 8° | 16° |
| Night-time low | 3° | 10° |
| Sea | 8.6° | 11.7° |
| Sunshine | 2.9 h | 5.1 hbetter |
| Rainy days | 17 | 15better |
| Rainfall | 151 mm | 92 mmbetter |
Based on the climate averages 1996–2025.
Selfoss month by month
The typical weather for every month at a glance.
0January3° · Sea 6° · 0.8 h
In January, Selfoss is cold: daytime highs average 3 °C, and nights often drop below freezing (−1 °C). The sea averages 6.0 °C – swimming is only for the hardy. The sun is scarce, with only about 0.8 hours a day. Precipitation falls on about 19 days, totalling 155 mm; on about 8 of them it snows. All in all, January is not an ideal month for a holiday in Selfoss.
Selfoss in January0February4° · Sea 6° · 2.2 h
In February, Selfoss is cold: daytime highs average 4 °C, and nights often drop below freezing (−2 °C). The sea averages 5.8 °C – swimming is only for the hardy. The sun is scarce, with only about 2.2 hours a day. Precipitation falls on about 18 days, totalling 152 mm; on about 9 of them it snows. All in all, February is not an ideal month for a holiday in Selfoss.
Selfoss in February2March5° · Sea 6° · 3.4 h
In March, Selfoss is cold: daytime highs average 5 °C, and nights often drop below freezing (−1 °C). The sea averages 5.9 °C – swimming is only for the hardy. The sun is scarce, with only about 3.4 hours a day. It rains often – on about 18 days, adding up to 144 mm. Snow falls on about 8 days. All in all, March is not an ideal month for a holiday in Selfoss.
Selfoss in March12April8° · Sea 7° · 5.2 h
In April, Selfoss is cold: daytime highs average 8 °C, and nights cool down to about 1 °C. The sea averages 6.6 °C – swimming is only for the hardy. Expect around 5.2 hours of sunshine a day. It rains often – on about 16 days, adding up to 110 mm. Snow falls on about 3 days. All in all, April is not an ideal month for a holiday in Selfoss.
Selfoss in April32May11° · Sea 8° · 6.2 h
In May, Selfoss is cool: daytime highs average 11 °C, and nights cool down to about 4 °C. The sea averages 8.0 °C – swimming is only for the hardy. Expect around 6.2 hours of sunshine a day. It rains often – on about 15 days, adding up to 100 mm. All in all, May is not an ideal month for a holiday in Selfoss.
Selfoss in May50June14° · Sea 10° · 5.7 h
In June, Selfoss is cool: daytime highs average 14 °C, and nights cool down to about 8 °C. The sea averages 10.0 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. Rain is frequent, with about 14 rainy days and 78 mm in total. All in all, June is a so-so month for a holiday in Selfoss.
Selfoss in June56July16° · Sea 12° · 5.1 h
In July, Selfoss is cool: daytime highs average 16 °C, and nights cool down to about 10 °C. The sea averages 11.7 °C – swimming is only for the hardy. Expect around 5.1 hours of sunshine a day. It rains often – on about 15 days, adding up to 92 mm. All in all, July is a so-so month for a holiday in Selfoss – and yet one of the best months here.
Selfoss in July50August15° · Sea 12° · 4.8 h
In August, Selfoss is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 11.8 °C – swimming is only for the hardy. Expect around 4.8 hours of sunshine a day. It rains often – on about 15 days, adding up to 116 mm. All in all, August is a so-so month for a holiday in Selfoss.
Selfoss in August24September12° · Sea 10° · 3.7 h
In September, Selfoss is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 10.4 °C – swimming is only for the hardy. The sun is scarce, with only about 3.7 hours a day. It rains often – on about 19 days, adding up to 175 mm. All in all, September is not an ideal month for a holiday in Selfoss.
Selfoss in September3October8° · Sea 9° · 2.9 h
In October, Selfoss is cold: daytime highs average 8 °C, and nights cool down to about 3 °C. The sea averages 8.6 °C – swimming is only for the hardy. The sun is scarce, with only about 2.9 hours a day. It rains often – on about 17 days, adding up to 151 mm. All in all, October is not an ideal month for a holiday in Selfoss.
Selfoss in October3November5° · Sea 7° · 1.3 h
In November, Selfoss is cold: daytime highs average 5 °C, and nights cool down to about 1 °C. The sea averages 7.3 °C – swimming is only for the hardy. The sun is scarce, with only about 1.3 hours a day. It rains often – on about 17 days, adding up to 140 mm. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Selfoss.
Selfoss in November0December4° · Sea 6° · 0.3 h
In December, Selfoss is cold: daytime highs average 4 °C, and nights often drop below freezing (−1 °C). The sea averages 6.4 °C – swimming is only for the hardy. The sun is scarce, with only about 0.3 hours a day. Precipitation falls on about 18 days, totalling 156 mm; on about 8 of them it snows. All in all, December is not an ideal month for a holiday in Selfoss.
Selfoss in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Selfoss
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 3°. The room should be heated.
The coolest nights are in February (−2°), 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 | 3° | −1° | 6.0° | 0.8 h | 19 | 155 |
| FebruaryFeb | 0 | 4° | −2° | 5.8° | 2.2 h | 18 | 152 |
| MarchMar | 2 | 5° | −1° | 5.9° | 3.4 h | 18 | 144 |
| AprilApr | 12 | 8° | 1° | 6.6° | 5.2 h | 16 | 110 |
| MayMay | 32 | 11° | 4° | 8.0° | 6.2 h | 15 | 100 |
| JuneJun | 50 | 14° | 8° | 10.0° | 5.7 h | 14 | 78 |
| JulyJul | 56 | 16° | 10° | 11.7° | 5.1 h | 15 | 92 |
| AugustAug | 50 | 15° | 9° | 11.8° | 4.8 h | 15 | 116 |
| SeptemberSep | 24 | 12° | 7° | 10.4° | 3.7 h | 19 | 175 |
| OctoberOct | 3 | 8° | 3° | 8.6° | 2.9 h | 17 | 151 |
| NovemberNov | 3 | 5° | 1° | 7.3° | 1.3 h | 17 | 140 |
| DecemberDec | 0 | 4° | −1° | 6.4° | 0.3 h | 18 | 156 |
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
63.93° N, 21.00° W · 16 m · Atlantic/Reykjavik
Sea temperature in Selfoss
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 7.9 – 9.4 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Selfoss ranges from 5.8 °C in February to 11.8 °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 11.1 and 12.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 6.0° | 5.4° | 6.7° | cold |
| FebruaryFeb | 5.8° | 5.2° | 6.5° | cold |
| MarchMar | 5.9° | 5.3° | 6.5° | cold |
| AprilApr | 6.6° | 6.0° | 7.1° | cold |
| MayMay | 8.0° | 7.5° | 8.7° | cold |
| JuneJun | 10.0° | 9.0° | 10.8° | cold |
| JulyJul | 11.7° | 10.8° | 12.8° | cold |
| AugustAug | 11.8° | 11.1° | 12.7° | cold |
| SeptemberSep | 10.4° | 9.6° | 11.2° | cold |
| OctoberOct | 8.6° | 7.9° | 9.4° | cold |
| NovemberNov | 7.3° | 6.7° | 7.9° | cold |
| DecemberDec | 6.4° | 5.8° | 6.8° | cold |
Sunshine hours in Selfoss
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 2.9 of 10.0 hours of daylight in Selfoss, 29 % 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 Selfoss: 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, Selfoss has about 17 rainy days with 151 mm of rain in total.
UV index in Selfoss
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 Selfoss
How breezy and how cloudy Selfoss 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 Selfoss typically peaks at 23 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: Sep – May.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 72 % of the sky over Selfoss: mostly cloudy, with about 2.9 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 Selfoss
When Selfoss 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, Selfoss has about 1 day with at least 1 cm of fresh snow, 6 cm in total. The chance of seeing snow during a week's stay is 17 out of 100: hardly any.
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 Selfoss
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Selfoss 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.
Selfoss has its best school-holiday weather during the summer holidays (score 52) and its weakest during the Christmas holidays (score 0).
- 9
Easter holidays
Mar – Apr
Poor
- 7 °C by day
- Sea 6 °C
- 4.7 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain, Snow
- 36
May half-term
May – Jun
Poor
- 11 °C by day
- Sea 8 °C
- 6.1 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 52
Summer holidays
Jul – Aug
FairBest holidays
- 15 °C by day
- Sea 12 °C
- 4.9 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 3
October half-term
Oct
Poor
- 8 °C by day
- Sea 9 °C
- 2.9 h of sun a day
- 17 rainy days a month
Keep in mind: Frequent rain
- 0
Christmas holidays
Dec – Jan
Poor
- 4 °C by day
- Sea 6 °C
- 0.6 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 40 min
- Distance
- 1,830 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
Selfoss compared
Put Selfoss side by side with another destination.
Selfoss vs Hveragerði
In October the holiday weather in Selfoss and Hveragerði is about equally good (score 3 vs 4). During the day it is about as warm in Hveragerði as in Selfoss. The sea is about equally warm.
| in October | Selfoss | Hveragerði |
|---|---|---|
| Holiday weather score | 3 | 4 |
| Daytime high | 8° | 8° |
| Sea | 9° | 9° |
| Sunshine | 3 h | 3 h |
| Rainy days | 17 | 16 |
| Best time | Jul | Jun – Aug |
Through the year
Iceland in October: the best places
In October, Selfoss ranks 8 of 14 destinations in this country.
- Stykkishólmur7°7°7
- 2Hafnarfjörður8°9°6
- 3Reykjavík8°9°6
- 4Grindavík8°9°6
- 5Keflavík8°9°6
- 6Borgarnes8°8°5
- 7Hveragerði8°9°4
- 8SelfossThis page8°9°3
Near Selfoss
Other destinations close by.
Places with a climate like Selfoss
Destinations whose weather through the year is closest to Selfoss's – good alternatives.
Frequently asked questions about Selfoss
When is the best time to visit Selfoss?
The best time to visit Selfoss 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 Selfoss?
The sea temperature in Selfoss ranges from 5.8 °C in February to 11.8 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Selfoss 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 Selfoss?
July is the warmest month, with average highs of 16 °C and nights around 10 °C. January is the coolest month at 3 °C.
When does it rain most in Selfoss?
The wettest month is September with 175 mm of precipitation. The driest month is June with 78 mm.
How many hours of sunshine does Selfoss get?
Selfoss gets around 1,270 hours of sunshine a year. The sunniest month is May with 6.2 hours a day; in December there are 0.3 hours a day.
What time zone is Selfoss in?
Selfoss is on UTC all year.
How long is the flight from London to Selfoss?
A nonstop flight from London to Selfoss takes about 2 h 40 min, for a straight-line distance of about 1,830 km.
Which school holidays are best for Selfoss?
Selfoss has its best school-holiday weather during the summer holidays (score 52) and its weakest during the Christmas holidays (score 0). Holiday ratings (0–100): Easter holidays 9, May half-term 36, summer holidays 52, October half-term 3, Christmas holidays 0.