Grindavík Weather in May
May in Grindavík brings low temperatures, with daytime highs of 10°C (50°F) and nights around 5°C (41°F). Quite a bit of rainfall is expected, around 89 mm (3.5 in), so pack an umbrella.
Rainfall in Grindavík in May
The climate data from previous years indicates about 16 days of rain, averaging 89 mm (3.5 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Grindavík in May
Grindavík in May gets highs of 10°C (50°F) during the day and drops to 5°C (41°F) at night. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Grindavík in May
Expect a lot of sunshine this month, with about 201 hours of sun. These sunny conditions help offset the cool temperatures, making it a pleasant month to explore outdoors.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Grindavík. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Grindavík's climate page.
Grindavík Temperature in May
Min Temperature
5°C (41°F)
Max Temperature
10°C (50°F)
Chance of Rain
54%
Precipitation
89 mm (3.5 in)
Rainy days
16 days
Humidity
76% *
Sunshine
201 hours *
Percentage Sunshine
35% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Grindavík typically rise from around 7°C (45°F) at the start of May to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 6°C (43°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Grindavík in May
Browse day-by-day weather records for Grindavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grindavík historical weather extremes in May
Based on 50 years of weather observations in Grindavík between 1976 and 2026, these are the recorded extremes.
- On May 15, 1988, temperatures climbed to 20°C (68°F), marking the warmest May day on record.
- The lowest daytime temperature in May was -2°C (28°F), recorded on May 3, 1982.
- The coldest night in May in Grindavík was on May 5, 1982, with a minimum of -6°C (21°F).
- The heaviest May precipitation occurred on May 24, 2024, when 44 mm (1.7 in) of precipitation fell.
Best Places in Iceland in May
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in May →
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What to Wear in Grindavík in May
We recommend to layer up for chilly conditions in Grindavík in May. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Grindavík in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Grindavík's climate page.
Temperature Rainfall Sunshine Humidity
See the full Grindavík climate overview or explore weather in Iceland.
