Keflavik in Spring
In spring (March, April and May), Keflavik sees average daytime highs around 6°C and overnight lows near 3°C, with 283 mm of precipitation over about 47 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 3°C in early March to 9°C by late May. The sky is clear or mostly clear about 12% of the time across spring, and the air most often feels dry.
Spring is Keflavik's 3rd-best season to visit on our travel score. For the whole year in context, see Keflavik's year-round climate.
- Avg daytime high
- 6°C
- 3rd-warmest season
- Avg overnight low
- 3°C
- Precipitation
- 283 mm
- 47 wet days
- Avg wind
- 23 km/h
- Travel score
- 0.5
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Keflavik in Spring
Over the season highs climb from about 3°C in early March to 9°C by late May.
A typical spring day in Keflavik reaches about 6°C and drops to 3°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Keflavik
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 71 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Keflavik weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 3° / 0° | 125 | 18.8 | 9.7 | 5 | 0.0 |
| Feb | 3° / -0° | 123 | 17.4 | 10.4 | 8 | 0.0 |
| Mar | 4° / 0° | 113 | 17.6 | 9.3 | 11.2 | 0.0 |
| Apr | 6° / 2° | 91 | 15.4 | 3.4 | 14.6 | 0.3 |
| May | 8° / 5° | 79 | 13.9 | 0.5 | 17.8 | 1.2 |
| Jun | 11° / 8° | 67 | 12.8 | 0 | 20.1 | 2.3 |
| Jul | 12° / 10° | 74 | 12.8 | 0 | 19.1 | 3.0 |
| Aug | 12° / 10° | 97 | 14.2 | 0 | 16 | 2.8 |
| Sep | 10° / 7° | 134 | 17.2 | 0 | 12.7 | 1.8 |
| Oct | 7° / 4° | 120 | 15.4 | 1.6 | 9.3 | 0.8 |
| Nov | 5° / 2° | 124 | 17.2 | 4.9 | 6.1 | 0.0 |
| Dec | 4° / 1° | 129 | 18.6 | 9.1 | 3.9 | 0.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 12% of the time across spring.
Chance of precipitation in Spring
Keflavik gets around 283 mm of rain and snow over 47 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 23 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 9 h 30 min in early March to 19 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 3.4 kWh/m².
Is spring a good time to visit Keflavik?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Keflavik.
What to pack for Keflavik in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Keflavik sees daytime highs around 6°C and nights near 3°C. Pack a warm layer and rain gear. Worth having: a heavy coat, sun protection and a windbreaker. About 47 days see rain.
Sea temperature near Keflavik in Spring
The nearest coast averages about 6°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in August at about 11°C and coldest in March near 5°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 5 | 5 | 6 | 7 | 9 | 11 | 11 | 10 | 8 | 7 | 6 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 5 | Bracing |
| Mar | 5 | Bracing |
| Apr | 6 | Bracing |
| May | 7 | Bracing |
| Jun | 9 | Bracing |
| Jul | 11 | Bracing |
| Aug | 11 | Bracing |
| Sep | 10 | Bracing |
| Oct | 8 | Bracing |
| Nov | 7 | Bracing |
| Dec | 6 | Bracing |
UV index in Keflavik in Spring
Clear-sky midday UV across spring averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Keflavik peaks around June 21 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 3 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 0 | 1 | 2 | 3 | 5 | 4 | 3 | 2 | 1 | 0 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | Moderate | Moderate | Moderate | Low | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 0 | Low |
| Mar | 1 | Low |
| Apr | 2 | Moderate |
| May | 3 | Moderate |
| Jun | 5 | Moderate |
| Jul | 4 | Moderate |
| Aug | 3 | Moderate |
| Sep | 2 | Low |
| Oct | 1 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Where is Keflavik?
Keflavik sits at 64.0°N, 22.6°W, 5 m above sea level, in Iceland. The nearest listed city is Reykjanesbær, 1.0 km away.
Topography around Keflavik
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Keflavik.
Within 3 km, the terrain around Keflavik has only modest variations in elevation — a maximum elevation change of 60 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 187 m; within 80 km, large variations in elevation — a maximum elevation change of 1,065 m.
The land around Keflavik is covered by grassland (45%) and water (37%) within 3 km, water (57%) and grassland (36%) within 16 km, and water (67%) and grassland (28%) within 80 km.
Iceland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 118% of US
- price level, 2025
- GDP per capita
- $98,323
- 2025
- Happiness
- 7.5 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.3
- per 100k, 2023
- Road deaths
- 2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Keflavik (64.0049°, -22.5624°, elevation 5 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.