Rosslare Weather in May
May in Rosslare averages 13°C (55°F) during the day and 10°C (50°F) at night. With just 61 mm (2.4 in) of rainfall on average, it doesn't get much drier than this.
Rainfall in Rosslare in May
Take advantage of the dry conditions this month, with minimal rain expected, even if it's a cooler time of year. You can expect rain on roughly 15 days based on historical data, averaging 61 mm (2.4 in) for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Rosslare in May
If you're visiting Rosslare in May, expect highs of 13°C (55°F) and overnight lows around 10°C (50°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Rosslare in May
There are approximately 213 hours of sunshine this month, resulting in mostly clear days. Despite the cool temperatures, the sunshine makes it an enjoyable time to be outside.
Wind Speed in Rosslare in May
May has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in May
The water temperature is only 11°C (52°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.Should you favor a climate that's both dry and comfortably warm, August typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Rosslare's climate page.
Rosslare Temperature in May
Min Temperature
10°C (50°F)
Max Temperature
13°C (55°F)
Water Temperature
11°C (52°F)
Chance of Rain
51%
Precipitation
61 mm (2.4 in)
Rainy days
15 days
Humidity
77%
Windspeed
5 m/s (10 knots)
Sunshine
213 hours
Percentage Sunshine
47%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Rosslare typically stay consistent throughout May, with daily highs averaging around 13°C (55°F). Nights are cool, with lows typically ranging from 7°C (45°F) to 10°C (50°F).
Average temperatures in May
Historical weather for Rosslare in May
Browse day-by-day weather records for Rosslare spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rosslare historical weather extremes in May
Our historical data for Rosslare spans 1976 to 2026, revealing these weather extremes.
- The warmest day in May was on May 26, 2026, with a maximum of 26°C (79°F).
- The lowest daytime temperature in May was 6°C (43°F), recorded on May 1, 1979.
- The coldest night in May in Rosslare was on May 7, 1997, with a minimum of 1°C (34°F).
Best Places in Ireland in May
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in May →
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What to Wear in Rosslare in May
The weather can swing between comfortable and chilly in May, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days. The water temperature sits at about 11°C (52°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Rosslare 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 Ireland, check out our Rosslare's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Rosslare climate overview or explore weather in Ireland.
