Keflavík, Iceland — Weather in August 2026

Climate Overview

Keflavík, Iceland in August has mild conditions, with highs averaging 12.4°C (54°F) and noticeably cooler mornings. Rain falls on about 13 days this month. Sea temperature stays cool at 12.3°C (54°F).

This month falls at the end of Summer.

Temperatures remain fairly steady throughout August, with daily highs around 12°C (54°F).

August sees fairly even rainfall, totalling about 86 mm across the month.

Expect around 11.1h of sunshine at the start of August, decreasing to 8.2h by the end.

Wind speeds pick up through the month, from 21 km/h (13 mph) to 29 km/h (18 mph).

The warmest days tend to fall around the 5th, averaging 12.7°C (55°F).

Temperatures begin dropping heading into September.

Monthly August Averages

Temperature

12°C / 10°C

Feels Like

10°C / 6°C

Rain

13 days · 87 mm

Sunshine

9.5h / day

Humidity

83% — Very Humid

Wind

25 km/h

Wind Direction

NNE (12°)

Gusts

39 km/h

Daylight

16.3 h

Cloud Cover

74%

Clear Sky Days

UV Index

3.3 — Moderate

Sea Temperature

12°C

Dew Point

8°C — Dry

Moon Phase

Waxing Crescent · 3%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:23

Daylight 16.4h

Sunset 21:49

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	3°C / 0°C	-3°C / -7°C	19days (124 mm) Wet	1.4h Poor	77% Humid	0.2 Low	Wet	View Details
February	3°C / 0°C	-3°C / -6°C	18days (122 mm) Wet	3.5h Poor	78% Humid	0.8 Low	Wet	View Details
March	4°C / 1°C	-2°C / -6°C	17days (115 mm) Wet	6.7h Fair	76% Humid	1.8 Low	Poor	View Details
April	6°C / 3°C	2°C / -3°C	15days (102 mm) Wet	8.8h Good	78% Humid	3.1 Moderate	Poor	View Details
May	9°C / 5°C	5°C / 0°C	16days (101 mm) Wet	11h Excellent	78% Humid	4 Moderate	Poor	View Details
June best	11°C / 8°C	7°C / 4°C	14days (76 mm) Wet	10.9h Excellent	81% Humid	4.2 Moderate	Fair	View Details
July best	13°C / 10°C	10°C / 6°C	13days (71 mm) Wet	10.6h Excellent	84% Humid	4.1 Moderate	Fair	View Details
August best	12°C / 10°C	10°C / 6°C	13days (87 mm) Wet	9.5h Good	83% Humid	3.3 Moderate	Fair	View Details
September	10°C / 7°C	6°C / 3°C	18days (135 mm) Wet	7.2h Good	81% Humid	2.2 Moderate	Wet	View Details
October	7°C / 5°C	3°C / -1°C	18days (134 mm) Wet	4.5h Fair	81% Humid	1 Low	Wet	View Details
November	5°C / 2°C	0°C / -4°C	16days (111 mm) Wet	1.9h Poor	79% Humid	0.4 Low	Poor	View Details
December	3°C / 0°C	-2°C / -6°C	17days (112 mm) Wet	1.1h Poor	78% Humid	0.1 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is August a good time to visit Keflavík?

August is typically fair for visiting Keflavík, with average highs of 12°C (54°F) and around 13 rainy days. Keflavík, Iceland in August has mild conditions, with highs averaging 12.4°C (54°F) and noticeably cooler mornings. Rain

Does it rain a lot in Keflavík in August?

Keflavík typically sees around 13 rainy days in August with 87 mm (3.4 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Keflavík in August?

Nights in Keflavík during August are cool at around 10°C (49°F). Bring a jacket or sweater for evenings.

What should I pack for Keflavík in August?

With highs of 12°C (54°F) and lows of 10°C (49°F) in August, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

Is August among the best months weather-wise in Keflavík?

Yes, August offers some of the best weather conditions in Keflavík with comfortable temperatures and lower chances of rain.

What is the UV index in Keflavík in August?

The average UV index in Keflavík during August is 3 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Keflavík in August?

Keflavík gets approximately 16 hours of daylight per day in August, with around 10 hours of sunshine.

Does it snow in Keflavík in August?

Snow is uncommon in Keflavík during August based on 10-year climate averages.

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